JPH0779043B2 - Mn-Zn ferrite - Google Patents
Mn-Zn ferriteInfo
- Publication number
- JPH0779043B2 JPH0779043B2 JP4084563A JP8456392A JPH0779043B2 JP H0779043 B2 JPH0779043 B2 JP H0779043B2 JP 4084563 A JP4084563 A JP 4084563A JP 8456392 A JP8456392 A JP 8456392A JP H0779043 B2 JPH0779043 B2 JP H0779043B2
- Authority
- JP
- Japan
- Prior art keywords
- khz
- weight
- magnetic permeability
- ferrite
- frequency
- 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
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、高透磁率で低損失なＭ
ｎ―Ｚｎ系フェライトを提供することを目的とする。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to M having high magnetic permeability and low loss.
It is an object to provide an n-Zn ferrite.
【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（Ｂｉ、Ｃａ、
Ｖ）を加えた材料となっていた。2. Description of the Related Art Mn--Zn type ferrite having a high magnetic permeability is mainly composed of Fe2O3, ZnO and MnO, and various additives (Bi, Ca,
It was a material to which V) was added.
【０００３】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。This Mn--Zn type ferrite is used as a magnetic core of a transformer, a noise filter, etc., and miniaturization of parts is being promoted by utilizing its high magnetic permeability characteristics.
【０００４】[0004]
【発明が解決しようとする課題】例えばノイズフィルタ
用の磁心として、高周波（〜５００ｋＨｚ）まで高い透
磁率を有する材料の要求が強まってきた。For example, as a magnetic core for a noise filter, there has been an increasing demand for a material having a high magnetic permeability up to a high frequency (up to 500 kHz).
【０００５】ところが、従来のＭｎ―Ｚｎ系フェライト
の場合、透磁率の周波数特性が悪く、高周波になると透
磁率が低下し、高周波での損失が増大するといった問題
点があった。However, in the case of the conventional Mn-Zn type ferrite, there is a problem that the frequency characteristic of magnetic permeability is poor, the magnetic permeability decreases at high frequencies, and the loss at high frequencies increases.
【０００６】本発明は、上記の事を鑑みて、高周波で高
透磁率のＭｎ―Ｚｎ系フェライトを得ることを目的とす
る。In view of the above, the present invention has a high frequency and a high frequency.
The purpose is to obtain a Mn-Zn ferrite having magnetic permeability .
【０００７】[0007]
【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、副成分としてＣａＯを０．０５〜
０．１２重量％、Ｂｉ２Ｏ３を０．０４重量％以下（但
し、０重量％を含まない）、ＳｉＯ２を０．０１〜０．
０２重量％（但し、０．０１重量％を含まない）含有し
ているＭｎ―Ｚｎ系フェライトであり、高周波で高い初
透磁率を有するものである。According to the present invention, CaO is added as an auxiliary component in an Mn--Zn system ferrite in an amount of 0.05 to 0.05.
0.12 wt%, Bi2O3 is 0.04 wt% or less (however, 0 wt% is not included), and SiO2 is 0.01 to 0.
It is a Mn-Zn-based ferrite containing 02% by weight (not including 0.01% by weight), and has a high initial magnetic permeability at high frequencies.
【０００８】本発明において、副成分量を限定した理由
は、ＣａＯ、Ｂｉ２Ｏ３、ＳｉＯ２が所定量より少ない
と損失が増大し、ＣａＯが所定量より多いと透磁率が低
くなり、Ｂｉ２Ｏ３、ＳｉＯ２が所定量より多いと異常
焼結が起こり、好ましくないからである。In the present invention, the reason for limiting the amounts of subcomponents is that when CaO, Bi2O3, and SiO2 are less than a predetermined amount, the loss increases, and when CaO is more than a predetermined amount, the magnetic permeability decreases and Bi2O3 and SiO2 are present. This is because if the amount is larger than the fixed amount, abnormal sintering will occur, which is not preferable.
【０００９】[0009]
【実施例】Ｆｅ２Ｏ３ ５３モル％、ＭｎＯ ２７モル
％、ＺｎＯ ２０モル％を主成分とし、これにＣａＯ、
Ｂｉ２Ｏ３、ＳｉＯ２を表１に示す分量含有する原料を
作製し、これを８５０℃で２時間仮焼し、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、１３８０
℃５時間酸素濃度５％で焼成した。また、実施例と同様
の試料作製工程において焼成条件（焼成温度、焼成雰囲
気）を変えて各試料を作製した。そのコアの１００ｋＨ
ｚと５００ｋＨｚの初透磁率μｉ、１００ｋＨｚでのｔ
ａｎδ／μｉ及び１００ｋＨｚにおける初透磁率μｉを
Ａとし、５００ｋＨｚにおける初透磁率μｉをＢとした
とき、（Ａ−Ｂ）／Ａで示される１００ｋＨｚに対する
５００ｋＨｚにおける初透磁率μｉの変化率△μｉ／μ
ｉを表１に示す。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。Examples Fe2O3 53 mol%, MnO 27 mol%, ZnO 20 mol% were the main components, and CaO,
A raw material containing Bi2O3 and SiO2 in the amounts shown in Table 1 was prepared, calcined at 850 ° C. for 2 hours, crushed with a ball mill for 8 hours, and compression-molded into a ring shape.
Baking was carried out at 5 ° C. for 5 hours at an oxygen concentration of 5%. In addition, each sample was prepared by changing the baking conditions (baking temperature, baking atmosphere) in the same sample manufacturing process as in the example. 100kH of the core
z and initial permeability μi of 500 kHz, t at 100 kHz
anδ / μi and initial permeability μi at 100 kHz
A, and the initial permeability μi at 500 kHz was B.
At 100 kHz indicated by (A−B) / A
Change rate of initial permeability μi at 500 kHz Δμi / μ
i is shown in Table 1. In Table 1, those within the range of the present invention are examples, and those outside the range are comparative examples.
【００１０】[0010]
【表１】 [Table 1]
【００１１】また、実施例（試料Ｎｏ．８）と比較例
（試料Ｎｏ．１０）の透磁率の周波数特性を図１に示
す。この図１及び表１に示されるとおり、本発明の実施
例は、高周波でも透磁率の高い材料であることがわか
る。これと同時に損失の小さい材料であることもわか
る。Further, the frequency characteristics of magnetic permeability of the example (Sample No. 8) and the comparative example (Sample No. 10) are shown in FIG. As shown in FIG. 1 and Table 1, it is understood that the examples of the present invention are materials having high magnetic permeability even at high frequencies. At the same time, it can be seen that the material has low loss.
【００１２】また、含有するＣａＯ、Ｂｉ２Ｏ３、Ｓｉ
Ｏ２は、ＣａＯは０．０５〜０．１２重量％、Ｂｉ２Ｏ
３は０．０４重量％以下（但し、０重量％を含まな
い）、ＳｉＯ２を０．０１〜０．０２重量％（但し、
０．０１重量％を含まない）の範囲内であれば、表１に
示した実施例とほぼ類似の特性が得られることがわかっ
た。Further, CaO, Bi2O3 and Si contained
O2 is 0.05 to 0.12 wt% CaO, Bi2O
3 is 0.04% by weight or less (not including 0% by weight), and SiO2 is 0.01 to 0.02% by weight (however,
It was found that the characteristics similar to those of the examples shown in Table 1 can be obtained within the range of 0.01% by weight).
【００１３】但し、焼成温度が１３５０〜１３８０℃の
範囲内であれば、そのときの酸素濃度は１％を超えるこ
とが必要である。酸素濃度が１％以下のときは、周波数
５００ｋＨｚの初透磁率の低下や相対損失係数ｔａｎδ
／μｉの増大を招く。However, if the firing temperature is in the range of 1350 to 1380 ° C., the oxygen concentration at that time must exceed 1%. When the oxygen concentration is 1% or less, the initial magnetic permeability at a frequency of 500 kHz decreases and the relative loss coefficient tan δ.
/ Μi increases.
【００１４】また、焼成温度が１２５０〜１３５０℃の
範囲内であれば、そのときの酸素濃度は１％以下であ
る。酸素濃度が１％を超えると、初透磁率の低下を招
く。尚、含有する副成分のうち、ＣａＯが０．０５〜
０．０８重量％の範囲で周波数１００ｋＨｚに対する５
００ｋＨｚにおけるμｉの変化率△μｉ／μｉは１０％
以下となり、特に高周波まで高い透磁率を得ることがで
きる。このときの焼成条件は、焼成温度１２５０〜１３
５０℃、酸素濃度１％以下である。If the firing temperature is in the range of 1250 to 1350 ° C., the oxygen concentration at that time is 1% or less. When the oxygen concentration exceeds 1%, the initial magnetic permeability is lowered. Incidentally, CaO is 0.05 to
5 for frequency 100 kHz in the range of 0.08% by weight
Change rate of μi at 00kHz Δμi / μi is 10%
Below, it is possible to obtain a high magnetic permeability, especially up to a high frequency. The firing conditions at this time are firing temperatures of 1250 to 13
It is 50 ° C. and the oxygen concentration is 1% or less.
【００１５】[0015]
【発明の効果】本発明によれば、高周波（５００ｋＨ
ｚ）まで高い透磁率を有し、しかも１００ｋＨｚと５０
０ｋＨｚでの透磁率の変化が小さいＭｎ―Ｚｎ系フェラ
イトを得ることができる。According to the present invention, a high frequency (500 kHz)
z) has a high magnetic permeability, and at 100 kHz and 50
It is possible to obtain a Mn—Zn-based ferrite with a small change in magnetic permeability at 0 kHz .
【図１】本発明に係る実施例と比較例との透磁率の周波
数特性である。FIG. 1 is a frequency characteristic of magnetic permeability of an example according to the present invention and a comparative example.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−278162（ＪＰ，Ａ) 特開 昭59−156920（ＪＰ，Ａ) 特開 昭61−42105（ＪＰ，Ａ) 特開 平６−140230（ＪＰ，Ａ) 特開 平５−330906（ＪＰ，Ａ) 特公 昭51−49019（ＪＰ，Ｂ２) 特公 昭53−18718（ＪＰ，Ｂ１) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-62-278162 (JP, A) JP-A-59-156920 (JP, A) JP-A-61-42105 (JP, A) JP-A-6- 140230 (JP, A) JP-A-5-330906 (JP, A) JP 51-49019 (JP, B2) JP 53-18718 (JP, B1)
Claims (2)
分としてＣａＯを０．０５〜０．１２重量％、Ｂｉ2Ｏ3
を０．０４重量％以下（但し、０重量％を含まない）、
ＳｉＯ2を０．０１〜０．０２重量％（但し、０．０１
重量％を含まない）含有し、初透磁率μｉが周波数１０
０ｋＨｚにおいて５０００以上、５００ｋＨｚにおいて
４０００以上であることを特徴とするＭｎ―Ｚｎ系フェ
ライト。1. A Mn—Zn-based ferrite containing 0.05 to 0.12% by weight of CaO as a secondary component and Bi 2 O 3
0.04% by weight or less (excluding 0% by weight),
SiO 2 0.01 to 0.02% by weight (however, 0.01
Content is not included) and the initial permeability μi is 10
A Mn-Zn-based ferrite characterized by having a frequency of 5000 or more at 0 kHz and a frequency of 4000 or more at 500 kHz.
分としてＣａＯが０．０５〜０．０８重量％、Ｂｉ 2 Ｏ 3
を０．０４重量％以下（但し、０重量％を含まない）、
ＳｉＯ 2 を０．０１〜０．０２重量％（但し、０．０１
重量％を含まない）含有し、初透磁率μｉが周波数１０
０ｋＨｚ及び５００ｋＨｚにおいて５０００以上、周波
数１００ｋＨｚにおける初透磁率μｉに対する周波数５
００ｋＨｚにおける初透磁率μｉの変化率が１０％以下
であることを特徴とするＭｎ―Ｚｎ系フェライト。2. A by-product of Mn--Zn ferrite
CaO is 0.05 to 0.08% by weight, Bi 2 O 3
0.04% by weight or less (excluding 0% by weight),
SiO 2 0.01 to 0.02% by weight (however, 0.01
Content is not included) and the initial permeability μi is 10
5000 or more at 0 kHz and 500 kHz, frequency
Frequency 5 for initial permeability μi at several 100 kHz
Change rate of initial permeability μi at 00 kHz is 10% or less
Mn-Zn ferrite, characterized in that it.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-69238 | 1991-03-07 | ||
| JP3069238A JPH05330906A (en) | 1991-03-07 | 1991-03-07 | Mn-zn-based ferrite |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6331624A Division JP2731357B2 (en) | 1994-12-08 | 1994-12-08 | Method for producing Mn-Zn ferrite |
| JP6331625A Division JP2731358B2 (en) | 1994-12-08 | 1994-12-08 | Method for producing Mn-Zn ferrite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0696933A JPH0696933A (en) | 1994-04-08 |
| JPH0779043B2 true JPH0779043B2 (en) | 1995-08-23 |
Family
ID=13396974
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3069238A Pending JPH05330906A (en) | 1991-03-07 | 1991-03-07 | Mn-zn-based ferrite |
| JP4084563A Expired - Lifetime JPH0779043B2 (en) | 1991-03-07 | 1992-03-05 | Mn-Zn ferrite |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3069238A Pending JPH05330906A (en) | 1991-03-07 | 1991-03-07 | Mn-zn-based ferrite |
Country Status (1)
| Country | Link |
|---|---|
| JP (2) | JPH05330906A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05330906A (en) * | 1991-03-07 | 1993-12-14 | Hitachi Ferrite Ltd | Mn-zn-based ferrite |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5149019A (en) * | 1974-10-25 | 1976-04-27 | Victor Company Of Japan | Bideoteepurekoodano batsuteryoryokeihosochi |
| JPS5318718A (en) * | 1976-08-02 | 1978-02-21 | Toshin Chemical Co | Preparation of sodium salt of cephalothin |
| JPS59156920A (en) * | 1983-02-21 | 1984-09-06 | Nippon Ferrite Ltd | Magnetic oxide material |
| JPS6142105A (en) * | 1984-08-02 | 1986-02-28 | Tdk Corp | Manganese-zinc system ferrite material and magnetic core for high frequency power supply transformer |
| JPS62278162A (en) * | 1986-05-23 | 1987-12-03 | 株式会社トーキン | Oxide ferrite composition and manufacture |
| JPH05330906A (en) * | 1991-03-07 | 1993-12-14 | Hitachi Ferrite Ltd | Mn-zn-based ferrite |
| JPH06140230A (en) * | 1991-05-16 | 1994-05-20 | Tokin Corp | Manufacture of low-loss oxide magnetic material |
-
1991
- 1991-03-07 JP JP3069238A patent/JPH05330906A/en active Pending
-
1992
- 1992-03-05 JP JP4084563A patent/JPH0779043B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0696933A (en) | 1994-04-08 |
| JPH05330906A (en) | 1993-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100389821B1 (en) | MnZn ferrite production process, MnZn ferrite, and ferrite core for power supplies | |
| JPH09306716A (en) | Sintered ferrite material and manufacture thereof | |
| JP2002134312A (en) | Magnetic material and coil part using the same | |
| JPH081844B2 (en) | High frequency low loss ferrite for power supply | |
| JP3635410B2 (en) | Method for producing manganese-zinc based ferrite | |
| JPH0779043B2 (en) | Mn-Zn ferrite | |
| JP2731358B2 (en) | Method for producing Mn-Zn ferrite | |
| JP2731357B2 (en) | Method for producing Mn-Zn ferrite | |
| JP3042627B2 (en) | Low loss ferrite | |
| JPH0433755B2 (en) | ||
| JP2556917B2 (en) | Manufacturing method of high frequency and low loss ferrite for power supply | |
| JP2802839B2 (en) | Oxide soft magnetic material | |
| JP2907253B2 (en) | High permeability Mn-Zn ferrite | |
| JP2726388B2 (en) | High magnetic permeability high saturation magnetic flux density Ni-based ferrite core and method of manufacturing the same | |
| JP3454472B2 (en) | Manganese-zinc ferrite and method for producing the same | |
| JP2000299217A (en) | High permeability oxide magnetic material | |
| WO2023182133A1 (en) | MnZn-BASED FERRITE | |
| JP2627676B2 (en) | Manufacturing method of oxide magnetic material | |
| JP3044666B2 (en) | Low loss ferrite for power supply | |
| JP2001348226A (en) | Magnetic ferrite material | |
| JP2963067B2 (en) | Low loss ferrite | |
| JPH0555463B2 (en) | ||
| JP2000091114A (en) | High permeability oxide magnetic material | |
| JPH11228217A (en) | Mn-zn ferrite | |
| JP3128656B2 (en) | Method for producing magnetic oxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080823 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090823 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090823 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100823 Year of fee payment: 15 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100823 Year of fee payment: 15 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110823 Year of fee payment: 16 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110823 Year of fee payment: 16 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120823 Year of fee payment: 17 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120823 Year of fee payment: 17 |