JP3569810B2 - High temperature thermistor - Google Patents
High temperature thermistor Download PDFInfo
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- JP3569810B2 JP3569810B2 JP20914993A JP20914993A JP3569810B2 JP 3569810 B2 JP3569810 B2 JP 3569810B2 JP 20914993 A JP20914993 A JP 20914993A JP 20914993 A JP20914993 A JP 20914993A JP 3569810 B2 JP3569810 B2 JP 3569810B2
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- 150000001875 compounds Chemical class 0.000 claims description 92
- 239000000843 powder Substances 0.000 claims description 89
- 239000006104 solid solution Substances 0.000 claims description 55
- 229910052596 spinel Inorganic materials 0.000 claims description 30
- 239000011029 spinel Substances 0.000 claims description 30
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 26
- 229910052759 nickel Inorganic materials 0.000 claims description 14
- 229910017052 cobalt Inorganic materials 0.000 claims description 12
- 239000010941 cobalt Substances 0.000 claims description 12
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 12
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 12
- 239000011701 zinc Substances 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 229910052749 magnesium Inorganic materials 0.000 claims description 11
- 239000011777 magnesium Substances 0.000 claims description 11
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- 229910052726 zirconium Inorganic materials 0.000 claims description 11
- 229910002515 CoAl Inorganic materials 0.000 claims description 9
- 229910003321 CoFe Inorganic materials 0.000 claims description 9
- 229910000684 Cobalt-chrome Inorganic materials 0.000 claims description 9
- 229910015372 FeAl Inorganic materials 0.000 claims description 9
- 229910002546 FeCo Inorganic materials 0.000 claims description 9
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 9
- 241000877463 Lanio Species 0.000 claims description 9
- 229910020068 MgAl Inorganic materials 0.000 claims description 9
- 229910017916 MgMn Inorganic materials 0.000 claims description 9
- 229910017682 MgTi Inorganic materials 0.000 claims description 9
- 229910016583 MnAl Inorganic materials 0.000 claims description 9
- 229910000943 NiAl Inorganic materials 0.000 claims description 9
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 9
- 239000010952 cobalt-chrome Substances 0.000 claims description 9
- 229910001120 nichrome Inorganic materials 0.000 claims description 9
- 229910052718 tin Inorganic materials 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 7
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 239000011787 zinc oxide Substances 0.000 claims description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910021446 cobalt carbonate Inorganic materials 0.000 description 2
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 description 2
- 239000011363 dried mixture Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000011656 manganese carbonate Substances 0.000 description 2
- 235000006748 manganese carbonate Nutrition 0.000 description 2
- 229940093474 manganese carbonate Drugs 0.000 description 2
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 2
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910000008 nickel(II) carbonate Inorganic materials 0.000 description 2
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical compound [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011667 zinc carbonate Substances 0.000 description 2
- 235000004416 zinc carbonate Nutrition 0.000 description 2
- 229910000010 zinc carbonate Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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Description
【0001】
【産業上の利用分野】
本発明は、ガス火炎温度,自動車の排ガス温度測定などに用いる高温用サーミスタに関する。
【0002】
【従来の技術】
ガス給湯器等のガス火炎温度,自動車の排ガス温度測定等に用いられる高温用サーミスタ素子は、Al,Zr,Mg,Cr等を主成分とし、1500〜1650℃の温度で焼成されたものであった。
【0003】
【発明が解決しようとする課題】
しかしながら、従来の高温用サーミスタ素子は、Al,Zr,Mg,Cr等を主成分とする焼結体であるために、1500〜1650℃というかなりの高温で焼結しなければならず、また、高温の環境のもとで使用されるため、使用状況によっては雰囲気等環境からの影響を受けて組成が変化し、特性のバラツキが大きく、使用時の安定性に欠けるという問題があった。
【0004】
本発明の目的は、1300℃の焼成温度で十分に焼結が可能であり、特性のバラツキが小さく、400〜550℃の温度領域において、素子自体の抵抗変化率が小さく、寿命特性に優れた高温用サーミスタを提供することにある。
【0005】
【課題を解決するための手段】
上記目的を達成するため、本発明によるサーミスタにおいては、酸化物固溶体粉末と化合物粉体との混合焼結体よりなり、400℃〜550℃の温度領域で使用する高温用サーミスタであって、
酸化物固溶体粉末は、250℃で低抵抗を示すマンガン、ニッケル、コバルト、亜鉛の酸化物固溶体であり、
化合物粉体は、スピネル化合物又はペロブスカイト化合物の内から選ばれた2種類又はそれ以上の化合物であり、
スピネル化合物は、SnAl 2 O 4 ,MnAl 2 O 4 ,MnCr 2 O 4 ,MnTi 2 O 4 ,ZnCr 2 O 4 ,ZnAl 2 O 4 ,ZnTi 2 O 4 ,ZnFe 2 O 4 ,CrAl 2 O 4 ,MgTi 2 O 4 ,MgAl 2 O 4 ,MgMn 2 O 4 ,MgCr 2 O 4 ,FeAl 2 O 4 ,FeCr 2 O 4 ,FeCo 2 O 4 ,CoFe 2 O 4 ,CoAl 2 O 4 ,CoCr 2 O 4 ,NiCr 2 O 4 ,NiAl 2 O 4 であり、
ペロブスカイト化合物は、LaYO 3 ,LaAlO 3 ,YCrO 3 ,YFeO 3 ,CaTiO 3 ,CaSnO 3 ,MgCeO 3 ,BaCeO 3 ,CeAlO 3 ,CeCrO 3 ,CeFeO 3 ,LaTiO 3 ,LaNiO 3 であり、
酸化物固溶体粉末に添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部である。
【0006】
また、酸化物固溶体粉末と化合物粉体との混合焼結体よりなり、400℃〜550℃の温度領域で使用する高温用サーミスタであって、
酸化物固溶体粉末は、250℃で低抵抗を示すマンガン、ニッケル、コバルト、亜鉛の酸化物固溶体であり、
化合物粉体は、スピネル化合物又はペロブスカイト化合物の内から選ばれた2種類又はそれ以上の化合物であり、
スピネル化合物は、SnAl 2 O 4 ,MnAl 2 O 4 ,MnCr 2 O 4 ,MnTi 2 O 4 ,ZnCr 2 O 4 ,ZnAl 2 O 4 ,ZnTi 2 O 4 ,ZnFe 2 O 4 ,CrAl 2 O 4 ,MgTi 2 O 4 ,MgAl 2 O 4 ,MgMn 2 O 4 ,MgCr 2 O 4 ,FeAl 2 O 4 ,FeCr 2 O 4 ,FeCo 2 O 4 ,CoFe 2 O 4 ,CoAl 2 O 4 ,CoCr 2 O 4 ,NiCr 2 O 4 ,NiAl 2 O 4 であり、
ペロブスカイト化合物は、LaYO 3 ,LaAlO 3 ,YCrO 3 ,YFeO 3 ,CaTiO 3 ,CaSnO 3 ,MgCeO 3 ,BaCeO 3 ,CeAlO 3 ,CeCrO 3 ,CeFeO 3 ,LaTiO 3 ,LaNiO 3 であり、
酸化物固溶体粉末に添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部である。
【0007】
また、酸化物固溶体粉末と化合物粉体との混合焼結体よりなり、400℃〜550℃の温度領域で使用する高温用サーミスタであって、
酸化物固溶体粉末は、マンガン,ニッケル,コバルト,亜鉛と、アルミニウム,マグネシウム,ジルコニウム,スズの内から選ばれた1種類との酸化物固溶体であり、
化合物粉体は、スピネル化合物又はペロブスカイト化合物の内のいずれか一方の化合物の1種類を選択的に含むものであり、
スピネル化合物は、SnAl 2 O 4 ,MnAl 2 O 4 ,MnCr 2 O 4 ,MnTi 2 O 4 ,ZnCr 2 O 4 ,ZnAl 2 O 4 ,ZnTi 2 O 4 ,ZnFe 2 O 4 ,CrAl 2 O 4 ,MgTi 2 O 4 ,MgAl 2 O 4 ,MgMn 2 O 4 ,MgCr 2 O 4 ,FeAl 2 O 4 ,FeCr 2 O 4 ,FeCo 2 O 4 ,CoFe 2 O 4 ,CoAl 2 O 4 ,CoCr 2 O 4 ,NiCr 2 O 4 ,NiAl 2 O 4 であり、
ペロブスカイト化合物は、LaYO 3 ,LaAlO 3 ,YCrO 3 ,YFeO 3 ,CaTiO 3 ,CaSnO 3 ,MgCeO 3 ,BaCeO 3 ,CeAlO 3 ,CeCrO 3 ,CeFeO 3 ,LaTiO 3 ,LaNiO 3 であり、
酸化物固溶体粉末に添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部である。
【0008】
また、酸化物固溶体粉末と化合物粉体との混合焼結体よりなり、400℃〜550℃の温度領域で使用する高温用サーミスタであって、
酸化物固溶体粉末は、マンガン,ニッケル,コバルト,亜鉛と、アルミニウム,マグネシウム,ジルコニウム,スズの内から選ばれた1種類との酸化物固溶体であり、
化合物粉体は、スピネル化合物又はペロブスカイト化合物の内から選ばれた2種類又はそれ以上の化合物であり、
スピネル化合物は、SnAl 2 O 4 ,MnAl 2 O 4 ,MnCr 2 O 4 ,MnTi 2 O 4 ,ZnCr 2 O 4 ,ZnAl 2 O 4 ,ZnTi 2 O 4 ,ZnFe 2 O 4 ,CrAl 2 O 4 ,MgTi 2 O 4 ,MgAl 2 O 4 ,MgMn 2 O 4 ,MgCr 2 O 4 ,FeAl 2 O 4 ,FeCr 2 O 4 ,FeCo 2 O 4 ,CoFe 2 O 4 ,CoAl 2 O 4 ,CoCr 2 O 4 ,NiCr 2 O 4 ,NiAl 2 O 4 であり、
ペロブスカイト化合物は、LaYO 3 ,LaAlO 3 ,YCrO 3 ,YFeO 3 ,CaTiO 3 ,CaSnO 3 ,MgCeO 3 ,BaCeO 3 ,CeAlO 3 ,CeCrO 3 ,CeFeO 3 ,LaTiO 3 ,LaNiO 3 であり、
酸化物固溶体粉末に添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部である。
【0009】
【作用】
1)酸化物固溶体粉末に、マンガン,ニッケル,コバルト,亜鉛を用いるときには、Mnを5〜70モル%,Niを5〜70モル%,Coを1〜40モル%,Znを1〜40モル%を含む金属元素を混合し、その混合モル比が100%になるように調整する。
【0010】
2)マンガン,ニッケル,コバルト,亜鉛のほかに、アルミニウム,マグネシウム,ジルコニウム,スズの内から選ばれた1種類の酸化物固溶体を添加するときには、Mnを5〜70モル%,Niを5〜70モル%,Coを1〜40モル%,Znを1〜40モル%と、Al,Mg,Zr,Snの中から選ばれた1種類の成分を1〜40モル%含む5種類の金属元素を混合し、その混合モル比が100%になるように調整する。
【0011】
スピネル化合物粉末は、SnAl2O4,MnAl2O4,MnCr2O4,MnTi2O4,ZnCr2O4,ZnAl2O4,ZnTi2O4,ZnFe2O4,CrAl2O4,MgTi2O4,MgAl2O4,MgMn2O4,MgCr2O4,FeAl2O4,FeCr2O4,FeCo2O4,CoFe2O4,CoAl2O4,CoCr2O4,NiCr2O4,NiAl2O4になるように調整されたものである。
【0012】
ペロブスカイト化合物粉末は、LaYO3,LaAlO3,YCrO3,YFeO3,CaTiO3,CaSnO3,MgCeO3,BaCeO3,CeAlO3,CeCrO3,CeFeO3,LaTiO3,LaNiO3に調整されたものである。
【0013】
スピネル化合物粉末又はペロブスカイト化合物粉末は、その1種類又は2種類以上が選択的に酸化物固溶体粉末に添加され、混合焼成体として焼成される。スピネル化合物粉末又はペロブスカイト化合物粉末の内の1種類の化合物粉体を前記1)の酸化物固溶体粉末に添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部である。また、前記2)の酸化物固溶体粉末2種類以上の化合物を添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部である。
【0014】
マンガン,ニッケル,コバルト,亜鉛及びアルミニウム,マグネシウム,ジルコニウム,スズの酸化物固溶体は、250℃で低抵抗を示し、焼結性に優れている。また、前記スピネル化合物は、250℃で高抵抗を示し、前記ペロブスカイト化合物は、低抵抗を示す材料である。
【0015】
本発明によるサーミスタは、上記特性を有する材料を選択的に組合せた混合焼結体であり、高温材料としてはかなり低い1300℃の焼結温度で十分に焼結され、バラツキが小さい任意の抵抗値と抵抗温度係数を有するサーミスタが得られる。
【0016】
サーミスタ素子は、ペースト状に混練した成分を白金線の対間に塗布して粒状に加工するビード形のほか、焼成体のブロックから切り出したチップをガラス封入したものであっても同じ性能が得られ、素子の製造方法は何等の制約を受けるものではない。
【0017】
本発明においては、特にZn,Al,Mg,Zr,Snは1〜40モル%の範囲内に調整することが重要である。1モル%以下の場合には、高温耐熱性に劣り、40モル%以上の場合には焼結性が低下し、抵抗値のバラツキが大きくなると同時に高温耐熱性も劣化する現象がみられるようになる。一方、スピネル及びペロブスカイト化合物の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部の範囲内に調整することが重要である。
【0018】
添加量が1重量%以下の場合は、スピネル又はペロブスカイト化合物の添加効果が顕著に現れず本目的である高温耐熱の向上がみられず、逆に添加量が60重量%以上を超えた場合は、焼結性が低下し、抵抗値が異常に高くなったり、高温耐熱性が劣化する現象がみられる。
【0019】
【実施例】
以下に本発明の実施例を示す。
【0020】
(実施例1)炭酸マンガン,炭酸ニッケル,炭酸コバルト,炭酸亜鉛の各粉末を秤量し、各々をボールミルに投入し、24時間混合した。これを乾燥後、約1000℃で16時間仮焼し、その粉末をさらにボールミルで混合粉砕後、乾燥させて酸化物固溶体粉末を得た。
【0021】
一方、スピネル化合物には、AB2O4,ペロブスカイト化合物にはABO3
という化学式で示される化合物を用いた。スピネル化合物の場合は、金属モル比でA:B=1:2,ペロブスカイト化合物の場合は、金属モル比でA:B=1:1になるように配合し、1000〜1100℃で仮焼後、粉砕を行い、各々スピネル及びペロブスカイト化合物粉末を得た。
【0022】
この酸化物粉末100重量部に、スピネルもしくはペロブスカイト化合物粉末を1〜60重量部の範囲内で湿式混合後、乾燥させたものに4Wt%のポリビニール溶液を適宜添加してペースト状に昆練した。
【0023】
得られたペーストを250ミクロンの間隔を開けて張った直径80ミクロンの白金線の対に塗布し、粒状にして乾燥後1250〜1300℃で1〜3時間焼成を行い、ビード形のサーミスタを形成した。
【0024】
このようにして製造されたサーミスタの代表例を表1,2に示し、550℃における抵抗値経時変化率を図1に示す。
【0025】
【表1】
【0026】
【表2】
【0027】
(実施例2)実施例1に使用した酸化物固溶体粉末100重量部にスピネル化合物、もしくはペロブスカイト化合物として調整された化合物粉末の内、2種類もしくはそれ以上の化合物粉末を合計で1〜60重量部の範囲内で湿式混合後、乾燥させたものに4wt%のポリビニールアルコール溶液を適量添加してペースト状に混練した。
【0028】
得られたペーストを250ミクロンの間隔を開けて張った直径80ミクロンの白金線の対に塗布し粒状にして乾燥後、1250〜1300℃で1〜3時間焼成を行い、ビード形のサーミスタを形成した。
【0029】
このようにして製造されたサーミスタの代表例を表3,4に示し、550℃における抵抗値経時変化率を図3,4に示す。
【0030】
【表3】
【0031】
【表4】
【0032】
(実施例3)炭酸マンガン,炭酸ニッケル,炭酸コバルト,炭酸亜鉛と、酸化アルミニウム,炭酸マグネシウム,酸化ジルコニウム,酸化スズの中か選ばれた1種類との材料を秤量し、ボールミルで24時間混合した。これを乾燥後、約1000℃で16時間仮焼し、その粉末をさらにボールミルで混合粉砕後、乾燥させて酸化物固溶体粉末を得た。
【0033】
この酸化物固溶体粉末100重量部に、実施例1で調整したスピネル若しくはペロブスカイト化合物粉末の内、どちらか1種類を1〜60重量部の範囲内で湿式混合後、乾燥させたものに4wt%のポリビニールアルコール溶液を適量添加してペースト状に混練した。
【0034】
得られたペーストを250ミクロンの間隔を開けて張った直径80ミクロンの白金線上に塗布し、粒状にして乾燥後1250〜1300℃で1〜3時間焼成を行い、ビード形のサーミスタを形成した。
【0035】
このようにして製造されたサーミスタの代表例を表5に示し、550℃における抵抗値経時変化率を図5に示す。
【0036】
【表5】
【0037】
(実施例4)実施例3で調整された酸化物固溶体粉末100重量部に、実施例1で調整したスピネル若しくはペロブスカイト化合物の内、2種類もしくはそれ以上の化合物粉末を合計で1〜60重量部の範囲内で湿式混合後、乾燥させたものに4wt%のポリビニールアルコール溶液を適量添加してペースト状に混練した。
【0038】
得られたペーストを250ミクロンの間隔を開けて張った直径80ミクロンの白金線の対に塗布し、粒状にして乾燥後1250〜1300℃で1〜3時間焼成を行い、ビード形のサーミスタを形成した。
【0039】
このようにして製造されたサーミスタの代表例を表6に示し、550℃における抵抗値経時変化率を図6に示す。
【0040】
【表6】
【0041】
【発明の効果】
以上のように本発明は、250℃で低抵抗を示し、焼結性に優れたマンガン,ニッケル,コバルト,亜鉛及び必要により添加されたアルミニウム,マグネシウム,ジルコニウム,スズの酸化物固溶体粉末と、250℃で高抵抗を示すスピネル化合物及び/又は低抵抗を示すペロブスカイト化合物粉体との混合焼結体からなり、比較的低い温度で焼結が可能であり、バラツキが小さく、任意の抵抗値と、抵抗温度係数が得られ、特に400〜550℃の温度領域で使用するガス火炎温度,自動車の排ガス温度、その他の温度測定用サーミスタとして抵抗変化率が小さく、寿命特性に優れた効果を得ることができる。
【図面の簡単な説明】
【図1】実施例1における抵抗値の経時変化率を示す図である。
【図2】実施例1における抵抗値の経時変化率を示す図である。
【図3】実施例2における抵抗値の経時変化率を示す図である。
【図4】実施例2における抵抗値の経時変化率を示す図である。
【図5】実施例3における抵抗値の経時変化率を示す図である。
【図6】実施例4における抵抗値の経時変化率を示す図である。[0001]
[Industrial applications]
The present invention relates to a high temperature thermistor used for measuring gas flame temperature, exhaust gas temperature of automobiles, and the like.
[0002]
[Prior art]
A high-temperature thermistor element used for measuring a gas flame temperature of a gas water heater, an exhaust gas temperature of an automobile, etc. is mainly composed of Al, Zr, Mg, Cr and the like, and is fired at a temperature of 1500 to 1650 ° C. Was.
[0003]
[Problems to be solved by the invention]
However, since the conventional thermistor element for high temperature is a sintered body mainly containing Al, Zr, Mg, Cr, etc., it must be sintered at a considerably high temperature of 1500 to 1650 ° C. Since it is used in a high-temperature environment, there is a problem that the composition changes under the influence of the environment such as the atmosphere depending on the use condition, the characteristics vary greatly, and the stability during use is lacking.
[0004]
An object of the present invention is that sintering can be sufficiently performed at a firing temperature of 1300 ° C., variation in characteristics is small, and in a temperature range of 400 to 550 ° C., a resistance change rate of the element itself is small and life characteristics are excellent. It is to provide a high temperature thermistor.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a thermistor according to the present invention is a high temperature thermistor made of a mixed sintered body of an oxide solid solution powder and a compound powder and used in a temperature range of 400 ° C to 550 ° C,
Oxide solid solution powder is a manganese, nickel, cobalt, zinc oxide solid solution that exhibits low resistance at 250 ° C.
Compound powder, are two kinds or more compounds der selected from among spinel compounds or perovskite compound,
Spinel compounds include SnAl 2 O 4 , MnAl 2 O 4 , MnCr 2 O 4 , MnTi 2 O 4 , ZnCr 2 O 4 , ZnAl 2 O 4 , ZnTi 2 O 4 , ZnFe 2 O 4 , CrAl 2 O 4 , MgTi 2 O 4, MgAl 2 O 4 , MgMn 2 O 4, MgCr 2 O 4, FeAl 2 O 4, FeCr 2 O 4, FeCo 2 O 4, CoFe 2 O 4, CoAl 2 O 4, CoCr 2 O 4, NiCr 2 O 4 and NiAl 2 O 4 ,
The perovskite compounds are LaYO 3 , LaAlO 3 , YCrO 3 , YFeO 3 , CaTiO 3 , CaSnO 3 , MgCeO 3 , BaCeO 3 , CeAlO 3 , CeCrO 3 , CeFeO 3 , LaTiO 3 , and LaNiO 3 .
The amount of the compound powder to be added to the oxide solid solution powder is 1.0 to 60 parts by weight based on 100 parts by weight of the oxide solid solution powder.
[0006]
A high-temperature thermistor made of a mixed sintered body of an oxide solid solution powder and a compound powder and used in a temperature range of 400 ° C. to 550 ° C.
Oxide solid solution powder is a manganese, nickel, cobalt, zinc oxide solid solution that exhibits low resistance at 250 ° C.
Compound powder, are two kinds or more compounds der selected from among spinel compounds or perovskite compound,
Spinel compounds include SnAl 2 O 4 , MnAl 2 O 4 , MnCr 2 O 4 , MnTi 2 O 4 , ZnCr 2 O 4 , ZnAl 2 O 4 , ZnTi 2 O 4 , ZnFe 2 O 4 , CrAl 2 O 4 , MgTi 2 O 4, MgAl 2 O 4 , MgMn 2 O 4, MgCr 2 O 4, FeAl 2 O 4, FeCr 2 O 4, FeCo 2 O 4, CoFe 2 O 4, CoAl 2 O 4, CoCr 2 O 4, NiCr 2 O 4 and NiAl 2 O 4 ,
The perovskite compounds are LaYO 3 , LaAlO 3 , YCrO 3 , YFeO 3 , CaTiO 3 , CaSnO 3 , MgCeO 3 , BaCeO 3 , CeAlO 3 , CeCrO 3 , CeFeO 3 , LaTiO 3 , and LaNiO 3 .
The amount of the compound powder to be added to the oxide solid solution powder is 1.0 to 60 parts by weight based on 100 parts by weight of the oxide solid solution powder.
[0007]
A high-temperature thermistor made of a mixed sintered body of an oxide solid solution powder and a compound powder and used in a temperature range of 400 ° C. to 550 ° C.
The oxide solid solution powder is an oxide solid solution of manganese, nickel, cobalt, zinc, and one selected from aluminum , magnesium, zirconium , and tin,
The compound powder selectively contains one of the spinel compound and the perovskite compound.
Spinel compounds include SnAl 2 O 4 , MnAl 2 O 4 , MnCr 2 O 4 , MnTi 2 O 4 , ZnCr 2 O 4 , ZnAl 2 O 4 , ZnTi 2 O 4 , ZnFe 2 O 4 , CrAl 2 O 4 , MgTi 2 O 4, MgAl 2 O 4 , MgMn 2 O 4, MgCr 2 O 4, FeAl 2 O 4, FeCr 2 O 4, FeCo 2 O 4, CoFe 2 O 4, CoAl 2 O 4, CoCr 2 O 4, NiCr 2 O 4 and NiAl 2 O 4 ,
The perovskite compounds are LaYO 3 , LaAlO 3 , YCrO 3 , YFeO 3 , CaTiO 3 , CaSnO 3 , MgCeO 3 , BaCeO 3 , CeAlO 3 , CeCrO 3 , CeFeO 3 , LaTiO 3 , and LaNiO 3 .
The amount of the compound powder to be added to the oxide solid solution powder is 1.0 to 60 parts by weight based on 100 parts by weight of the oxide solid solution powder.
[0008]
A high-temperature thermistor made of a mixed sintered body of an oxide solid solution powder and a compound powder and used in a temperature range of 400 ° C. to 550 ° C.
The oxide solid solution powder is an oxide solid solution of manganese, nickel, cobalt, zinc, and one selected from aluminum , magnesium, zirconium , and tin,
The compound powder is two or more compounds selected from a spinel compound or a perovskite compound,
Spinel compounds include SnAl 2 O 4 , MnAl 2 O 4 , MnCr 2 O 4 , MnTi 2 O 4 , ZnCr 2 O 4 , ZnAl 2 O 4 , ZnTi 2 O 4 , ZnFe 2 O 4 , CrAl 2 O 4 , MgTi 2 O 4, MgAl 2 O 4 , MgMn 2 O 4, MgCr 2 O 4, FeAl 2 O 4, FeCr 2 O 4, FeCo 2 O 4, CoFe 2 O 4, CoAl 2 O 4, CoCr 2 O 4, NiCr 2 O 4 and NiAl 2 O 4 ,
The perovskite compounds are LaYO 3 , LaAlO 3 , YCrO 3 , YFeO 3 , CaTiO 3 , CaSnO 3 , MgCeO 3 , BaCeO 3 , CeAlO 3 , CeCrO 3 , CeFeO 3 , LaTiO 3 , and LaNiO 3 .
The amount of the compound powder to be added to the oxide solid solution powder is 1.0 to 60 parts by weight based on 100 parts by weight of the oxide solid solution powder.
[0009]
[Action]
1) When manganese, nickel, cobalt, or zinc is used for the oxide solid solution powder, Mn is 5 to 70 mol%, Ni is 5 to 70 mol%, Co is 1 to 40 mol%, and Zn is 1 to 40 mol%. Are mixed and adjusted so that the mixture molar ratio becomes 100%.
[0010]
2) When adding one kind of oxide solid solution selected from aluminum , magnesium, zirconium , and tin in addition to manganese, nickel, cobalt, and zinc, Mn is 5-70 mol% and Ni is 5-70. Mol%, 1 to 40 mol% of Co, 1 to 40 mol% of Zn, and 5 kinds of metal elements containing 1 to 40 mol% of one kind of component selected from Al, Mg, Zr and Sn. Mix and adjust so that the mixture molar ratio becomes 100%.
[0011]
The spinel compound powder includes SnAl 2 O 4 , MnAl 2 O 4 , MnCr 2 O 4 , MnTi 2 O 4 , ZnCr 2 O 4 , ZnAl 2 O 4 , ZnTi 2 O 4 , ZnFe 2 O 4 , CrAl 2 O 4 , MgTi 2 O 4 , MgAl 2 O 4 , MgMn 2 O 4 , MgCr 2 O 4 , FeAl 2 O 4 , FeCr 2 O 4 , FeCo 2 O 4 , CoFe 2 O 4 , CoAl 2 O 4 , CoCr 2 O 4 , It was adjusted to be NiCr 2 O 4 and NiAl 2 O 4 .
[0012]
Perovskite compound powder is one which is adjusted to LaYO 3, LaAlO 3, YCrO 3 , YFeO 3, CaTiO 3, CaSnO 3, MgCeO 3, BaCeO 3, CeAlO 3, CeCrO 3, CeFeO 3, LaTiO 3, LaNiO 3 .
[0013]
One or more spinel compound powders or perovskite compound powders are selectively added to the oxide solid solution powder and fired as a mixed fired body. When one kind of the compound powder of the spinel compound powder or the perovskite compound powder is added to the oxide solid solution powder of 1) , the amount of the compound powder added is 100 parts by weight of the oxide solid solution powder. And 1.0 to 60 parts by weight . When two or more compounds of the oxide solid solution powder of the above 2) are added, the amount of the compound powder to be added is 1.0 to 60 parts by weight based on 100 parts by weight of the oxide solid solution powder. .
[0014]
Oxide solid solutions of manganese, nickel, cobalt, zinc and aluminum , magnesium, zirconium , tin exhibit low resistance at 250 ° C. and are excellent in sinterability. Further, the spinel compound is a material having a high resistance at 250 ° C., and the perovskite compound is a material having a low resistance.
[0015]
The thermistor according to the present invention is a mixed sintered body in which materials having the above-mentioned properties are selectively combined. And a thermistor having a temperature coefficient of resistance.
[0016]
The thermistor element can obtain the same performance even if it is a bead type in which components kneaded in a paste form are applied between a pair of platinum wires and processed into a granular form, or a chip cut out from a fired block and glass sealed. However, the manufacturing method of the device is not subject to any restrictions.
[0017]
In the present invention, it is particularly important to adjust Zn, Al, Mg, Zr, and Sn within a range of 1 to 40 mol%. When the amount is less than 1 mol%, the high-temperature heat resistance is inferior. When the amount is more than 40 mol%, the sinterability is reduced, the variation in the resistance value is increased, and the high-temperature heat resistance is also deteriorated. Become. On the other hand, the addition amount of the spinel and the perovskite compound is 1. 1 by weight based on 100 parts by weight of the oxide solid solution powder . It is important to adjust within the range of 0 to 60 parts by weight .
[0018]
When the addition amount is 1% by weight or less, the effect of adding the spinel or perovskite compound does not appear remarkably, and the improvement of the high-temperature heat resistance, which is the object of the present invention, is not seen. , Sinterability is reduced, the resistance value is abnormally high, and high temperature heat resistance is deteriorated.
[0019]
【Example】
Examples of the present invention will be described below.
[0020]
(Example 1) Manganese carbonate, nickel carbonate, cobalt carbonate, and zinc carbonate powders were weighed, each was charged into a ball mill, and mixed for 24 hours. After drying, this was calcined at about 1000 ° C. for 16 hours, and the powder was further mixed and pulverized with a ball mill and then dried to obtain an oxide solid solution powder.
[0021]
On the other hand, AB 2 O 4 is used for the spinel compound, and ABO 3 is used for the perovskite compound.
A compound represented by the following chemical formula was used. In the case of a spinel compound, A: B = 1: 2 in a metal molar ratio, and in the case of a perovskite compound, A: B = 1: 1 in a metal molar ratio, and after calcination at 1000 to 1100 ° C. And pulverization to obtain spinel and perovskite compound powder, respectively.
[0022]
After spinel or perovskite compound powder is wet-mixed in a range of 1 to 60 parts by weight to 100 parts by weight of the oxide powder, a 4 Wt% polyvinyl solution is appropriately added to the dried substance, and the mixture is kneaded into a paste. .
[0023]
The obtained paste is applied to a pair of platinum wires having a diameter of 80 microns stretched at intervals of 250 microns, granulated, dried, and baked at 1250 to 1300 ° C for 1 to 3 hours to form a bead-type thermistor. did.
[0024]
Tables 1 and 2 show typical examples of the thermistors thus manufactured, and FIG. 1 shows the rate of change with time of resistance at 550 ° C.
[0025]
[Table 1]
[0026]
[Table 2]
[0027]
(Example 2) A total of 1 to 60 parts by weight of two or more kinds of compound powders of the compound powder prepared as a spinel compound or a perovskite compound was added to 100 parts by weight of the oxide solid solution powder used in Example 1. After wet mixing within the range, a 4 wt% polyvinyl alcohol solution was added in an appropriate amount to the dried mixture and kneaded into a paste.
[0028]
The paste obtained is applied to a pair of platinum wires having a diameter of 80 microns stretched at intervals of 250 microns, granulated, dried, and fired at 1250 to 1300 ° C for 1 to 3 hours to form a bead-type thermistor. did.
[0029]
Tables 3 and 4 show typical examples of the thermistors thus manufactured, and FIGS.
[0030]
[Table 3]
[0031]
[Table 4]
[0032]
(Example 3) Materials of manganese carbonate, nickel carbonate, cobalt carbonate, zinc carbonate and one selected from aluminum oxide, magnesium carbonate, zirconium oxide, and tin oxide were weighed and mixed for 24 hours by a ball mill. . After drying, this was calcined at about 1000 ° C. for 16 hours, and the powder was further mixed and pulverized with a ball mill and then dried to obtain an oxide solid solution powder.
[0033]
One hundred kinds of the spinel or perovskite compound powder prepared in Example 1 was wet-mixed with 100 parts by weight of this oxide solid solution powder in the range of 1 to 60 parts by weight , and 4 wt% was dried. An appropriate amount of a polyvinyl alcohol solution was added and kneaded into a paste.
[0034]
The obtained paste was applied on a platinum wire having a diameter of 80 μm stretched at intervals of 250 μm, granulated, dried, and fired at 1250 to 1300 ° C. for 1 to 3 hours to form a bead-type thermistor.
[0035]
Table 5 shows a typical example of the thermistor thus manufactured, and FIG. 5 shows the rate of change with time of the resistance value at 550 ° C.
[0036]
[Table 5]
[0037]
(Example 4) A total of 1 to 60 parts by weight of a powder of two or more of the spinel or perovskite compounds prepared in Example 1 was added to 100 parts by weight of the oxide solid solution powder prepared in Example 3 After wet mixing within the range, a 4 wt% polyvinyl alcohol solution was added in an appropriate amount to the dried mixture and kneaded into a paste.
[0038]
The obtained paste is applied to a pair of platinum wires having a diameter of 80 microns stretched at intervals of 250 microns, granulated, dried, and baked at 1250 to 1300 ° C for 1 to 3 hours to form a bead-type thermistor. did.
[0039]
Table 6 shows a typical example of the thermistor thus manufactured, and FIG. 6 shows the rate of change of the resistance value with time at 550 ° C.
[0040]
[Table 6]
[0041]
【The invention's effect】
As described above, the present invention provides an oxide solid solution powder of manganese, nickel, cobalt, zinc and aluminum , magnesium, zirconium , and tin, which are low in resistance at 250 ° C. and excellent in sinterability, and optionally added, Consisting of a mixed sintered body with a spinel compound exhibiting high resistance at ℃ and / or a perovskite compound powder exhibiting low resistance, sintering is possible at a relatively low temperature, small variation, and any resistance value, A temperature coefficient of resistance can be obtained. Particularly, a gas flame temperature used in a temperature range of 400 to 550 ° C., an exhaust gas temperature of an automobile, and a temperature change thermistor have a small rate of change in resistance and have excellent life characteristics. it can.
[Brief description of the drawings]
FIG. 1 is a diagram showing the rate of change in resistance over time in Example 1.
FIG. 2 is a diagram showing a rate of change of a resistance value with time in Example 1.
FIG. 3 is a diagram illustrating a rate of change of a resistance value with time in Example 2.
FIG. 4 is a diagram showing a rate of change of a resistance value with time in Example 2.
FIG. 5 is a diagram showing a rate of change of a resistance value with time in Example 3.
FIG. 6 is a graph showing the rate of change in resistance over time in Example 4.
Claims (4)
酸化物固溶体粉末は、マンガン、ニッケル、コバルト、亜鉛の酸化物固溶体であり、
化合物粉体は、スピネル化合物又はペロブスカイト化合物の内のいずれか一方の化合物の1種類を選択的に含むものであり、
スピネル化合物は、SnAl 2 O 4 ,MnAl 2 O 4 ,MnCr 2 O 4 ,MnTi 2 O 4 ,ZnCr 2 O 4 ,ZnAl 2 O 4 ,ZnTi 2 O 4 ,ZnFe 2 O 4 ,CrAl 2 O 4 ,MgTi 2 O 4 ,MgAl 2 O 4 ,MgMn 2 O 4 ,MgCr 2 O 4 ,FeAl 2 O 4 ,FeCr 2 O 4 ,FeCo 2 O 4 ,CoFe 2 O 4 ,CoAl 2 O 4 ,CoCr 2 O 4 ,NiCr 2 O 4 ,NiAl 2 O 4 であり、
ペロブスカイト化合物は、LaYO 3 ,LaAlO 3 ,YCrO 3 ,YFeO 3 ,CaTiO 3 ,CaSnO 3 ,MgCeO 3 ,BaCeO 3 ,CeAlO 3 ,CeCrO 3 ,CeFeO 3 ,LaTiO 3 ,LaNiO 3 であり、
酸化物固溶体粉末に添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部であることを特徴とする高温用サーミスタ。A high temperature thermistor made of a mixed sintered body of an oxide solid solution powder and a compound powder and used in a temperature range of 400 ° C. to 550 ° C.,
Oxide solid solution powder is an oxide solid solution of manganese, nickel, cobalt, zinc,
Compound powder state, and are not optionally have one either compounds of the spinel compound or perovskite compound,
Spinel compounds include SnAl 2 O 4 , MnAl 2 O 4 , MnCr 2 O 4 , MnTi 2 O 4 , ZnCr 2 O 4 , ZnAl 2 O 4 , ZnTi 2 O 4 , ZnFe 2 O 4 , CrAl 2 O 4 , MgTi 2 O 4, MgAl 2 O 4 , MgMn 2 O 4, MgCr 2 O 4, FeAl 2 O 4, FeCr 2 O 4, FeCo 2 O 4, CoFe 2 O 4, CoAl 2 O 4, CoCr 2 O 4, NiCr 2 O 4 and NiAl 2 O 4 ,
The perovskite compounds are LaYO 3 , LaAlO 3 , YCrO 3 , YFeO 3 , CaTiO 3 , CaSnO 3 , MgCeO 3 , BaCeO 3 , CeAlO 3 , CeCrO 3 , CeFeO 3 , LaTiO 3 , and LaNiO 3 .
A high temperature thermistor characterized in that the amount of the compound powder added to the oxide solid solution powder is 1.0 to 60 parts by weight based on 100 parts by weight of the oxide solid solution powder .
酸化物固溶体粉末は、250℃で低抵抗を示すマンガン、ニッケル、コバルト、亜鉛の酸化物固溶体であり、
化合物粉体は、スピネル化合物又はペロブスカイト化合物の内から選ばれた2種類又はそれ以上の化合物であり、
スピネル化合物は、SnAl 2 O 4 ,MnAl 2 O 4 ,MnCr 2 O 4 ,MnTi 2 O 4 ,ZnCr 2 O 4 ,ZnAl 2 O 4 ,ZnTi 2 O 4 ,ZnFe 2 O 4 ,CrAl 2 O 4 ,MgTi 2 O 4 ,MgAl 2 O 4 ,MgMn 2 O 4 ,MgCr 2 O 4 ,FeAl 2 O 4 ,FeCr 2 O 4 ,FeCo 2 O 4 ,CoFe 2 O 4 ,CoAl 2 O 4 ,CoCr 2 O 4 ,NiCr 2 O 4 ,NiAl 2 O 4 であり、
ペロブスカイト化合物は、LaYO 3 ,LaAlO 3 ,YCrO 3 ,YFeO 3 ,CaTiO 3 ,CaSnO 3 ,MgCeO 3 ,BaCeO 3 ,CeAlO 3 ,CeCrO 3 ,CeFeO 3 ,LaTiO 3 ,LaNiO 3 であり、
酸化物固溶体粉末に添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部であることを特徴とする高温用サーミスタ。A high temperature thermistor made of a mixed sintered body of an oxide solid solution powder and a compound powder and used in a temperature range of 400 ° C. to 550 ° C.,
Oxide solid solution powder is a manganese, nickel, cobalt, zinc oxide solid solution that exhibits low resistance at 250 ° C.
Compound powder, are two kinds or more compounds der selected from among spinel compounds or perovskite compound,
Spinel compounds include SnAl 2 O 4 , MnAl 2 O 4 , MnCr 2 O 4 , MnTi 2 O 4 , ZnCr 2 O 4 , ZnAl 2 O 4 , ZnTi 2 O 4 , ZnFe 2 O 4 , CrAl 2 O 4 , MgTi 2 O 4, MgAl 2 O 4 , MgMn 2 O 4, MgCr 2 O 4, FeAl 2 O 4, FeCr 2 O 4, FeCo 2 O 4, CoFe 2 O 4, CoAl 2 O 4, CoCr 2 O 4, NiCr 2 O 4 and NiAl 2 O 4 ,
The perovskite compounds are LaYO 3 , LaAlO 3 , YCrO 3 , YFeO 3 , CaTiO 3 , CaSnO 3 , MgCeO 3 , BaCeO 3 , CeAlO 3 , CeCrO 3 , CeFeO 3 , LaTiO 3 , and LaNiO 3 .
A high temperature thermistor characterized in that the amount of the compound powder added to the oxide solid solution powder is 1.0 to 60 parts by weight based on 100 parts by weight of the oxide solid solution powder .
酸化物固溶体粉末は、マンガン,ニッケル,コバルト,亜鉛と、アルミニウム,マグネシウム,ジルコニウム,スズの内から選ばれた1種類との酸化物固溶体であり、
化合物粉体は、スピネル化合物又はペロブスカイト化合物の内のいずれか一方の化合物の1種類を選択的に含むものであり、
スピネル化合物は、SnAl 2 O 4 ,MnAl 2 O 4 ,MnCr 2 O 4 ,MnTi 2 O 4 ,ZnCr 2 O 4 ,ZnAl 2 O 4 ,ZnTi 2 O 4 ,ZnFe 2 O 4 ,CrAl 2 O 4 ,MgTi 2 O 4 ,MgAl 2 O 4 ,MgMn 2 O 4 ,MgCr 2 O 4 ,FeAl 2 O 4 ,FeCr 2 O 4 ,FeCo 2 O 4 ,CoFe 2 O 4 ,CoAl 2 O 4 ,CoCr 2 O 4 ,NiCr 2 O 4 ,NiAl 2 O 4 であり、
ペロブスカイト化合物は、LaYO 3 ,LaAlO 3 ,YCrO 3 ,YFeO 3 ,CaTiO 3 ,CaSnO 3 ,MgCeO 3 ,BaCeO 3 ,CeAlO 3 ,CeCrO 3 ,CeFeO 3 ,LaTiO 3 ,LaNiO 3 であり、
酸化物固溶体体粉末に添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部であることを特徴とする高温用サーミスタ。A high temperature thermistor made of a mixed sintered body of an oxide solid solution powder and a compound powder and used in a temperature range of 400 ° C. to 550 ° C.,
The oxide solid solution powder is an oxide solid solution of manganese, nickel, cobalt, zinc, and one selected from aluminum , magnesium, zirconium , and tin,
Compound powder state, and are not optionally have one either compounds of the spinel compound or perovskite compound,
Spinel compounds include SnAl 2 O 4 , MnAl 2 O 4 , MnCr 2 O 4 , MnTi 2 O 4 , ZnCr 2 O 4 , ZnAl 2 O 4 , ZnTi 2 O 4 , ZnFe 2 O 4 , CrAl 2 O 4 , MgTi 2 O 4, MgAl 2 O 4 , MgMn 2 O 4, MgCr 2 O 4, FeAl 2 O 4, FeCr 2 O 4, FeCo 2 O 4, CoFe 2 O 4, CoAl 2 O 4, CoCr 2 O 4, NiCr 2 O 4 and NiAl 2 O 4 ,
The perovskite compounds are LaYO 3 , LaAlO 3 , YCrO 3 , YFeO 3 , CaTiO 3 , CaSnO 3 , MgCeO 3 , BaCeO 3 , CeAlO 3 , CeCrO 3 , CeFeO 3 , LaTiO 3 , and LaNiO 3 .
A high temperature thermistor , wherein the amount of the compound powder added to the oxide solid solution powder is 1.0 to 60 parts by weight based on 100 parts by weight of the oxide solid solution powder .
酸化物固溶体粉末は、マンガン,ニッケル,コバルト,亜鉛と、アルミニウム,マグネシウム,ジルコニウム,スズの内から選ばれた1種類との酸化物固溶体であり、
化合物粉体は、スピネル化合物又はペロブスカイト化合物の内から選ばれた2種類又はそれ以上の化合物であり、
スピネル化合物は、SnAl 2 O 4 ,MnAl 2 O 4 ,MnCr 2 O 4 ,MnTi 2 O 4 ,ZnCr 2 O 4 ,ZnAl 2 O 4 ,ZnTi 2 O 4 ,ZnFe 2 O 4 ,CrAl 2 O 4 ,MgTi 2 O 4 ,MgAl 2 O 4 ,MgMn 2 O 4 ,MgCr 2 O 4 ,FeAl 2 O 4 ,FeCr 2 O 4 ,FeCo 2 O 4 ,CoFe 2 O 4 ,CoAl 2 O 4 ,CoCr 2 O 4 ,NiCr 2 O 4 ,NiAl 2 O 4 であり、
ペロブスカイト化合物は、LaYO 3 ,LaAlO 3 ,YCrO 3 ,YFeO 3 ,CaTiO 3 ,CaSnO 3 ,MgCeO 3 ,BaCeO 3 ,CeAlO 3 ,CeCrO 3 ,CeFeO 3 ,LaTiO 3 ,LaNiO 3 であり、
酸化物固溶体粉末に添加するときの化合物粉体の添加量は、酸化物固溶体粉末100重量部に対し、重量比で1.0〜60重量部であることを特徴とする高温用サーミスタ。A high temperature thermistor made of a mixed sintered body of an oxide solid solution powder and a compound powder and used in a temperature range of 400 ° C. to 550 ° C.,
The oxide solid solution powder is an oxide solid solution of manganese, nickel, cobalt, zinc, and one selected from aluminum , magnesium, zirconium , and tin,
The compound powder is two or more compounds selected from a spinel compound or a perovskite compound,
Spinel compounds include SnAl 2 O 4 , MnAl 2 O 4 , MnCr 2 O 4 , MnTi 2 O 4 , ZnCr 2 O 4 , ZnAl 2 O 4 , ZnTi 2 O 4 , ZnFe 2 O 4 , CrAl 2 O 4 , MgTi 2 O 4, MgAl 2 O 4 , MgMn 2 O 4, MgCr 2 O 4, FeAl 2 O 4, FeCr 2 O 4, FeCo 2 O 4, CoFe 2 O 4, CoAl 2 O 4, CoCr 2 O 4, NiCr 2 O 4 and NiAl 2 O 4 ,
The perovskite compounds are LaYO 3 , LaAlO 3 , YCrO 3 , YFeO 3 , CaTiO 3 , CaSnO 3 , MgCeO 3 , BaCeO 3 , CeAlO 3 , CeCrO 3 , CeFeO 3 , LaTiO 3 , and LaNiO 3 .
A high temperature thermistor characterized in that the amount of the compound powder added to the oxide solid solution powder is 1.0 to 60 parts by weight based on 100 parts by weight of the oxide solid solution powder .
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20914993A JP3569810B2 (en) | 1993-08-24 | 1993-08-24 | High temperature thermistor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20914993A JP3569810B2 (en) | 1993-08-24 | 1993-08-24 | High temperature thermistor |
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| Publication Number | Publication Date |
|---|---|
| JPH0766007A JPH0766007A (en) | 1995-03-10 |
| JP3569810B2 true JP3569810B2 (en) | 2004-09-29 |
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| KR100361310B1 (en) * | 2000-05-25 | 2002-11-18 | (주) 래트론 | Negative Temperature Coefficient Thermistor Device using Spinel Ferrite |
| DE10159451A1 (en) * | 2001-12-04 | 2003-06-26 | Epcos Ag | Electrical component with a negative temperature coefficient |
| CN114394819B (en) * | 2022-02-10 | 2022-11-15 | 广东风华高新科技股份有限公司 | A kind of high-reliability chip NTC thermistor material and its preparation method and application |
| CN115894026B (en) * | 2022-11-29 | 2023-08-08 | 唐山恭成科技有限公司 | NTC thermistor material with low resistivity and high B value and preparation method thereof |
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