JP3245206B2 - Manganese-zinc ferrite - Google Patents
Manganese-zinc ferriteInfo
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- JP3245206B2 JP3245206B2 JP03347092A JP3347092A JP3245206B2 JP 3245206 B2 JP3245206 B2 JP 3245206B2 JP 03347092 A JP03347092 A JP 03347092A JP 3347092 A JP3347092 A JP 3347092A JP 3245206 B2 JP3245206 B2 JP 3245206B2
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- ferrite
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、スイッチング電源用ト
ランス等の磁心として好適な電力損失の少ないマンガン
−亜鉛（Ｍｎ−Ｚｎ）系フェライトに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manganese-zinc (Mn-Zn) ferrite having a small power loss and suitable as a magnetic core of a switching power supply transformer or the like.
【０００２】[0002]
【従来の技術】Ｍｎ−Ｚｎ系フェライトは、各種通信機
電源等のコイル、トランス材料として広く用いられてお
り、１００〜２００ｋＨｚの周波数帯域で動作するスイ
ッチング電源のトランス用材料としても利用価値が高
い。かかるトランス材料として使用されるＭｎ−Ｚｎ系
フェライトに要求される特性としては高飽和磁束密度、
高透磁率及び低損失等種々の特性があげられるが、特に
スイッチング電源用トランスについては高磁場下におい
て低損失であることが重要である。2. Description of the Related Art Mn-Zn ferrites are widely used as materials for coils and transformers of various communication power supplies, and are highly useful as transformer materials for switching power supplies operating in a frequency band of 100 to 200 kHz. . Characteristics required for Mn-Zn ferrite used as such a transformer material include high saturation magnetic flux density,
Although various characteristics such as high magnetic permeability and low loss can be given, it is particularly important for a transformer for a switching power supply to have low loss under a high magnetic field.
【０００３】このためＭｎ−Ｚｎ系フェライトにおいて
は、従来から種々の微量成分を添加することによって損
失の低減が試みられている。例えば、特開昭５８−１５
０３７号公報に記載された発明においてはＮｂ2 Ｏ 5 の
添加により、また特開昭６０−１３２３０１号公報に記
載された発明においてはＮｂ2 Ｏ5 、ＣａＯ、ＳｉＯ
2 、Ｖ2 Ｏ5 、ＺｒＯ2 、Ａｌ2 Ｏ3 、ＣｕＯ及びＣｏ
Ｏ等の添加により、現在、スイッチング周波数として標
準的な１００ｋＨｚにおける損失の改善を図っており、
１００ｋＨｚ、２００ｍＴにおけるコアロスとして３５
０〜４００ｍＷ／ｃｍ3 のレベルが実現されている。[0003] Therefore, in Mn-Zn ferrite,
Has conventionally been damaged by the addition of various trace components.
Attempts have been made to reduce losses. For example, JP-A-58-15
No. 037 in the invention describedTwo O Five of
Addition, and as described in JP-A-60-132301.
In the described invention, NbTwo OFive , CaO, SiO
Two , VTwo OFive , ZrOTwo , AlTwo OThree , CuO and Co
With the addition of O, etc.,
We are aiming to improve the loss at the standard 100 kHz,
35 core loss at 100 kHz and 200 mT
0-400mW / cmThree Levels have been realized.
【０００４】[0004]
【発明が解決しようとする課題】ところで最近は、電源
の一層の小型化のために、使用周波数が高周波化（５０
０ｋＨｚ〜１ＭＨｚ）する傾向にあり、その目的にかな
うＭｎ−Ｚｎ系フェライトの開発も進められているが、
これまでは十分な性能を備えたＭｎ−Ｚｎ系フェライト
は開発されていない。例えば市販の電源用低損失フェラ
イトでは、５００ｋＨｚ、１００ｍＴで、せいぜい１０
００ｍＷ／ｃｍ3 程度であり、高周波用電源材料として
は損失が高すぎる。However, recently, in order to further reduce the size of the power supply, the operating frequency has been increased to a higher frequency (50 Hz).
0 kHz to 1 MHz), and the development of Mn—Zn based ferrites for that purpose has been promoted.
Up to now, no Mn-Zn ferrite having sufficient performance has been developed. For example, with a commercially available low-loss ferrite for power supply, at 500 kHz and 100 mT, at most 10
It is about 00 mW / cm 3 , and the loss is too high as a high frequency power supply material.
【０００５】本発明は、上記事情に鑑み、現在スイッチ
ング電源周波数として標準的な１００ｋＨｚよりもさら
に高周波である、例えば５００ｋＨｚ程度もしくはそれ
以上の周波数におけるコアロスが改善されたＭｎ−Ｚｎ
系フェライトを提供することを目的とする。In view of the above circumstances, the present invention provides an Mn-Zn with improved core loss at a frequency higher than the standard switching power supply frequency of 100 kHz, for example, about 500 kHz or more.
An object of the present invention is to provide a system ferrite.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成する本発
明のＭｎ−Ｚｎ系フェライトは、Ｆｅ2 Ｏ3 ５１．５
〜５４．５ｍｏｌ％、ＭｎＯ ３３〜４０ｍｏｌ％及び
ＺｎＯ ６〜１３ｍｏｌ％を基本成分とし、この基本成
分中にＳｉ、Ｃａ、Ｖ、Ｔｉ及びＳｎの酸化物を、それ
ぞれＳｉＯ2 、ＣａＯ、Ｖ2 Ｏ5 、ＴｉＯ2 及びＳｎＯ
2 換算で、それぞれ０．００５〜０．０３５ｗｔ％、
０．０２〜０．２０ｗｔ％、０．００１〜０．０８ｗｔ
％、０．０５〜０．６５ｗｔ％及び０．００５〜０．５
０ｗｔ％含有することを特徴とする。The Mn-Zn ferrite of the present invention, which achieves the above object, comprises Fe 2 O 3 51.5
-54.5 mol%, MnO 33-40 mol%, and ZnO 6-13 mol% as basic components, and oxides of Si, Ca, V, Ti, and Sn in the basic components are SiO 2 , CaO, V 2 O, respectively. 5 , TiO 2 and SnO
0.005 to 0.035 wt% in 2 conversion,
0.02 to 0.20 wt%, 0.001 to 0.08 wt
%, 0.05 to 0.65 wt% and 0.005 to 0.5
It is characterized by containing 0 wt%.
【０００７】[0007]
【作用】１００ｋＨｚを超える高周波領域での損失の低
減策として、比抵抗を高めるためにＳｎＯ2 を添加する
試みは従来から実施されているが、例えば特開昭６１−
２５２６０９号公報では、ＳｉＯ2 ，ＣａＯに加え多量
のＳｎＯ2 （０．５〜０．９ｗｔ％）を含有させること
で低損失化が図られている。また、特公昭５１−４８２
７６号公報や特開昭６０−２６２４０４号公報のよう
に、ＳｎＯ2 の添加量は比較的少ないがＳｉＯ2 を添加
しない場合にも低損失が実現された例がある。As an attempt to reduce the loss in the high-frequency region exceeding 100 kHz, an attempt to add SnO 2 to increase the specific resistance has been conventionally made.
In Japanese Patent No. 252609, the loss is reduced by including a large amount of SnO 2 (0.5 to 0.9 wt%) in addition to SiO 2 and CaO. In addition, Japanese Patent Publication No. 51-482
As disclosed in Japanese Patent Application Laid-Open No. 76-262404 and Japanese Patent Application Laid-Open No. Sho 60-262404, there is an example in which the addition amount of SnO 2 is relatively small but low loss is realized even when SiO 2 is not added.
【０００８】しかし、ＳｉＯ2 とＣａＯの共存下でＶ2
Ｏ5 ，ＴｉＯ2 ，ＳｎＯ2 を含有させ、しかもＳｎＯ2
の添加量が比較的少ない場合に損失の低減が図られた例
はなく、本発明者はこの範囲においてもＭｎ−Ｚｎ系フ
ェライトの磁気特性に関して鋭意研究を重ねた結果、優
れた磁気特性が得られることを見出した。すなわち、本
発明では、ＳｉＯ2 、ＣａＯ、Ｖ2 Ｏ5 、ＴｉＯ2 及び
ＳｎＯ2を同時に含有させ、各成分を粒界あるいは粒内
に分散させることにより比抵抗を高め、上記高周波領域
における損失の低減化が可能となった。さらに、ＳｎＯ
2の含有量が極微量であって、比抵抗の上昇効果がほと
んど認められない場合にも磁気特性が改善されることが
明らかになった。However, in the presence of SiO 2 and CaO, V 2
O 5 , TiO 2 and SnO 2 are contained, and SnO 2
There is no example in which the loss was reduced when the addition amount of manganese was relatively small, and the present inventor conducted intensive studies on the magnetic properties of Mn-Zn ferrite even in this range, and as a result, excellent magnetic properties were obtained. Was found to be. That is, in the present invention, SiO 2 , CaO, V 2 O 5 , TiO 2, and SnO 2 are simultaneously contained, and the specific resistance is increased by dispersing each component in a grain boundary or in a grain, thereby reducing the loss in the high-frequency region. Reduction has become possible. Furthermore, SnO
It was found that the magnetic properties were improved even when the content of 2 was very small and the effect of increasing the specific resistance was hardly recognized.
【０００９】ここで、本発明において、基本成分の配合
割合を前記の範囲に限定した理由について説明する。ス
イッチング電源用トランスは、通常の動作温度が６０〜
７０℃なので、この温度範囲で電力損失が低く、かつ室
温から動作温度を超える８０〜１２０℃程度の温度域ま
で電力損失が負の温度依存性をもつことが望ましい。こ
こでトランス・コアに使用されるＭｎ−Ｚｎ系フェライ
トの電力損失の温度依存性は、主成分であるＦｅ2 Ｏ
3 、ＭｎＯ及びＺｎＯの配合比によってほぼ決まる一定
温度（Ｔ s ）で極小値を示す、下に凸の曲線で表わされ
る。上記の理由からＴs を８０〜１２０℃に設定するこ
とが好ましいが、Ｆｅ2 Ｏ3 が５１．５ｍｏｌ％未満で
且つＭｎＯが４０ｍｏｌ％を超える場合はＴs が高くな
り過ぎ、トランスの動作温度での電力損失が増大する。
一方、Ｆｅ2 Ｏ3 が５４．５ｍｏｌ％を超え且つＭｎＯ
が３３ｍｏｌ％未満の場合はＴs が８０℃を下回り、室
温から動作温度までの範囲で損失の負の温度依存性が得
られなくなる。この観点からＦｅ2 Ｏ3 、ＭｎＯ、Ｚｎ
Ｏの配合割合を検討した結果、上記の範囲、即ち、 Ｆｅ2 Ｏ3 ：５１．５〜５４．５ｍｏｌ％ ＭｎＯ：３３〜４０ｍｏｌ％ ＺｎＯ：６〜１３ｍｏｌ％ が得られた。Here, in the present invention, the blending of the basic components
The reason why the ratio is limited to the above range will be described. S
The switching power supply transformer has a normal operating temperature of 60 to
70 ° C, low power loss in this temperature range and room
Temperature to a temperature range of about 80 to 120 ° C, which exceeds the operating temperature.
It is desirable that the power loss has a negative temperature dependence. This
Mn-Zn ferrite used in transformer core
The temperature dependence of the power loss ofTwo O
Three , MnO and constant determined substantially by the mixing ratio of ZnO
Temperature (T s ) Indicates the minimum value and is represented by a downward convex curve.
You. T for the above reasons Should be set to 80 to 120 ° C.
Is preferred, but FeTwo OThree Is less than 51.5 mol%
And when MnO exceeds 40 mol%, Ts Is expensive
Power loss at the operating temperature of the transformer.
On the other hand, FeTwo OThree Exceeds 54.5 mol% and MnO
Is less than 33 mol%, Ts Is below 80 ℃
Negative temperature dependence of loss over temperature to operating temperature
Can not be. From this viewpoint, FeTwo OThree , MnO, Zn
As a result of studying the mixing ratio of O, the above range, namely, FeTwo OThree : 51.5 to 54.5 mol% MnO: 33 to 40 mol% ZnO: 6 to 13 mol% was obtained.
【００１０】また本発明は、上記主成分中に、ＳｉＯ
2 、ＣａＯ，Ｖ2 Ｏ5 、ＴｉＯ2 及びＳｎＯ2 を含有さ
せたところに特徴がある。以下にこれらの微量添加成分
の配合割合の限定理由を説明する。 （１） ＳｉＯ2 を０．００５〜０．０３５ｗｔ％に限
定した理由 ＳｉＯ2 はＣａＯとの共存によって粒界の比抵抗を高
め、渦電流損の低減に有効に寄与するが、含有量が０．
００５ｗｔ％未満では比抵抗が低下してその効果に乏し
く、一方、０．０３５ｗｔ％を超えると異常粒組織とな
って電力損失が上昇し不適当なので、０．００５〜０．
０３５ｗｔ％の範囲に限定した。なおＳｉＯ2 が原料中
に不純物として数１０ｐｐｍ含まれる場合には、全体で
０．００５〜０．０３５ｗｔ％の範囲に入るように添加
量を調整する。[0010] The present invention also relates to the present invention, wherein SiO 2 is contained in the main component.
It is characterized by containing 2 , CaO, V 2 O 5 , TiO 2 and SnO 2 . The reasons for limiting the mixing ratio of these trace addition components will be described below. (1) Reason for limiting SiO 2 to 0.005 to 0.035 wt% SiO 2 increases the specific resistance of the grain boundary due to coexistence with CaO and effectively contributes to the reduction of eddy current loss, but the content is 0. .
If the content is less than 005 wt%, the specific resistance is lowered and the effect is poor. On the other hand, if the content is more than 0.035 wt%, an abnormal grain structure is formed and the power loss increases, which is inappropriate.
The range was limited to 035 wt%. When SiO 2 is contained as an impurity in the raw material by several tens ppm, the addition amount is adjusted so as to fall within the range of 0.005 to 0.035 wt% as a whole.
【００１１】（２） ＣａＯを０．０２〜０．２０ｗｔ
％に限定した理由 ＣａＯは、ＳｉＯ2 との共存下で効果的に粒界抵抗を高
め、低損失をもたらす有用成分であるが、含有量が０．
０２ｗｔ％未満の場合は粒界抵抗の上昇効果に乏しく渦
電流損失が増大する。一方、０．２０ｗｔ％を超えると
電力損失が非常に大きくなるので０．０２〜０．２０ｗ
ｔ％の範囲とした。(2) CaO of 0.02 to 0.20 wt.
% CaO is a useful component that effectively enhances grain boundary resistance and causes low loss in the presence of SiO 2 , but has a content of 0.1%.
When the content is less than 02 wt%, the effect of increasing the grain boundary resistance is poor and the eddy current loss increases. On the other hand, if it exceeds 0.20% by weight, the power loss becomes very large.
t% range.
【００１２】（３） Ｖ2 Ｏ5 を０．００１〜０．０８
ｗｔ％に限定した理由 Ｖ2 Ｏ5 は、粒界抵抗を高め、損失の低減に有効であ
る。また、この効果はＳｉＯ2 やＣａＯ、さらにはＴｉ
Ｏ2 及びＳｎＯ2 の共存下で一層顕著なものとなる。し
かし、０．００１ｗｔ％未満ではこの効果が乏しく、一
方、０．０８ｗｔ％を超えると異常粒成長を起こし電力
損失が大幅に上昇するので０．００１〜０．０８ｗｔ％
の範囲に限定した。(3) V 2 O 5 is 0.001 to 0.08
Reasons for limiting to wt% V 2 O 5 is effective for increasing grain boundary resistance and reducing loss. In addition, this effect is achieved by SiO 2 and CaO, and furthermore by Ti
It becomes more remarkable in the coexistence of O 2 and SnO 2 . However, when the content is less than 0.001 wt%, this effect is poor. On the other hand, when the content exceeds 0.08 wt%, abnormal grain growth occurs, and the power loss is greatly increased.
Limited to the range.
【００１３】（４） ＴｉＯ2 を０．０５〜０．６５ｗ
ｔ％に限定した理由 ＴｉＯ2 は、フェライトコア焼成時の冷却過程での粒界
の再酸化を促進し、更に粒内にも固溶してフェライトコ
アの比抵抗を高める効果がある。また焼結密度を高める
効果があり、その結果、残留磁束密度、保磁力が小さく
なる。しかし、０．０５ｗｔ％未満ではその効果が低
く、一方、０．６５ｗｔ％を超えると逆に電力損失の上
昇を招く。そこで０．０５〜０．６５ｗｔ％に限定し
た。(4) TiO 2 is 0.05 to 0.65 w
Reasons for limiting to t% TiO 2 has the effect of promoting the reoxidation of the grain boundaries during the cooling process during firing of the ferrite core, and further increasing the specific resistance of the ferrite core by forming a solid solution in the grains. In addition, there is an effect of increasing the sintering density, and as a result, the residual magnetic flux density and the coercive force decrease. However, if the content is less than 0.05 wt%, the effect is low. Therefore, the content is limited to 0.05 to 0.65 wt%.
【００１４】（５） ＳｎＯ2 を０．００５〜０．５０
ｗｔ％に限定した理由 ＳｎＯ2 は、ＴｉＯ2 と同様にフェライトコアの比抵抗
を高め、渦電流損失を低下させる効果があるが、ＳｎＯ
2 含有量が０．１ｗｔ％未満ではその効果に乏しく、一
方、０．５０ｗｔ％を越えると逆に電力損失が大きくな
る。また、本効果に乏しい０．１ｗｔ％未満であって
も、０．００５ｗｔ％以上添加すると電力損失が著しく
低下することが判明した。この場合の損失低減機構を明
確に示すことはできないが、多成分系の異質な相が結晶
粒界に存在することによる磁気的な悪影響をＳｎＯ2 が
緩和するためと考えられる。以上の理由によってこの範
囲に限定した。(5) 0.005 to 0.50 of SnO 2
Reason for limiting to wt% SnO 2 has the effect of increasing the specific resistance of the ferrite core and reducing the eddy current loss, as in the case of TiO 2.
2 If the content is less than 0.1 wt%, the effect is poor, while if it exceeds 0.50 wt%, the power loss increases. It was also found that even if the effect is poor and less than 0.1 wt%, the addition of 0.005 wt% or more significantly reduces the power loss. Although the loss reduction mechanism in this case cannot be clearly shown, it is considered that SnO 2 alleviates the adverse magnetic effect caused by the presence of a multi-component heterogeneous phase at the crystal grain boundary. For this reason, the range is limited to this range.
【００１５】なお、本発明のマンガン−亜鉛系フェライ
トを製造するには、各粉末原料を所定の組成になるよう
に混合、仮焼、粉砕した後、常法に従い圧縮成形し次い
で焼結を施せばよい。その際、前記の微量成分の添加
は、混合時及び／又は粉砕時に行なわれる。また、これ
らの微量成分は酸化物に限定されず、例えば炭酸塩やし
ゅう酸塩のように上記フェライトの製造過程において最
終的に酸化物へ変化する化合物であればよい。In order to produce the manganese-zinc ferrite of the present invention, the respective powdery raw materials are mixed, calcined, and pulverized so as to have a predetermined composition, and then subjected to compression molding and sintering according to a conventional method. I just need. At that time, the addition of the above-mentioned trace components is performed at the time of mixing and / or pulverization. Further, these trace components are not limited to oxides, and may be, for example, compounds such as carbonates and oxalates that finally change to oxides in the ferrite production process.
【００１６】[0016]
【実施例】以下、本発明の実施例について説明する。Ｆ
ｅ2 Ｏ3 ：５２．５ｍｏｌ％、ＭｎＯ：３５．７ｍｏｌ
％、ＺｎＯ：１１．８ｍｏｌ％から成る基本組成の原料
を混合後、仮焼し、粉砕したフェライト粉体に表１及び
表２に示す割合で、ＳｉＯ2 、ＣａＯ（ＣａＣＯ3 を使
用）、Ｖ2 Ｏ 5 、ＴｉＯ2 、ＳｎＯ2 を複合添加配合し
た。その後、リング型に成形し、本焼成した。こうして
得られた試料の、５００ｋＨｚ，１００ｍＴ，８０℃に
おけるコアロスを表１、表２に併記した。Embodiments of the present invention will be described below. F
eTwo OThree : 52.5 mol%, MnO: 35.7 mol
%, A raw material having a basic composition of ZnO: 11.8 mol%
Was mixed, calcined, and pulverized ferrite powder was added to Table 1 and
In the ratio shown in Table 2, SiOTwo , CaO (CaCOThree use
For), VTwo O Five , TiOTwo , SnOTwo Is compounded and compounded
Was. Then, it was formed into a ring shape and fired. In this way
500 kHz, 100 mT, 80 ° C of the obtained sample
Table 1 and Table 2 also show the core loss.
【００１７】表１は、本発明の実施例を示す表であり、
表２は本発明添加物組成の限定範囲外の比較例を示す表
である。本発明によれば、５００ｋＨｚという高い周波
数において低いコアロスが得られる。Table 1 shows an embodiment of the present invention.
Table 2 is a table showing comparative examples outside the limited range of the additive composition of the present invention. According to the present invention, a low core loss can be obtained at a frequency as high as 500 kHz.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】図１は、表１の試料番号２の本発明材と従
来の電源用フェライト（「従来材」と記す）の周波数５
００ｋＨｚ、磁束密度１００ｍＴの条件下で測定したコ
アロスの温度特性を示したグラフである。この図より、
本発明材は２０℃から１２０℃までの全ての温度範囲に
おいて、コアロスが従来材よりも著しく改善されている
ことがわかる。FIG. 1 shows the frequency 5 of the material of the present invention of Sample No. 2 in Table 1 and the conventional ferrite for power supply (hereinafter referred to as “conventional material”).
It is the graph which showed the temperature characteristic of the core loss measured on conditions of 00 kHz and magnetic flux density of 100 mT. From this figure,
It can be seen that the material of the present invention has significantly improved core loss over the entire temperature range from 20 ° C. to 120 ° C. as compared with the conventional material.
【００２１】図２は、温度８０℃、磁束密度１００ｍＴ
の場合のコアロスの周波数特性を、上記と同じ表１の試
料番号２の本発明材と従来材について示したグラフであ
る。この図より、周波数が２００ｋＨｚ以上ならば、コ
アロスは従来材よりも改善されることがわかる。FIG. 2 shows a temperature of 80 ° C. and a magnetic flux density of 100 mT.
7 is a graph showing the frequency characteristics of the core loss in the case of Example 1 and the material of the present invention and the conventional material of Sample No. 2 in Table 1 same as above. From this figure, it can be seen that if the frequency is 200 kHz or more, the core loss is improved as compared with the conventional material.
【００２２】[0022]
【発明の効果】以上のように、本発明はＦｅ2 Ｏ3 が５
１．５〜５４．５ｍｏｌ％、ＭｎＯが３３〜４０ｍｏｌ
％、ＺｎＯが６〜１３ｍｏｌ％を基本成分とし、この基
本成分中にＳｉＯ2 を０．００５〜０．０３５ｗｔ％、
ＣａＯを０．０２〜０．２０ｗｔ％、Ｖ2 Ｏ5 を０．０
０１〜０．０８ｗｔ％、ＴｉＯ2 を０．０５〜０．６５
ｗｔ％、ＳｎＯ2 を０．００５〜０．５０ｗｔ％含有す
るようにしたので、高周波領域でのコアロスが著しく低
いＭｎ−Ｚｎ系フェライトが得られた。これにより、高
周波電源の磁心等に使用でき電源の効率化、小型化に有
効となる。As described above, according to the present invention, when Fe 2 O 3 is 5
1.5 to 54.5 mol%, MnO is 33 to 40 mol
%, ZnO is 6 to 13 mol% as a basic component, and in this basic component, 0.005 to 0.035 wt% of SiO 2 is contained.
CaO and 0.02~0.20wt%, V 2 O 5 0.0
01~0.08wt%, the TiO 2 0.05~0.65
wt%, since the SnO 2 as containing 0.005~0.50wt%, the core loss in the high frequency range is obtained is significantly lower Mn-Zn ferrite. As a result, it can be used for a magnetic core of a high-frequency power supply or the like, which is effective for increasing the efficiency and reducing the size of the power supply.
【図１】本発明材と従来材のコアロスの温度特性を示し
たグラフである。FIG. 1 is a graph showing temperature characteristics of core loss of a material of the present invention and a conventional material.
【図２】本発明材と従来材のコアロスの周波数特性を示
したグラフである。FIG. 2 is a graph showing frequency characteristics of core loss of a material of the present invention and a conventional material.
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 1/12 - 1/375 Continuation of front page (58) Field surveyed (Int.Cl. 7 , DB name) H01F 1/12-1/375
Claims (1)
％、ＭｎＯ ３３〜４０ｍｏｌ％及びＺｎＯ ６〜１３
ｍｏｌ％を基本成分とし、この基本成分中にＳｉ、Ｃ
ａ、Ｖ、Ｔｉ及びＳｎの酸化物を、それぞれＳｉＯ2 、
ＣａＯ、Ｖ2 Ｏ 5 、ＴｉＯ2 及びＳｎＯ2 換算で、それ
ぞれ０．００５〜０．０３５ｗｔ％、０．０２〜０．２
０ｗｔ％、０．００１〜０．０８ｗｔ％、０．０５〜
０．６５ｗｔ％及び０．００５〜０．５０ｗｔ％含有す
ることを特徴とするマンガン−亜鉛系フェライト。1. FeTwo OThree 51.5-54.5 mol
%, MnO 33-40 mol% and ZnO 6-13
mol% as a basic component, and Si, C
The oxides of a, V, Ti and Sn are each converted to SiO 2Two ,
CaO, VTwo O Five , TiOTwo And SnOTwo In conversion, it
0.005 to 0.035 wt%, 0.02 to 0.2 respectively
0 wt%, 0.001-0.08 wt%, 0.05-
Contains 0.65 wt% and 0.005 to 0.50 wt%
Manganese-zinc ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03347092A JP3245206B2 (en) | 1992-02-20 | 1992-02-20 | Manganese-zinc ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03347092A JP3245206B2 (en) | 1992-02-20 | 1992-02-20 | Manganese-zinc ferrite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05234737A JPH05234737A (en) | 1993-09-10 |
| JP3245206B2 true JP3245206B2 (en) | 2002-01-07 |
Family
ID=12387436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03347092A Expired - Fee Related JP3245206B2 (en) | 1992-02-20 | 1992-02-20 | Manganese-zinc ferrite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3245206B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107162580A (en) * | 2017-05-08 | 2017-09-15 | 中国计量大学 | High mechanical properties MnZn Ferrite Materials |
| CN113185275A (en) * | 2021-04-23 | 2021-07-30 | 麦格磁电科技（珠海）有限公司 | Preparation method of ultrahigh Bs low-loss manganese-zinc ferrite material for cloud computing |
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1992
- 1992-02-20 JP JP03347092A patent/JP3245206B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05234737A (en) | 1993-09-10 |
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