JP3242731B2 - Low loss oxide magnetic material - Google Patents
Low loss oxide magnetic materialInfo
- Publication number
- JP3242731B2 JP3242731B2 JP05099893A JP5099893A JP3242731B2 JP 3242731 B2 JP3242731 B2 JP 3242731B2 JP 05099893 A JP05099893 A JP 05099893A JP 5099893 A JP5099893 A JP 5099893A JP 3242731 B2 JP3242731 B2 JP 3242731B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic material
- oxide magnetic
- loss
- low loss
- ferrite
- 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 - Fee Related
Links
- 239000000696 magnetic material Substances 0.000 title claims description 13
- 229910000859 α-Fe Inorganic materials 0.000 claims description 11
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- VASIZKWUTCETSD-UHFFFAOYSA-N oxomanganese Chemical compound [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910007541 Zn O Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
- Magnetic Ceramics (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は新規な低損失酸化物磁性
材料、特にスイッチング電源トランス等に用いるに好適
な低損失酸化物磁性材料に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel low-loss oxide magnetic material, and more particularly to a low-loss oxide magnetic material suitable for use in a switching power supply transformer or the like.
【０００２】[0002]
【従来の技術と解決しようとする課題】近年、スイッチ
ング電源の小型化、軽量化のためスイッチング周波数が
１００ｋＨｚ以上の高周波に移行してきた。このような
高周波化のもとでは従来の成分を有する酸化物磁性材料
はもはや低い損失（コアロス）を維持できなくなってい
る。2. Description of the Related Art In recent years, switching frequencies have shifted to higher frequencies of 100 kHz or more in order to reduce the size and weight of switching power supplies. Under such a high frequency, an oxide magnetic material having a conventional component can no longer maintain a low loss (core loss).
【０００３】この種の酸化物磁性材料として酸化第二鉄
（Ｆｅ２Ｏ３）、酸化亜鉛（ＺｎＯ）、および一酸化マ
ンガン（ＭｎＯ）を主成分とするＭｎ‐Ｚｎフェライト
が従来から知られており、これに各種副成分を添加して
磁気特性や機械的特性の改善が図られている。たとえば
かかるＭｎ‐Ｚｎフェライトに酸化カルシウム（Ｃａ
Ｏ）と二酸化ケイ素（ＳｉＯ２）を添加しフェライトの
抵抗率を高めることにより、損失の改善がはかられてい
るがまだ十分ではない（特公平４−５７６２８号公
報）。又かかるフェライトに副成分としてＮａとＣａを
夫々０．０１〜０．５重量％含有させたものも公知であ
る（特開昭５９−６７６１０号公報）。この場合は高い
周波数での実効透磁率の向上が図られているが、損失の
改善は図られていない。[0003] Mn-Zn ferrite mainly composed of ferric oxide (Fe 2 O 3 ), zinc oxide (ZnO) and manganese monoxide (MnO) has been known as this type of oxide magnetic material. In addition, various sub-components are added to these materials to improve magnetic characteristics and mechanical characteristics. For example, a calcium oxide (Ca
By adding O) and silicon dioxide (SiO 2 ) to increase the resistivity of ferrite, the loss is improved, but it is not yet sufficient (Japanese Patent Publication No. 4-57628). Further, a ferrite containing 0.01 to 0.5% by weight of each of Na and Ca as subcomponents in such a ferrite is also known (JP-A-59-67610). In this case, the effective magnetic permeability at a high frequency is improved, but the loss is not improved.
【０００４】従って従来の酸化物磁性材料ではもはや低
損失を維持できなくなっており、電力損失の増大による
発熱のため周辺部品を損傷させてしまう可能性が大きく
なっている。[0004] Therefore, the conventional oxide magnetic material can no longer maintain a low loss, and the possibility of damaging peripheral components due to heat generation due to an increase in power loss has increased.
【０００５】本発明は、このような事情に鑑み、スイッ
チング電源の小型化、高周波化に対応して、１００ＫＨ
ｚ以上の高周波でも電力損失の小さい酸化物磁性材料を
提供することを目的とするものである。[0005] In view of such circumstances, the present invention has been developed to reduce the size of switching power supplies and increase the frequency of switching power supplies.
It is an object of the present invention to provide an oxide magnetic material having a small power loss even at a high frequency of z or more.
【０００６】[0006]
【課題を解決するための手段】よって、本発明は主成分
としてＦｅ２Ｏ３５０〜５６ｍｏｌ％、ＺｎＯ５〜２０
ｍｏｌ％、残部がＭｎＯからなるＭｎ‐Ｚｎフェライト
に、副成分としてＣａＯ０．０４〜０．１０ｗｔ％、Ｓ
ｉＯ２０．００５〜０．１５ｗｔ％、ＨｆＯ２０．０１
〜０．４０ｗｔ％、Ｎａ０．０００５〜０．００３０ｗ
ｔ％を含むことを特徴とする低損失酸化物磁性材料を提
供するものである。Means for Solving the Problems] Accordingly, the present invention is Fe 2 O 3 50~56mol% as a main component, ZnO5～20
mol%, the balance being Mn-Zn ferrite consisting of MnO, CaO 0.04 to 0.10 wt%
iO 2 0.005 to 0.15 wt%, HfO 2 0.01
~ 0.40wt%, Na0.0005 ~ 0.0030w
An object of the present invention is to provide a low-loss oxide magnetic material containing t%.
【０００７】本発明に係る酸化物磁性材料はＭｎ‐Ｚｎ
フェライトに上記のような副成分を含有するものであ
り、それらの副成分の中、Ｃａイオン以外は、殆ど粒界
層に存在し、内部に入らず、高抵抗な粒界を形成してい
る。この粒界のガラス質相はカルシウムシリケートが主
成分であるが溶融できるイオンは取りこむことができ
る。詳細は明らかでないが、Ｈｆイオンの存在はガラス
質相の粘度（イオン半径）、ガラス質相の酸化状態（原
子価）をより望ましいものにすると考えられている。又
Ｎａイオンはガラス質相の融点を下げる役割をし、より
低温からガラス質相の均一な粒界拡散を助けるものと思
われる。尚Ｎａは金属ナトリウム、酸化物（酸化ナトリ
ウム）、炭酸塩（炭酸ナトリウム）などとして添加する
ことができる。The oxide magnetic material according to the present invention is Mn-Zn
Ferrite contains the above-mentioned sub-components, and among these sub-components, except for Ca ions, almost exists in the grain boundary layer, does not enter the inside, and forms a high-resistance grain boundary. . Although the glassy phase at the grain boundaries is mainly composed of calcium silicate, ions that can be melted can be taken in. Although the details are not clear, it is believed that the presence of Hf ions makes the viscosity (ionic radius) of the glassy phase and the oxidation state (valence) of the glassy phase more desirable. Also, it is considered that Na ions serve to lower the melting point of the vitreous phase and help uniform diffusion of the vitreous phase from the lower temperature. Na can be added as metal sodium, oxide (sodium oxide), carbonate (sodium carbonate) and the like.
【０００８】Ｍｎ‐Ｚｎフェライト材料に上記の如き副
成分を所定の重量％加えるとき３００ＫＷ／ｍ3 又はそ
れ以下の低い損失を有する磁性材料を得ることができる
のである。各成分の一つを欠くとき又は含有量を所定範
囲以下又は以上とするときは損失が高くなって不適当で
ある。[0008] When the above-mentioned auxiliary component is added to the Mn-Zn ferrite material in a predetermined weight%, a magnetic material having a low loss of 300 KW / m 3 or less can be obtained. When one of the components is missing or when the content is less than or greater than a predetermined range, the loss increases and it is inappropriate.
【０００９】この磁性材料を製造するに当っては主成分
としてＦｅ２Ｏ３、ＺｎＯ，ＭｎＯを含む通常の乾式法
で作成した粗いＭｎ‐Ｚｎフェライト仮焼粉に夫々副成
分材料を所定量加えて更に水を加えて、乾燥、粉砕、造
粒をした後、所定寸法のドーナッツ乃至トロイダル状に
成形して１２５０℃、３％Ｏ２の条件下で約３時間焼結
を行なう。その際７００℃までは毎時１００℃の速度で
昇温し、それから１２５０℃までは緻密化を図るため
０．１％Ｏ２の雰囲気下に保ち毎時３００℃の速度で昇
温させるのが好ましい。焼結後は９００℃まで毎時７５
℃、９００℃以下は毎時３００℃で冷却する。７００℃
までの昇温時、焼結後の冷却時は窒素乃至不活性雰囲気
に保たれる。In producing this magnetic material, predetermined amounts of subcomponent materials are added to coarse Mn-Zn ferrite calcined powder prepared by a usual dry method containing Fe 2 O 3 , ZnO and MnO as main components. After further adding water, drying, pulverizing and granulating, the mixture is shaped into a donut or toroidal shape having a predetermined size, and sintered at 1250 ° C. and 3% O 2 for about 3 hours. At that time, the temperature is preferably increased at a rate of 100 ° C./hour up to 700 ° C., and then maintained at an atmosphere of 0.1% O 2 at a rate of 300 ° C./hour for densification up to 1250 ° C. 75 hours after sintering up to 900 ° C
C., 900 ° C. or less is cooled at 300 ° C./hour. 700 ° C
During the heating up to, and during the cooling after sintering, the atmosphere is kept in a nitrogen or inert atmosphere.
【００１０】[0010]
【実施例】Ｆｅ２Ｏ３５３．３ｍｏｌ％、ＺｎＯ１０．
０ｍｏｌ％、Ｍｎ３６．７ｍｏｌ％を主成分として含む
通常の乾式法で作成したＭｎ‐Ｚｎフェライト仮焼粉に
夫々所定量のＣａＣＯ３、ＳｉＯ２、ＨｆＯ２、Ｎａ２
ＣＯ３を加えて２５ケの試料Ａ〜Ｔをつくる。水を加
え、乾燥、粉砕、造粒後、トロイダル（外径約２５mm）
状に成形し、１２５０℃、３％Ｏ２の条件下に３時間焼
結を行なった。緻密化のため７００〜１２５０℃までの
昇温中は０．１％Ｏ２の雰囲気を保った。昇温時、降温
時の速度は上記のとおりであった。えられた各材料の組
成（ｗｔ％）と損失（Ｐｃ（ＫＷ／ｍ3 ）をまとめて示
せば表１のとおりである。尚損失は１００ｋＨｚ、２０
０ｍＴ（ミリテスラ）、１００℃のときの値である。こ
の表において、本発明の範囲内のものを実施例、範囲以
外のものを比較例と示した。EXAMPLE 53.3 mol% of Fe 2 O 3 , ZnO 10.
Predetermined amounts of CaCO 3 , SiO 2 , HfO 2 , and Na 2 were added to the Mn—Zn ferrite calcined powder prepared by a normal dry method containing 0 mol% and Mn 36.7 mol% as main components.
Adding CO 3 make 25 Quai samples A to T. Add water, dry, pulverize, granulate, and then toroidal (outer diameter about 25 mm)
And sintered at 1250 ° C. and 3% O 2 for 3 hours. During the heating up to 700 to 1250 ° C., the atmosphere of 0.1% O 2 was maintained for densification. The rates of temperature rise and temperature fall were as described above. The obtained composition (wt%) and loss (Pc (KW / m 3 )) of each material are shown in Table 1. The loss is 100 kHz, 20
The values are at 0 mT (millitesla) and 100 ° C. In this table, those within the scope of the present invention are shown as examples, and those outside the scope are shown as comparative examples.
【００１１】[0011]
【表１】 [Table 1]
【００１２】[0012]
【発明の効果】上記実施例及び表１の結果から明らかな
ように本発明に従って、主成分としてＦｅ２Ｏ３、Ｚｎ
Ｏ、ＭｎＯを含むＭｎ‐Ｚｎフェライトに副成分として
ＣａＯ、ＳｉＯ２、ＨｆＯ２及びＮａの４種類を夫々所
定量加えたもの（実施例）は、それらの一つを欠いたも
の、又は所定量の範囲外加えたもの（比較例）と異な
り、１００ＫＨｚ以上での実用に耐えうる３００ＫＷ／
ｍ3 又はそれ以下という低い損失の酸化物磁性材料を得
ることができ、スイッチング電源の小型化、軽量化そし
て高周波化によく対応することができる。As is clear from the above examples and the results shown in Table 1, according to the present invention, Fe 2 O 3 , Zn
O, CaO as secondary component Mn-Zn ferrite containing MnO, SiO 2, HfO 2 and plus a predetermined amount each of four kinds of Na (example), that lack one of them, or a predetermined amount (Comparative example), which can withstand practical use at 100 KHz or more.
An oxide magnetic material having a low loss of m 3 or less can be obtained, and it is possible to cope with a reduction in size, weight, and frequency of a switching power supply.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−135711（ＪＰ，Ａ) 特開 平２−124724（ＪＰ，Ａ) 特開 平４−93003（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 1/12 - 1/375 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-135711 (JP, A) JP-A-2-124724 (JP, A) JP-A-4-93003 (JP, A) (58) Field (Int.Cl. 7 , DB name) H01F 1/12-1/375
Claims (1)
％、ＺｎＯ５〜２０ｍｏｌ％、残部がＭｎＯからなるＭ
ｎ‐Ｚｎフェライトに、副成分としてＣａＯ０．０４〜
０．１０ｗｔ％、ＳｉＯ２０．００５〜０．１５ｗｔ
％、ＨｆＯ２０．０１〜０．４０ｗｔ％、Ｎａ０．００
０５〜０．００３０ｗｔ％を含むことを特徴とする低損
失酸化物磁性材料。(1) 50 to 56 mol of Fe 2 O 3 as a main component
%, ZnO 5 to 20 mol%, the balance being MnO
CaO 0.04 to n-Zn ferrite
0.10wt%, SiO 2 0.005~0.15wt
%, HfO 2 0.01 to 0.40 wt%, Na 0.00
A low-loss oxide magnetic material containing 0.05 to 0.0030 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05099893A JP3242731B2 (en) | 1993-03-11 | 1993-03-11 | Low loss oxide magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05099893A JP3242731B2 (en) | 1993-03-11 | 1993-03-11 | Low loss oxide magnetic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06267728A JPH06267728A (en) | 1994-09-22 |
| JP3242731B2 true JP3242731B2 (en) | 2001-12-25 |
Family
ID=12874464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05099893A Expired - Fee Related JP3242731B2 (en) | 1993-03-11 | 1993-03-11 | Low loss oxide magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3242731B2 (en) |
-
1993
- 1993-03-11 JP JP05099893A patent/JP3242731B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06267728A (en) | 1994-09-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |