JP2907253B2 - High permeability Mn-Zn ferrite - Google Patents
High permeability Mn-Zn ferriteInfo
- Publication number
- JP2907253B2 JP2907253B2 JP5070988A JP7098893A JP2907253B2 JP 2907253 B2 JP2907253 B2 JP 2907253B2 JP 5070988 A JP5070988 A JP 5070988A JP 7098893 A JP7098893 A JP 7098893A JP 2907253 B2 JP2907253 B2 JP 2907253B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- ferrite
- temperature
- magnetic permeability
- mol
- 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
- 230000035699 permeability Effects 0.000 title claims description 20
- 229910000859 α-Fe Inorganic materials 0.000 title claims description 11
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- -1 V 2 O 5 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
Landscapes
- Compounds Of Iron (AREA)
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高透磁率で温度特性の
優れたＭｎ―Ｚｎ系フェライトに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Mn--Zn ferrite having high magnetic permeability and excellent temperature characteristics.
【０００２】[0002]
【従来の技術】高透磁率を有するＭｎ―Ｚｎ系フェライ
トはＦｅ2Ｏ3、ＺｎＯ、ＭｎＯを主成分として構成さ
れ、この主成分に対し、種々の添加物（Ｃａ、Ｓｉ、
Ｖ、Ｂｉ）を加えた材料となっていた。このＭｎ―Ｚｎ
系フェライトは、トランスやノイズフィルタ等の磁心と
して用いられ、高透磁率特性を利用して部品の小型化が
進められている。2. Description of the Related Art Mn--Zn ferrites having high magnetic permeability are mainly composed of Fe 2 O 3 , ZnO, and MnO, and various additives (Ca, Si,
V, Bi). This Mn-Zn
The system ferrite is used as a magnetic core of a transformer, a noise filter, and the like, and the miniaturization of components is being promoted by utilizing high magnetic permeability characteristics.
【０００３】[0003]
【発明が解決しようとする課題】例えばＩＳＤＮのＳ／
Ｔ点インターフェースに使用するパルストランスでは、
その回線側のインダクタンスを２０ｍＨ確保すること
が、ＣＣＩＴＴ Ｉ・４３０に定めるインピーダンスマ
スクを満足するための必須条件となる。ここで、その使
用される機器を考えると、公衆電話や回線終端装置（Ｄ
ＳＵ）のように屋外や軒下に設置されるものが考えら
れ、その環境条件は、ＬＳＩでは現在−１０〜７０℃が
保証されており、同様にパルストランスにおいても温度
保証が必要となる。ところが、従来のＭｎ―Ｚｎ系高透
磁率フェライトの場合、低温側（２０℃以下）で初透磁
率が著しく低下し、この環境条件下で設計すると低温側
でのインピーダンス規格を満足するために、巻数を増や
したり、必要以上に高い透磁率の材料を用いるといった
様に非常に非効率になるという問題点があった。本発明
は、上記の事を鑑みて、高透磁率で温度特性の優れたＭ
ｎ―Ｚｎ系フェライトを得ることを目的とする。For example, ISDN S /
In the pulse transformer used for the T point interface,
Ensuring the line side inductance of 20 mH is an essential condition for satisfying the impedance mask defined in CCITT I.430. Here, considering the equipment used, payphones and line terminating equipment (D
SU) can be installed outdoors or under the eaves, and its environmental conditions are currently guaranteed at -10 to 70 ° C in LSI, and temperature assurance is required for pulse transformers as well. However, in the case of the conventional Mn—Zn-based high permeability ferrite, the initial permeability is remarkably reduced on the low temperature side (20 ° C. or lower), and when designed under this environmental condition, the impedance specification on the low temperature side is satisfied. There is a problem that the efficiency becomes extremely inefficient, such as increasing the number of turns or using a material having a magnetic permeability higher than necessary. In view of the above, the present invention provides a magnetic material having high magnetic permeability and excellent temperature characteristics.
An object is to obtain an n-Zn ferrite.
【０００４】[0004]
【課題を解決するための手段】本発明は、Ｍｎ―Ｚｎ系
フェライトにおいて、Ｆｅ２Ｏ３が５２．５〜５３．０
モル％、ＺｎＯが２２〜２５モル％、残ＭｎＯであり、
副成分としてＣａＯを０．０１〜０．０２重量％、Ｓｉ
Ｏ２を０．０１重量％以下、Ｖ２Ｏ５を０．０５重量％
以下、Ｂｉ２Ｏ３を０．１重量％以下含有し、周波数１
００ｋＨｚにおける初透磁率μｉが温度−２０〜１００
℃の範囲で８０００以上で、かつその変化率が７０％以
内であり、周波数３００ｋＨｚにおけるμｉが温度２０
℃で４０００以上である事を特徴とする高透磁率Ｍｎ―
Ｚｎ系フェライトである。本発明において、主成分を限
定した理由は、Ｆｅ２Ｏ３が５３モル％以上になると初
透磁率μｉの温度特性でセカンダリーピーク（Ｔｓ）が
マイナス側となり、室温付近での初透磁率μｉが８００
０以上を得られない。またＦｅ２Ｏ３が５２．５モル％
以下になるとセカンダリーピークが高温側となりマイナ
ス側でのμｉが８０００以上を得られないからである。SUMMARY OF THE INVENTION The present invention provides a Mn-Zn ferrite, Fe 2 O 3 is from 52.5 to 53.0
Mol%, ZnO is 22 to 25 mol%, and the remaining MnO is
0.01 to 0.02% by weight of CaO as an auxiliary component,
O 2 0.01% by weight or less, V 2 O 5 0.05% by weight
Below, 0.1% by weight or less of Bi 2 O 3 is contained, and frequency 1
The initial magnetic permeability μi at 00 kHz is from −20 to 100
The temperature range is 8000 or more in the range of ° C., the rate of change is within 70%, and μi at a frequency of 300 kHz is 20 ° C.
High magnetic permeability Mn— characterized by being at least 4000 at 100 ° C.
It is a Zn-based ferrite. In the present invention, the reason for limiting the main component is that when Fe 2 O 3 becomes 53 mol% or more, the secondary peak (Ts) becomes negative on the temperature characteristic of the initial magnetic permeability μi, and the initial magnetic permeability μi near room temperature decreases. 800
0 or more cannot be obtained. In addition, 52.5 mol% of Fe 2 O 3
This is because the secondary peak becomes higher on the high temperature side and the μi on the negative side cannot be 8000 or more.
【０００５】[0005]
【実施例】実施例１ Ｆｅ２Ｏ３、ＭｎＯ、ＺｎＯを表１に示す様な主成分組
成をもつ原料を作製し、これを８５０℃で２時間仮焼、
その後ボールミルで８時間粉砕し、リング状に圧縮成形
して１３６０℃で５時間、酸素濃度５％で焼成した。表
１には、異なった主成分組成をもつ試料の周波数１００
ｋＨｚにおける各温度下での初透磁率μｉと温度−２０
から１００℃の範囲におけるμｉの変化率（Δμｉ／μ
ｉ）を示す。また、２０℃でのｔａｎδ／μｉとμｉの
温度特性のセカンダリーピーク（Ｔｓ）も併記する。こ
の表１において、本発明の範囲内のものは実施例とし、
範囲外のものは比較例としている。また、試料Ｎｏ．２
（実施例２）と試料Ｎｏ．１３（比較例５）との初透磁
率μｉの温度に対する変化のグラフを図１に示す。この
図１からもわかるとおり本発明の実施例は、温度に対す
る初透磁率の変化が小さい材料であることがわかる。EXAMPLE 1 A raw material having a main component composition as shown in Table 1 was prepared from Fe 2 O 3 , MnO and ZnO, and calcined at 850 ° C. for 2 hours.
Thereafter, it was pulverized by a ball mill for 8 hours, compression-molded into a ring shape, and fired at 1360 ° C. for 5 hours at an oxygen concentration of 5%. Table 1 shows that the frequency of samples having different main component compositions was 100%.
Initial permeability μi at each temperature at kHz and temperature -20
From 100 to 100 ° C. (Δμi / μ
i) is shown. The secondary peak (Ts) of the temperature characteristics of tan δ / μi and μi at 20 ° C. is also shown. In Table 1, those within the scope of the present invention are examples,
Those outside the range are comparative examples. In addition, the sample No. 2
(Example 2) and Sample No. FIG. 1 shows a graph of the change in the initial magnetic permeability μi with respect to the temperature of Comparative Example 13 (Comparative Example 5). As can be seen from FIG. 1, it can be seen that the example of the present invention is a material having a small change in initial magnetic permeability with temperature.
【０００６】[0006]
【表１】 [Table 1]
【０００７】実施例２ Ｆｅ2Ｏ3 ５２．６モル％、ＭｎＯ ２２．９モル％、
ＺｎＯ ２４．５モル％を主成分とし、これにＣａＯ、
ＳｉＯ2、Ｖ2Ｏ5、Ｂｉ2Ｏ3を表２に示す分量含有する
原料を作製し、これを８５０℃で２時間仮焼、その後ボ
ールミルで８時間粉砕し、リング状に圧縮成形して１３
６０℃で５時間、酸素濃度５％で焼成した。その試料に
ついても実施例１と同様、周波数１００ｋＨｚにおける
各温度下でのμｉとμｉの変化率を表２に示す。また、
周波数３００ｋＨｚにおけるμｉも併記する。表２に示
すように、ＣａＯが０．００５重量％と少なくなると３
００ｋＨｚでのμｉが低下し、４０００以上が得られな
い。又ＳｉＯ 2 が０．０１３重量％と多くなる場合、Ｂ
ｉ 2 Ｏ 3 が０．１２重量％と多くなる場合も同様に、３０
０ｋＨｚでのμｉが低下し、４０００以上を得られなく
なる。 Example 2 52.6 mol% of Fe 2 O 3 , 22.9 mol% of MnO,
24.5 mol% of ZnO as a main component, and CaO,
A raw material containing SiO 2 , V 2 O 5 , and Bi 2 O 3 in the amounts shown in Table 2 was prepared, calcined at 850 ° C. for 2 hours, pulverized by a ball mill for 8 hours, and compression-molded into a ring. 13
Calcination was performed at 60 ° C. for 5 hours at an oxygen concentration of 5%. Table 2 also shows μi and the rate of change of μi at each temperature at a frequency of 100 kHz, as in Example 1. Also,
Μi at a frequency of 300 kHz is also shown. Shown in Table 2
Thus, when CaO is reduced to 0.005% by weight, 3
Μi at 00 kHz decreases, and 4000 or more cannot be obtained.
No. When SiO 2 is increased to 0.013% by weight, B
Similarly, when i 2 O 3 is increased to 0.12% by weight, 30%
Μi at 0 kHz decreases, and 4000 or more cannot be obtained
Become.
【０００８】[0008]
【表２】 [Table 2]
【０００９】[0009]
【発明の効果】本発明によれば、低温側（−２０℃）か
ら高温側（１００℃）まで高い透磁率を有し、しかも、
その温度差で透磁率の変化率が小さいＭｎ―Ｚｎ系フェ
ライトを得ることができる。According to the present invention, the magnetic material has a high magnetic permeability from a low temperature side (−20 ° C.) to a high temperature side (100 ° C.).
A Mn—Zn ferrite having a small rate of change in magnetic permeability due to the temperature difference can be obtained.
【図１】本発明に係る実施例と比較例との初透磁率μｉ
の温度特性である。FIG. 1 shows an initial magnetic permeability μi of an example according to the present invention and a comparative example.
Is the temperature characteristic.
フロントページの続き (56)参考文献 特開 昭61−117804（ＪＰ，Ａ) 特開 昭59−156920（ＪＰ，Ａ) 特開 昭59−223237（ＪＰ，Ａ) 特公 昭52−31555（ＪＰ，Ｂ１) 城阪俊吉 外１名著「エレクトロニク ス材料」（昭和50年３月10日）電気書院 発行、第208，209，232，233頁 太田恵造「磁性材料選択のポイント」 （平成１年11月10日）日本規格協会発 行、第139，140頁Continuation of the front page (56) References JP-A-61-117804 (JP, A) JP-A-59-156920 (JP, A) JP-A-59-223237 (JP, A) JP-B-52-31555 (JP, A) , B1) Toshiyoshi Shirosaka, “Electronics Materials” (March 10, 1975) Published by Denki Shoin, pp. 208, 209, 232, 233 Keizo Ota “Points for Selecting Magnetic Materials” (1991) November 10) Published by the Japan Standards Association, pages 139, 140
Claims (1)
２Ｏ３が５２．５〜５３．０モル％、ＺｎＯが２２〜２
５モル％、残ＭｎＯであり、副成分としてＣａＯを０．
０１〜０．０２重量％、ＳｉＯ ２ を０．０１重量％以
下、Ｖ ２ Ｏ ５ を０．０５重量％以下、Ｂｉ ２ Ｏ ３ を０．
１重量％以下含有し、周波数１００ｋＨｚにおける初透
磁率μｉが温度−２０〜１００℃の範囲で８０００以上
で、かつその変化率が７０％以内であり、周波数３００
ｋＨｚにおけるμｉが温度２０℃で４０００以上である
事を特徴とする高透磁率Ｍｎ―Ｚｎ系フェライト。1. An Mn—Zn ferrite comprising Fe
2 O 3 is from 52.5 to 53.0 mol%, ZnO is 22-2
5 mol%, the remaining MnO, and CaO as a sub-component at 0.1% .
01 to 0.02% by weight, the SiO 2 0.01% by weight or less
Below, V 2 O 5 is 0.05% by weight or less, and Bi 2 O 3 is 0.1% by weight .
1% by weight or less, the initial magnetic permeability μi at a frequency of 100 kHz is 8000 or more in a temperature range of −20 to 100 ° C., and its change rate is within 70%, and a frequency of 300
High permeability Mn-Zn based ferrite characterized in that μi at kHz is 4000 or more at a temperature of 20 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5070988A JP2907253B2 (en) | 1993-03-05 | 1993-03-05 | High permeability Mn-Zn ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5070988A JP2907253B2 (en) | 1993-03-05 | 1993-03-05 | High permeability Mn-Zn ferrite |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8062271A Division JPH09165220A (en) | 1996-03-19 | 1996-03-19 | Manganese-zinc ferrite having high magnetic permeability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06263447A JPH06263447A (en) | 1994-09-20 |
| JP2907253B2 true JP2907253B2 (en) | 1999-06-21 |
Family
ID=13447431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5070988A Expired - Lifetime JP2907253B2 (en) | 1993-03-05 | 1993-03-05 | High permeability Mn-Zn ferrite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2907253B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323279C1 (en) * | 1993-07-12 | 1994-07-14 | Siemens Matsushita Components | Use of highly permeable MnZn ferrites for ferrite cores of inductive components coated with insulating material |
| TW364125B (en) | 1997-03-13 | 1999-07-11 | Tdk Corp | Mn-Zn ferric salt |
| US6773619B2 (en) | 2001-07-17 | 2004-08-10 | Tdk Corporation | Magnetic core for transformer, Mn-Zn based ferrite composition and methods of producing the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5231555A (en) * | 1973-03-02 | 1977-03-10 | Sanyo Electric Co Ltd | Air conditioner |
| JPS59156920A (en) * | 1983-02-21 | 1984-09-06 | Nippon Ferrite Ltd | Magnetic oxide material |
| JPS59223237A (en) * | 1983-05-31 | 1984-12-15 | Tohoku Metal Ind Ltd | Mn-zn ferrite for erasing head core |
| JPS61117804A (en) * | 1984-11-14 | 1986-06-05 | Sumitomo Special Metals Co Ltd | Mn-zn system soft ferrite and manufacture thereof |
-
1993
- 1993-03-05 JP JP5070988A patent/JP2907253B2/en not_active Expired - Lifetime
Non-Patent Citations (2)
| Title |
|---|
| 城阪俊吉 外１名著「エレクトロニクス材料」（昭和５０年３月１０日）電気書院発行、第２０８，２０９，２３２，２３３頁 |
| 太田恵造「磁性材料選択のポイント」（平成１年１１月１０日）日本規格協会発行、第１３９，１４０頁 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06263447A (en) | 1994-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2907253B2 (en) | High permeability Mn-Zn ferrite | |
| EP0445965B1 (en) | Low power loss Mn-Zn ferrites | |
| JPH081844B2 (en) | High frequency low loss ferrite for power supply | |
| JP4404408B2 (en) | High saturation magnetic flux density ferrite material and ferrite core using the same | |
| CN119212963B (en) | MnZn Ferrite | |
| JPH0433755B2 (en) | ||
| JP2802839B2 (en) | Oxide soft magnetic material | |
| JP3245206B2 (en) | Manganese-zinc ferrite | |
| JP3039784B2 (en) | High frequency low loss ferrite for power supply | |
| JPH09165220A (en) | Manganese-zinc ferrite having high magnetic permeability | |
| JP3238735B2 (en) | Manganese-zinc ferrite | |
| JP4436493B2 (en) | High frequency low loss ferrite material and ferrite core using the same | |
| JPH10256025A (en) | Manganese-zinc ferrite | |
| JP2726388B2 (en) | High magnetic permeability high saturation magnetic flux density Ni-based ferrite core and method of manufacturing the same | |
| JPH11302069A (en) | High permeability mn-zn-based ferrite and ferrite core for pulse transformer | |
| JP2510788B2 (en) | Low power loss oxide magnetic material | |
| JPS6119086B2 (en) | ||
| JPH10270231A (en) | Mn-Ni ferrite material | |
| JP2939035B2 (en) | Oxide soft magnetic material | |
| JPH1072217A (en) | High permeability mn-zn ferrite and pulse transformer | |
| JP2731358B2 (en) | Method for producing Mn-Zn ferrite | |
| JP2627676B2 (en) | Manufacturing method of oxide magnetic material | |
| JP2731357B2 (en) | Method for producing Mn-Zn ferrite | |
| JP3617070B2 (en) | Low loss ferrite manufacturing method | |
| JP3487243B2 (en) | Mn-Zn ferrite material |