JPH0658762B2 - Capacitor - Google Patents
CapacitorInfo
- Publication number
- JPH0658762B2 JPH0658762B2 JP59025437A JP2543784A JPH0658762B2 JP H0658762 B2 JPH0658762 B2 JP H0658762B2 JP 59025437 A JP59025437 A JP 59025437A JP 2543784 A JP2543784 A JP 2543784A JP H0658762 B2 JPH0658762 B2 JP H0658762B2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric constant
- dielectric
- binder
- capacitor
- composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 title claims description 6
- 239000011230 binding agent Substances 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000002131 composite material Substances 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 239000003989 dielectric material Substances 0.000 description 3
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 2
- 229910002113 barium titanate Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 125000001731 2-cyanoethyl group Chemical group [H]C([H])(*)C([H])([H])C#N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920001218 Pullulan Polymers 0.000 description 1
- 239000004373 Pullulan Substances 0.000 description 1
- SMEGJBVQLJJKKX-HOTMZDKISA-N [(2R,3S,4S,5R,6R)-5-acetyloxy-3,4,6-trihydroxyoxan-2-yl]methyl acetate Chemical compound CC(=O)OC[C@@H]1[C@H]([C@@H]([C@H]([C@@H](O1)O)OC(=O)C)O)O SMEGJBVQLJJKKX-HOTMZDKISA-N 0.000 description 1
- 229940081735 acetylcellulose Drugs 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 235000019423 pullulan Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Inorganic Insulating Materials (AREA)
- Organic Insulating Materials (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、高誘電率の無機粉体をプラスチック中に分散
した複合物を誘電体としたコンデンサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor having a dielectric material which is a composite of a high dielectric constant inorganic powder dispersed in plastic.
従来例の構成とその問題点 従来より、チタン酸バリウム系や酸化チタン系などの高
誘電率の無機粉体を適当なプラスチック中に分散するこ
とにより、高誘電率の複合誘電体を得ることは知られて
いる。そして、これらのプラスチックの材料としては、
主にポリエステル、ポリカーボネート、エポキシ、アセ
チルセルロース、ポリ塩化ビニリデン、ポリフッ化ビニ
リデンなどが用いられてきた。これらの誘電率はいずれ
も、２５℃、１ＫＨｚで１４より小さい。Structure of Conventional Example and Its Problems Conventionally, it has been difficult to obtain a composite dielectric material having a high dielectric constant by dispersing an inorganic powder having a high dielectric constant such as barium titanate or titanium oxide in an appropriate plastic. Are known. And as materials for these plastics,
Polyester, polycarbonate, epoxy, acetyl cellulose, polyvinylidene chloride, polyvinylidene fluoride, etc. have been mainly used. All of these dielectric constants are smaller than 14 at 25 ° C. and 1 KHz.
しかるに、近年、コンデンサ部品に対する小形化の要求
から、さらに高耐電圧の複合誘電体の開発が望まれてき
た。However, in recent years, due to the demand for miniaturization of capacitor parts, it has been desired to develop a composite dielectric having a higher withstand voltage.
発明の目的 本発明は、バインダとして用いるプラスチックの誘電率
を１４〜２０にすることにより、複合誘電体の高耐電圧
を実現せんとするものである。OBJECT OF THE INVENTION The present invention is to realize a high withstand voltage of a composite dielectric by adjusting the dielectric constant of plastic used as a binder to 14 to 20.
発明の構成 そのための構成として本発明は誘電率が１４〜２０のプ
ラスチックのバインダ中に誘電率が１００以上の酸化チ
タンを１０〜９０Vol％含有した複合物を誘電体として 作 用 本発明は未だ十分には解明されていないが、バインダの
誘電率が１４以上で、複合誘電体の微視的な絶縁破壊形
態がステップ的に変化するものと考えられる。すなわ
ち、誘電率による電圧分担の関係から、低誘電率のバイ
ンダの場合には、バインダ自体の破壊が全体の破壊を支
配するのに対して、１４以上の高誘電率の場合には、粉
体結晶自体の破壊（貫通破壊）が全体の破壊を支配する
こととなり高耐電圧化に結びついているものと考えられ
る。Constitution of the invention As a constitution therefor, the present invention uses a composite containing 10 to 90 Vol% of titanium oxide having a dielectric constant of 100 or more in a binder of plastic having a dielectric constant of 14 to 20. The present invention is still sufficient. Although it has not been clarified yet, it is considered that when the dielectric constant of the binder is 14 or more, the microscopic dielectric breakdown pattern of the composite dielectric changes stepwise. That is, from the relationship of voltage sharing by the permittivity, in the case of a binder having a low permittivity, the destruction of the binder itself controls the overall destruction, whereas in the case of a binder having a high permittivity of 14 or more, the powder is It is considered that the breakdown of the crystal itself (penetration breakdown) governs the entire breakdown, leading to higher withstand voltage.
実施例の説明 本発明で用いるプラスチックとしては、シアノエチル化
プルラン（ＣＥＰ）やシアノエチル化セルロース（ＣＥ
Ｃ）などが適当である。誘電率はシアノエチル基置換度
により異なるが、代表的な値としてはいずれも１５〜２
０（２５℃、１ＫＨｚ）である。それぞれの構造式を以
下に示す。Description of Examples Examples of the plastic used in the present invention include cyanoethylated pullulan (CEP) and cyanoethylated cellulose (CE
C) and the like are suitable. Dielectric constant depends on the degree of cyanoethyl group substitution, but typical values are 15 to 2
0 (25 ° C., 1 KHz). The respective structural formulas are shown below.
また無機粉体としては、酸化チタンなどの高誘電率無機
粉体（誘電率：１００〜２５００程度が適当）が用いら
れ、高誘電率を得る観点から１０Vol％以上が必要であ
り、また十分バインダが作用するために９０Vol％以下
の含有率が望ましい。 Further, as the inorganic powder, a high dielectric constant inorganic powder such as titanium oxide (dielectric constant: about 100 to 2,500 is suitable) is used, and 10 vol% or more is necessary from the viewpoint of obtaining a high dielectric constant. Is desirable, the content of 90 Vol% or less is desirable.
以下実施例を用いて具体的に説明する。This will be specifically described below with reference to examples.
比較例１ 表１表に示すような複合誘電体のフィルム（厚さ：５μ
ｍ）を作り、これを誘電体としてコンデンサ（0.5μ
Ｆ）を構成して、直流電圧でコンデンサの破壊試験を実
施した。Comparative Example 1 A film of a composite dielectric as shown in Table 1 (thickness: 5 μ
m) and use this as a dielectric (0.5μ)
F) was constructed and a destructive test of the capacitor was carried out with a DC voltage.
粉体としては、平均粒径が0.8μｍのチタン酸バリウム
（誘電率：２５００）を用いた。含有率は４０Vol％で
ある。第１表に示す通り、バインダの誘電率が１４より
小さい場合、耐電圧の低下が少し見られるが、破壊電圧
レベルは全体に小さなものであった。As the powder, barium titanate having an average particle size of 0.8 μm (dielectric constant: 2500) was used. The content rate is 40 Vol%. As shown in Table 1, when the dielectric constant of the binder was smaller than 14, the breakdown voltage was slightly decreased, but the breakdown voltage level was small as a whole.
実施例１ 酸化チタン（誘電率：１４０）を用いて同様の検討をし
た。平均粒径は0.3μｍで、含有率は６０Vol％である。
第２表と図面に示すように、１４以上の誘電率のバイン
ダと酸化チタンを用いることにより飛躍的に耐電圧が向
上することがわかった。 Example 1 Similar examination was performed using titanium oxide (dielectric constant: 140). The average particle size is 0.3 μm and the content rate is 60 Vol%.
As shown in Table 2 and the drawings, it was found that the use of a binder having a dielectric constant of 14 or more and titanium oxide significantly improved the withstand voltage.
実施例以外にも種々の誘電率のバインダを用いて結果が
得られたが、それらをまとめて図面に示す。一方、誘電
率が１００より小さい無機粉体を用いた場合は、この効
果は小さかった。 The results were obtained by using binders having various dielectric constants other than the examples, which are collectively shown in the drawing. On the other hand, when an inorganic powder having a dielectric constant of less than 100 was used, this effect was small.
発明の効果 以上のように本発明により、高耐電圧で高誘電率の複合
誘電体が実現でき、コンデンサの小形化、高性能化の面
で寄与するところ大なるものがある。EFFECTS OF THE INVENTION As described above, according to the present invention, a composite dielectric material having a high withstand voltage and a high dielectric constant can be realized, which greatly contributes to miniaturization and high performance of a capacitor.
図はバインダの誘電率に対する破壊電圧の特性図であ
る。The figure is a characteristic diagram of the breakdown voltage with respect to the dielectric constant of the binder.
Claims (1)
ンダ中に誘電率が１００以上の酸化チタンを１０〜９０
Vol％含有した複合物を誘電体としたコンデンサ。1. A plastic binder having a dielectric constant of 14 to 20 containing 10 to 90 titanium oxide having a dielectric constant of 100 or more.
A capacitor that uses a compound containing Vol% as a dielectric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59025437A JPH0658762B2 (en) | 1984-02-14 | 1984-02-14 | Capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59025437A JPH0658762B2 (en) | 1984-02-14 | 1984-02-14 | Capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60170103A JPS60170103A (en) | 1985-09-03 |
| JPH0658762B2 true JPH0658762B2 (en) | 1994-08-03 |
Family
ID=12165965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59025437A Expired - Lifetime JPH0658762B2 (en) | 1984-02-14 | 1984-02-14 | Capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0658762B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01245059A (en) * | 1988-03-27 | 1989-09-29 | Matsushita Electric Works Ltd | Shapeable highly dielectric thermosetting composition |
| JP4861800B2 (en) * | 2006-11-27 | 2012-01-25 | Ｓｒｉスポーツ株式会社 | shoes |
| US20100202100A1 (en) * | 2007-07-31 | 2010-08-12 | Daikin Industries ,Ltd. | Highly dielectric film |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS526966A (en) * | 1975-07-08 | 1977-01-19 | Matsushita Electric Industrial Co Ltd | Capacitor |
| JPS58166609A (en) * | 1982-03-27 | 1983-10-01 | ダイキン工業株式会社 | Composite dielectric |
| JPS59917A (en) * | 1982-06-25 | 1984-01-06 | 信越化学工業株式会社 | Film condenser |
-
1984
- 1984-02-14 JP JP59025437A patent/JPH0658762B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60170103A (en) | 1985-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2695239A (en) | Barium titanate capacitors | |
| GB2123400A (en) | Dielectric ceramic composition | |
| JPH0658762B2 (en) | Capacitor | |
| Venigalla | ADVANCED MATERIALS & POWDERS DIGEST. BARIUM TITANATE(BaTiO 3) | |
| JPH08239266A (en) | Ceramic dielectric composition and its production | |
| JPS5939723A (en) | Manufacture of dielectric powder for thick film | |
| JPS5939725A (en) | Manufacture of dielectric powder for thick film | |
| JPS6159714A (en) | Composite dielectric capacitor | |
| JPS5986103A (en) | High dielectric constant porcelain composition | |
| JPS5815078A (en) | High dielectric constant ceramic dielectric composition | |
| JPS623770B2 (en) | ||
| JP2619675B2 (en) | Dielectric porcelain composition | |
| KR940004144B1 (en) | Dielectric Self Composition | |
| JPS6366008B2 (en) | ||
| JPS6051205B2 (en) | High dielectric constant porcelain composition | |
| JPS6051202B2 (en) | High dielectric constant porcelain composition | |
| JPS6258128B2 (en) | ||
| JP3457714B2 (en) | Dielectric porcelain composition | |
| JPS5963605A (en) | High dielectric constant porcelain dielectric composition | |
| JP3385626B2 (en) | Dielectric porcelain composition | |
| KR0157326B1 (en) | Ceramic component for condenser | |
| JPH0629140B2 (en) | Piezoelectric element material and manufacturing method thereof | |
| JPS6122507A (en) | Dielectric porcelain composition | |
| JPS6258129B2 (en) | ||
| JP3000821B2 (en) | Manufacturing method of ceramic capacitor |