JPH05226136A - Low-loss oxide magnetic material - Google Patents
Low-loss oxide magnetic materialInfo
- Publication number
- JPH05226136A JPH05226136A JP4030362A JP3036292A JPH05226136A JP H05226136 A JPH05226136 A JP H05226136A JP 4030362 A JP4030362 A JP 4030362A JP 3036292 A JP3036292 A JP 3036292A JP H05226136 A JPH05226136 A JP H05226136A
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- JP
- Japan
- Prior art keywords
- oxide
- weight
- magnetic material
- loss
- oxide magnetic
- 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.)
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- Compounds Of Iron (AREA)
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，低損失酸化物磁性材料
に関し，特に主成分として一酸化マンガン（ＭｎＯ），
酸化亜鉛（ＺｎＯ），及び残部酸化第二鉄（Ｆｅ
2 Ｏ3 ）を含み，副成分として酸化カルシウム（Ｃａ
Ｏ）及び酸化ケイ素（ＳｉＯ2 ）を含む低損失酸化物磁
性材料の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low loss oxide magnetic material, and in particular to manganese monoxide (MnO) as a main component,
Zinc oxide (ZnO), and the balance ferric oxide (Fe
2 O 3 ) and calcium oxide (Ca
O) and silicon oxide (SiO 2 ).
【０００２】[0002]
【従来の技術】従来，スイッチング電源用の変圧器にお
いては，スイッチング周波数として専ら５０〜２００kH
z 程度のものが使用されており，これに対応すべき低損
失酸化物磁性材料として，主成分として３０〜４０モル
％の一酸化マンガン（ＭｎＯ），５〜１５モル％の酸化
亜鉛（ＺｎＯ），及び残部として酸化第二鉄（Ｆｅ2 Ｏ
3 ）を含み，副成分として０．０２〜０．５重量％の酸
化カルシウム（ＣａＯ）及び０．００５〜０．１００重
量％の酸化ケイ素（ＳｉＯ2 ）を含むものがすでに開発
されている。2. Description of the Related Art Conventionally, a transformer for a switching power supply has a switching frequency of 50 to 200 kHz.
A low-loss oxide magnetic material to be used for this purpose is used as a main component of 30-40 mol% manganese monoxide (MnO) and 5-15 mol% zinc oxide (ZnO). , And the balance of ferric oxide (Fe 2 O
3 ) and containing 0.02 to 0.5% by weight of calcium oxide (CaO) and 0.005 to 0.100% by weight of silicon oxide (SiO 2 ) as subcomponents have already been developed.
【０００３】[0003]
【発明が解決しようとする課題】スイッチング電源は装
置の小型・軽量化の要求から益々，スイッチング周波数
が高くなり，MHz 帯での低損失化が要求されている。と
ころが従来の成分を有する低損失酸化物磁性材料をMHz
帯のスイッチング周波数を用いる電源用変圧器の磁芯材
料として使用すると鉄損が大きく発熱するという欠点が
あった。The switching power supply is required to have a smaller and lighter device, and thus the switching frequency becomes higher and lower loss in the MHz band is required. However, conventional low-loss oxide magnetic materials with
When it is used as a magnetic core material of a power supply transformer that uses a band switching frequency, there is a drawback that iron loss is large and heat is generated.
【０００４】従って，本発明の技術的課題は，MHz 帯の
スイッチング周波数で使用しても，鉄損を小さくできる
酸化物磁性材料を提供することにある。Therefore, a technical object of the present invention is to provide an oxide magnetic material capable of reducing iron loss even when used at a switching frequency in the MHz band.
【０００５】[0005]
【課題を解決するための手段】本発明は，主成分として
３０〜４０モル％の一酸化マンガン（ＭｎＯ），５〜１
５モル％の酸化亜鉛（ＺｎＯ）及び残部酸化第二鉄（Ｆ
ｅ2 Ｏ3 ）を含み，副成分として０．０２〜０．１５重
量％の酸化カルシウム（ＣａＯ）及び０．００５〜０．
１００重量％の酸化ケイ素（ＳｉＯ2 ）を含む酸化物磁
性材料に，添加物として１．００重量％以下（０重量％
を含まず）の二酸化ハフニウム（ＨｆＯ2 ），０．３０
重量％以下（０重量％を含まず）の五酸化ニオブ（Ｎｂ
2 Ｏ5 ）及び０．３０重量％以下（０重量％を含まず）
の五酸化バナジウム（Ｖ2 Ｏ5 ）を含有することを特徴
とする低損失酸化物磁性材料が得られる。ここで，本発
明において，添加物として１．００重量％以下（０重量
％を含まず）の二酸化ハフニウム（ＨｆＯ2 ），０．３
０重量％以下（０重量％を含まず）の五酸化ニオブ（Ｎ
ｂ2 Ｏ5 ）及び０．３０重量（０重量％を含まず）の五
酸化バナジウム（Ｖ2 Ｏ5 ）と限定したのは，この範囲
を越えると結晶粒の異常成長が認められ，比抵抗が劣化
し，電力損失の値が大きくなるからである。According to the present invention, the main component is 30 to 40 mol% of manganese monoxide (MnO), 5 to 1
5 mol% zinc oxide (ZnO) and the balance ferric oxide (F
e 2 O 3 ), 0.02 to 0.15% by weight of calcium oxide (CaO) and 0.005 to 0.
An oxide magnetic material containing 100 wt% of silicon oxide (SiO 2 ) is added as an additive in an amount of 1.00 wt% or less (0 wt%
Hafnium dioxide (HfO 2 ), 0.30
Weight% or less (not including 0% by weight) niobium pentoxide (Nb
2 O 5 ) and 0.30% by weight or less (not including 0% by weight)
A low loss oxide magnetic material characterized by containing vanadium pentoxide (V 2 O 5 ) is obtained. Here, in the present invention, as an additive, 1.00% by weight or less (not including 0% by weight) of hafnium dioxide (HfO 2 ), 0.3
0 wt% or less (not including 0 wt%) niobium pentoxide (N
b 2 O 5) and was restricted with 0.30 weight (0 not include the weight%) five vanadium oxide (V 2 O 5) is the abnormal grain growth was observed to exceed this range, the resistivity Is deteriorated and the value of power loss increases.
【０００６】[0006]
【作用】本発明の低損失酸化物磁性材料においては，一
酸化マンガン（ＭｎＯ），酸化亜鉛（ＺｎＯ）及び酸化
第二鉄（Ｆｅ7 Ｏ3 ）を主成分とし，この主成分に，酸
化カルシウム（ＣａＯ）及び酸化ケイ素（ＳｉＯ2 ）の
副成分と，二酸化ハフニウム（ＨｆＯ2 ），五酸化ニオ
ブ（Ｎｂ2 Ｏ5 ），五酸化バナジウム（Ｖ2 Ｏ5）の添
加物とを適量複合添加含有したもので各副成分及び添加
物を結晶粒界に析出し粒界の比抵抗を著しく高め，うず
電流損失を大きく低減でき，とくにMHz 帯での周波数領
域でも充分な低損失特性を実現できる。また，本発明の
低損失酸化物磁性材料においては，室温から約１００℃
までの温度範囲で鉄損が最も低くなる様に設定でき，実
際に高周波電源用の磁芯として使用時の鉄損を少なくし
得る。In the low loss oxide magnetic material of the present invention, manganese monoxide (MnO), zinc oxide (ZnO) and ferric oxide (Fe 7 O 3 ) are the main components, and calcium oxide is the main component. (CaO) and silicon oxide (SiO 2 ) as sub-components, and hafnium dioxide (HfO 2 ), niobium pentoxide (Nb 2 O 5 ), and vanadium pentoxide (V 2 O 5 ) additives in appropriate amounts With these components, each subcomponent and additive are precipitated at the crystal grain boundaries, the resistivity of the grain boundaries is significantly increased, and the eddy current loss can be greatly reduced, and sufficient low loss characteristics can be realized especially in the frequency range in the MHz band. Further, in the low loss oxide magnetic material of the present invention, room temperature to about 100 ° C.
The iron loss can be set to be the lowest in the temperature range up to, and the iron loss when actually used as a magnetic core for a high frequency power supply can be reduced.
【０００７】[0007]
【実施例】以下，本発明の実施例について説明する。EXAMPLES Examples of the present invention will be described below.
【０００８】５３．０モル％の酸化第二鉄（Ｆｅ
2 Ｏ3 ），３９．０モル％の一酸化マンガン（ＭｎＯ）
及び８．０モル％の酸化亜鉛（ＺｎＯ）を主成分として
含有し，副成分として０．０３０重量％の二酸化ケイ素
（ＳｉＯ2 ）及び０．１００重量％の酸化カルシウム
（ＣａＯ）を含有し，さらに添加物として酸化ハフニウ
ム（ＨｆＯ2 ），五酸化ニオブ（Ｎｂ2 Ｏ5 ），及び五
酸化バナジウム（Ｖ2 Ｏ5 ）を添加し，これらを混合造
粒し，成形プレスした後，窒素ガス雰囲気中の酸素濃度
５．０ vol％，焼結温度１１００〜１３００℃の範囲の
最適温度で焼結し，酸化物磁性材料を得た。この酸化物
磁性材料の各副成分及び添加物の添加量と周波数１MHz
，磁束密度５００ガウス（Ｇ），温度８０℃における
電力損失（鉄損）の値を下記の表１に示す。53.0 mol% ferric oxide (Fe
2 O 3 ), 39.0 mol% manganese monoxide (MnO)
And 8.0 mol% zinc oxide (ZnO) as a main component, 0.030 wt% silicon dioxide (SiO 2 ) and 0.100 wt% calcium oxide (CaO) as sub-components, Hafnium oxide (HfO 2 ), niobium pentoxide (Nb 2 O 5 ), and vanadium pentoxide (V 2 O 5 ) were further added as additives, and these were mixed and granulated, molded and pressed, and then subjected to a nitrogen gas atmosphere. The oxide magnetic material was obtained by sintering at an optimum temperature in the range of oxygen concentration of 5.0 vol% and sintering temperature of 1100-1300 ° C. Addition amount and frequency of each subcomponent and additive of this oxide magnetic material 1MHz
Table 1 below shows the values of power loss (iron loss) at a magnetic flux density of 500 gauss (G) and a temperature of 80 ° C.
【０００９】[0009]
【表１】 [Table 1]
【００１０】表１から，二酸化ハフニウム（ＨｆＯ2 ）
五酸化ニオブ（Ｎｂ2 Ｏ5 ），五酸化バナジウム（Ｖ2
Ｏ5 ）の複合添加によって電力損失は従来材（No．１）
に比べて低い値を示し，最適複合添加量（No．７）にお
いては，従来材に対し約６０％電力損失を低減可能であ
ることが判明した。また，酸化ハフニウム（ＨｆＯ2）
１．１０重量％添加試料（No．８），五酸化ニオブ（Ｎ
ｂ2 Ｏ5 ）０．４０重量％添加試料（No．９），五酸化
バナジウム（Ｖ2 Ｏ5 ）０．４０重量％添加試料（No．
１０）においては結晶粒に異常粒成長が認められ，比抵
抗ρも劣化し電力損失の値が大きくなっている。From Table 1, hafnium dioxide (HfO 2 )
Niobium pentoxide (Nb 2 O 5 ), vanadium pentoxide (V 2
Power loss due to the combined addition of O 5 ) is the same as that of the conventional material (No. 1)
It showed a lower value than that of, and it was found that at the optimum combined addition amount (No. 7), the power loss could be reduced by about 60% compared with the conventional material. Also, hafnium oxide (HfO 2 )
1.10 wt% added sample (No. 8), niobium pentoxide (N
b 2 O 5 ) 0.40 wt% added sample (No. 9), vanadium pentoxide (V 2 O 5 ) 0.40 wt% added sample (No. 9).
In 10), abnormal grain growth was observed in the crystal grains, the specific resistance ρ also deteriorated, and the value of power loss increased.
【００１１】また，下記の表２には，実施例における試
料番号７と従来材（試料番号１）について，初透磁率μ
i ，飽和磁束密度Ｂ15，残留磁束密度Ｂr ，保持力
Ｈc ，比抵抗ρの値を示す。本発明の実施例により材料
の比抵抗は従来材の約２０倍と高い値となっている。Table 2 below shows the initial magnetic permeability μ of the sample No. 7 in the example and the conventional material (Sample No. 1).
Values of i , saturation magnetic flux density B 15 , residual magnetic flux density B r , coercive force H c , and specific resistance ρ are shown. According to the embodiment of the present invention, the specific resistance of the material is as high as about 20 times that of the conventional material.
【００１２】[0012]
【表２】 [Table 2]
【００１３】[0013]
【発明の効果】以上の説明で明らかな様に，本発明で
は，酸化物磁性材料に酸化ハフニウム（ＨｆＯ2 ），五
酸化ニオブ（Ｎｂ2 Ｏ5 ），及び五酸化バナジウム（Ｖ
2 Ｏ5 ）を適量複合添加することにより，スイッチング
電源用材料として求められる諸特性を十分に満足すると
ともに，周波数１MHz の高周波において，従来のものよ
り電力の損失を低減できる低損失酸化物磁性材料を提供
でき，高周波磁芯用材料として好適であり，変圧器の小
型化−軽量化を図ることができる。As is apparent from the above description, according to the present invention, hafnium oxide (HfO 2 ), niobium pentoxide (Nb 2 O 5 ), and vanadium pentoxide (V
A low-loss oxide magnetic material that can satisfy various characteristics required as a material for a switching power supply by adding an appropriate amount of 2 O 5 ) and reduce power loss at a high frequency of 1 MHz compared to conventional materials. It is suitable as a material for a high frequency magnetic core, and can reduce the size and weight of a transformer.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 千葉 哲義 宮城県仙台市太白区郡山六丁目７番１号 株式会社トーキン内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuyoshi Chiba 6-7-1, Koriyama, Taichiro-ku, Sendai-shi, Miyagi Tokin Co., Ltd.
Claims (1)
マンガン（ＭｎＯ），５〜１５モル％の酸化亜鉛（Ｚｎ
Ｏ）及び残部酸化第二鉄（Ｆｅ2 Ｏ3 ）を含み，副成分
として０．０２〜０．１５重量％の酸化カルシウム（Ｃ
ａＯ）及び０．００５〜０．１００重量％の酸化ケイ素
（ＳｉＯ2 ）を含む酸化物磁性材料に，添加物として
１．００重量％以下（０重量％を含まず）の二酸化ハフ
ニウム（ＨｆＯ2 ），０．３０重量％以下（０重量％を
含まず）の五酸化ニオブ（Ｎｂ2Ｏ5 ）及び０．３０重
量％（０重量％を含まず）の五酸化バナジウム（Ｖ2 Ｏ
5）を含有することを特徴とする低損失酸化物磁性材
料。1. A main component of 30 to 40 mol% manganese monoxide (MnO) and 5 to 15 mol% of zinc oxide (Zn).
O) and the balance ferric oxide (Fe 2 O 3 ) and 0.02 to 0.15% by weight of calcium oxide (C
aO) and 0.005 to 0.100% by weight of silicon oxide (SiO 2 ) in an oxide magnetic material containing 1.00% by weight or less (not including 0% by weight) of hafnium dioxide (HfO 2 ) as an additive. ), 0.30% by weight or less (not including 0% by weight) niobium pentoxide (Nb 2 O 5 ) and 0.30% by weight (not including 0% by weight) vanadium pentoxide (V 2 O)
5 ) A low-loss oxide magnetic material containing:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03036292A JP3554983B2 (en) | 1992-02-18 | 1992-02-18 | Low-loss oxide magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03036292A JP3554983B2 (en) | 1992-02-18 | 1992-02-18 | Low-loss oxide magnetic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05226136A true JPH05226136A (en) | 1993-09-03 |
| JP3554983B2 JP3554983B2 (en) | 2004-08-18 |
Family
ID=12301757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03036292A Expired - Lifetime JP3554983B2 (en) | 1992-02-18 | 1992-02-18 | Low-loss oxide magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3554983B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116217214A (en) * | 2022-12-30 | 2023-06-06 | 马鞍山新康达磁业有限公司 | Ultrahigh-temperature low-loss manganese zinc ferrite material and preparation method thereof |
-
1992
- 1992-02-18 JP JP03036292A patent/JP3554983B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116217214A (en) * | 2022-12-30 | 2023-06-06 | 马鞍山新康达磁业有限公司 | Ultrahigh-temperature low-loss manganese zinc ferrite material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3554983B2 (en) | 2004-08-18 |
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