JP2898772B2 - Oxide magnetic material - Google Patents
Oxide magnetic materialInfo
- Publication number
- JP2898772B2 JP2898772B2 JP3065625A JP6562591A JP2898772B2 JP 2898772 B2 JP2898772 B2 JP 2898772B2 JP 3065625 A JP3065625 A JP 3065625A JP 6562591 A JP6562591 A JP 6562591A JP 2898772 B2 JP2898772 B2 JP 2898772B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- oxide magnetic
- magnetic material
- pbo
- 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
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、酸化物磁性材料に関
し、より詳しくは、例えばドラム型コア等に適用して好
適な機械的強度の増大を図った酸化物磁性材料に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxide magnetic material, and more particularly, to an oxide magnetic material which is suitable for use in, for example, a drum core and has an increased mechanical strength.
【０００２】[0002]
【従来の技術】酸化物磁性材料の主流を占めるフェライ
トは、一般に機械的強度が弱く、かつ、もろいので、こ
のようなフェライトを例えばドラム型コアとして用いた
場合、ワイヤの巻線工程で損傷したり割れたりすること
が多い。2. Description of the Related Art Ferrites, which occupy the mainstream of oxide magnetic materials, generally have low mechanical strength and are fragile. Therefore, when such ferrites are used, for example, as a drum core, they are damaged in a wire winding process. Often cracks or cracks.
【０００３】かかる観点から、本願出願人は、先に特公
昭48-40954号において機械的強度の向上を図った強磁性
フェライトを提案している。From this viewpoint, the present applicant has previously proposed a ferromagnetic ferrite having improved mechanical strength in Japanese Patent Publication No. 48-40954.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、同公報
に開示した強磁性フェライトは、フェライトにＰｂＯ
０．２乃至３重量％、タルク０．２乃至３重量％を含有
させたものであり、その機械的強度は７乃至１２Kg／mm
2 程度である。However, the ferromagnetic ferrite disclosed in the above publication has a PbO
It contains 0.2 to 3% by weight and 0.2 to 3% by weight of talc and has a mechanical strength of 7 to 12 kg / mm.
About 2 .
【０００５】このため、機械的強度が十分でなく、特に
近年におけるドラム型コア等の小型化、薄型化に伴う機
械的強度の向上の要請に対処できないという問題があっ
た。For this reason, there is a problem that the mechanical strength is not sufficient, and in particular, it is not possible to cope with the recent demand for improvement in mechanical strength accompanying the downsizing and thinning of drum-type cores and the like.
【０００６】そこで、本発明は材料組成を改良し、従来
例よりも機械的強度を大幅に改良した酸化物磁性材料を
提供することを目的とするものである。Accordingly, an object of the present invention is to provide an oxide magnetic material in which the material composition is improved and the mechanical strength is greatly improved as compared with the conventional example.
【０００７】[0007]
【課題を解決するための手段】請求項１記載の酸化物磁
性材料は、Ｎｉ−Ｃｕ−Ｚｎ系フェライトに、ＰｂＯ
３．１乃至３０重量％及びタルク３．１乃至３０重量％
を含有したものである。According to a first aspect of the present invention, there is provided an oxide magnetic material comprising a Ni—Cu—Zn ferrite and a PbO 2 ferrite.
3.1 to 30% by weight and talc 3.1 to 30% by weight
It contains.
【０００８】請求項２記載の酸化物磁性材料は、Ｎｉ−
Ｃｕ−Ｚｎ系フェライトに、ＰｂＯ３．１乃至３０重量
％及びＳｉＯ2 ０．１乃至３０重量％を含有したもので
ある。[0008] The oxide magnetic material according to claim 2 is characterized in that Ni-
A Cu-Zn ferrite, those containing a PbO3.1 to 30 wt% and SiO 2 0.1 to 30 wt%.
【０００９】[0009]
【作用】請求項１記載の酸化物磁性材料においては、
３．１乃至３０重量％のＰｂＯ及び３．１乃至３０重量
％のタルク中のＳｉ成分が、Ｎｉ−Ｃｕ−Ｚｎ系フェラ
イトの焼成段階でＰｂＯ−Ｓｉ化合物として主にこのＮ
ｉ−Ｃｕ−Ｚｎ系フェライトの結晶粒界に存在する状態
となって２相構造を形成する。The oxide magnetic material according to claim 1,
3.1 to 30% by weight of PbO and 3.1 to 30% by weight of Si component in talc are mainly used as a PbO-Si compound in the sintering step of the Ni—Cu—Zn-based ferrite.
The state is present at the crystal grain boundary of the i-Cu-Zn ferrite to form a two-phase structure.
【００１０】そして、この場合、Ｎｉ−Ｃｕ−Ｚｎ系フ
ェライトの熱膨脹係数に対して、ＰｂＯ−Ｓｉ化合物の
熱膨脹係数が小さいため、焼成後の冷却過程で粒界中の
ＰｂＯ−Ｓｉ化合物に圧縮応力が存在する。この結果、
Ｎｉ−Ｃｕ−Ｚｎ系フェライトに引張り力が作用する際
の強度が大きくなる。In this case, since the thermal expansion coefficient of the PbO-Si compound is smaller than the thermal expansion coefficient of the Ni-Cu-Zn-based ferrite, compressive stress is applied to the PbO-Si compound in the grain boundary during the cooling process after firing. Exists. As a result,
The strength when a tensile force acts on the Ni-Cu-Zn-based ferrite increases.
【００１１】[0011]
【００１２】[0012]
【００１３】[0013]
【実施例】以下に本発明の実施例を詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail.
【００１４】 例１ Ｆｅ2 Ｏ3 ４７モル％、ＮｉＯ２７モル％、ＣｕＯ４モ
ル％、ＺｎＯ１７モル％、ＭｎＯ５．０モル％の組成か
らなる酸化物磁性材料としてのフェライトに、ＰｂＯ４
乃至６．５重量（Wt）％及びタルク４乃至５．５重量％
を添加し、１０６０℃の温度条件で焼成して酸化物磁性
材料を得た。Example 1 Ferrite as an oxide magnetic material having a composition of 47 mol% of Fe 2 O 3 , 27 mol% of NiO, 4 mol% of CuO, 17 mol% of ZnO, and 5.0 mol% of MnO was added to PbO 4
To 6.5% by weight (Wt) and 4 to 5.5% by weight of talc
Was added and calcined at a temperature of 1060 ° C. to obtain an oxide magnetic material.
【００１５】尚、１０００乃至１１００℃の温度条件で
も同様な酸化物磁性材料が得られてた。Incidentally, similar oxide magnetic materials were obtained even at a temperature of 1000 to 1100 ° C.
【００１６】この場合のタルク及びＰｂＯの添加量と抗
折強度との関係を図１に示す。FIG. 1 shows the relationship between the added amount of talc and PbO and the bending strength in this case.
【００１７】図１から明らかなように、ＰｂＯが４乃至
４．５重量％で、タルクが５乃至５．５重量％のときの
抗折強度は１６．８乃至１７．８Kg／mm2 と非常に大き
くなっている。As apparent from FIG. 1, when the PbO content is 4 to 4.5% by weight and the talc content is 5 to 5.5% by weight, the transverse rupture strength is 16.8 to 17.8 kg / mm 2, which is very low. It is getting bigger.
【００１８】尚、上述した抗折強度は、酸化物磁性材料
を間隔４０mmで支持した状態でその中間位置に２０mm／
min の割合で所定の荷重を加えたときの値を示すもので
ある。The bending strength described above is such that the oxide magnetic material is supported at an interval of 40 mm, and 20 mm /
It shows the value when a predetermined load is applied at the rate of min.
【００１９】 例２ Ｆｅ2 Ｏ3 ４７モル％、ＮｉＯ２７モル％、ＣｕＯ４モ
ル％、ＺｎＯ１７モル％、ＭｎＯ５．０モル％の組成か
らなる酸化物磁性材料としてのフェライトに、ＰｂＯ０
乃至３０重量％、タルク０乃至３０重量％を添加し、例
１と同一の条件で焼成して酸化物磁性材料を得た。Example 2 Ferrite as an oxide magnetic material having a composition of 47 mol% of Fe 2 O 3 , 27 mol% of NiO, 4 mol% of CuO, 17 mol% of ZnO, and 5.0 mol% of MnO was added to PbO 0
To 30% by weight, and 0 to 30% by weight of talc were added, and calcined under the same conditions as in Example 1 to obtain an oxide magnetic material.
【００２０】このときのＪＩＳ法に基く３点曲げ強度の
添加量別の測定結果を図２に示す。FIG. 2 shows the measurement results of the three-point bending strength based on the addition amount based on the JIS method at this time.
【００２１】図２から明らかなように、従来例の添加範
囲に対する３点曲げ強度の最大値１２Kg／mm2 に比べ、
ＰｂＯ３．１乃至３０重量％、タルク３．１乃至３０重
量％の範囲で本例の３点曲げ強度は向上し、特にＰｂＯ
５重量％、タルク５重量％のところに１９Kg／mm2 を示
すピーク値が存在する。As apparent from FIG. 2 , compared with the maximum value of 12 kg / mm 2 of the three-point bending strength for the addition range of the conventional example,
In the range of 3.1 to 30% by weight of PbO and 3.1 to 30% by weight of talc, the three-point bending strength of the present example is improved.
A peak value of 19 kg / mm 2 exists at 5% by weight and 5% by weight of talc.
【００２２】 例３ Ｆｅ2 Ｏ3 ４７モル％、ＮｉＯ２７モル％、ＣｕＯ４モ
ル％、ＺｎＯ１７モル％、ＭｎＯ５．０モル％の組成か
らなる酸化物磁性原料としてのフェライトに、ＰｂＯ
３．１重量％以上、好ましくは４．５重量％程度、タル
ク３．１重量％以上、好ましくは４重量％程度添加し、
上述した場合と同様な条件で酸化物磁性材料を得た。Example 3 Ferrite as an oxide magnetic raw material having a composition of 47 mol% of Fe 2 O 3 , 27 mol% of NiO, 4 mol% of CuO, 17 mol% of ZnO and 5.0 mol% of MnO was added to PbO.
3.1% by weight or more, preferably about 4.5% by weight, talc 3.1% by weight or more, preferably about 4% by weight,
An oxide magnetic material was obtained under the same conditions as described above.
【００２３】この場合のＰｂＯ、タルクの添加量とＪＩ
Ｓ法に基く３点曲げ強度との関係を図３に示す。In this case, the added amount of PbO and talc and JI
FIG. 3 shows the relationship with the three-point bending strength based on the S method.
【００２４】図３から明らかなように、本例の酸化物磁
性材料は１９Kg／mm2 程度、従来例のＰｂＯ３重量％、
タルク１重量％のものでは１１Kg／mm2 程度の３点曲げ
強度となり、本例では従来例よりも７０％程度も３点曲
げ強度が向上している。As is apparent from FIG. 3, the oxide magnetic material of this example is about 19 kg / mm 2 , 3% by weight of PbO of the conventional example,
In the case of 1% by weight of talc, the three-point bending strength is about 11 kg / mm 2 , and in this example, the three-point bending strength is improved by about 70% as compared with the conventional example.
【００２５】 例４ 上述した例１の酸化物磁性材料及び従来例の酸化物磁性
材料により各々１０個のドラム型コアを作成し、各々の
芯折れ強度を測定した。その結果を図４に示す。Example 4 Ten drum-shaped cores were formed from the oxide magnetic material of Example 1 and the oxide magnetic material of the conventional example, and the bending strength of each of the cores was measured. FIG. 4 shows the results.
【００２６】本例では、芯折れ強度の最大が２．４８Kg
f 、最小が１．６２Kgf 、平均で２．０３Kgf であった
のに対し、従来例では最大で１．５２Kgf 、最小で０．
８０Kgf 、平均で１．２０Kgf であった。この結果か
ら、本例では従来例よりも７０％程度芯折れ強度が向上
していることが判明した。In this example, the maximum core breaking strength is 2.48 kg.
f and the minimum were 1.62 kgf and the average was 2.03 kgf, whereas in the conventional example, the maximum was 1.52 kgf and the minimum was 0.3 kgf.
The weight was 80 kgf and the average was 1.20 kgf. From this result, it was found that in this example, the core bending strength was improved by about 70% as compared with the conventional example.
【００２７】以上詳述したように、本実施例の酸化物磁
性材料は、従来例に比べ、抗折強度、３点曲げ強度が大
幅に向上し、また、ドラム型コアとした場合にもその芯
折れ強度が大幅に向上する。As described in detail above, the oxide magnetic material of the present embodiment has significantly improved transverse rupture strength and three-point bending strength as compared with the conventional example. Core breaking strength is greatly improved.
【００２８】［比較例］ Ｆｅ２Ｏ３４７モル％、ＮｉＯ２７モル％、ＣｕＯ４モ
ル％、ＺｎＯ１７モル％、ＭｎＯ５．０モル％の組成か
らなる酸化物磁性材料としてのフェライトに、ＰｂＯ０
乃至３０重量％、ＳｉＯ２０．１乃至３０重量％を添加
し、例１と同一の条件で焼成して酸化物磁性材料を得
た。 Comparative Example PbO0 was added to ferrite as an oxide magnetic material having a composition of 47 mol% of Fe 2 O 3 , 27 mol% of NiO, 4 mol% of CuO, 17 mol% of ZnO, and 5.0 mol% of MnO.
To 30% by weight and 0.1 to 30% by weight of SiO 2 were added and calcined under the same conditions as in Example 1 to obtain an oxide magnetic material.
【００２９】このときのＪＩＳ法に基く３点曲げ強度の
添加量別の測定結果を図５に示す。FIG. 5 shows the measurement results of the three-point bending strength based on the addition amount based on the JIS method at this time.
【００３０】図５から明らかなように、従来例の添加範
囲に対する３点曲げ強度の最大値１２Kg／mm2 に比べ、
ＰｂＯ３．１乃至３０重量％、ＳｉＯ2 ０．１乃至３０
重量％の範囲で本例の３点曲げ強度は向上し、特にＰｂ
Ｏ５重量％、ＳｉＯ2 ３重量％のところに図２に示す場
合と同様１９Kg／mm2 を示すピーク値が存在する。As is apparent from FIG. 5, compared with the maximum value of 12 kg / mm 2 of the three-point bending strength for the addition range of the conventional example,
PbO 3.1 to 30% by weight, SiO 2 0.1 to 30
In the range of weight%, the three-point bending strength of this example is improved,
A peak value of 19 kg / mm 2 exists at 5% by weight of O and 3% by weight of SiO 2 as in the case shown in FIG.
【００３１】このような組成の酸化物磁性材料によって
も、従来例に比べ、３点曲げ強度が大幅に向上し、ま
た、ドラム型コアとした場合にもその芯折れ強度が大幅
に向上する。Even with the oxide magnetic material having such a composition, the three-point bending strength is greatly improved as compared with the conventional example, and the core bending strength is also greatly improved when a drum core is used.
【００３２】本発明は、上述した実施例に限定されるも
のではなく、その要旨の範囲内で種々の変形が可能であ
る。The present invention is not limited to the embodiment described above, and various modifications are possible within the scope of the invention.
【００３３】[0033]
【発明の効果】以上説明した本発明によれば、以下の効
果を奏する。According to the present invention described above, the following effects can be obtained.
【００３４】請求項１記載の発明によれば、酸化物磁性
原料にＰｂＯ、タルクを既述した範囲となるように含有
する構成で、従来例に比べ機械的強度を大幅に向上させ
ることが可能な酸化物磁性材料を提供することができ
る。According to the first aspect of the present invention, the oxide magnetic raw material contains PbO and talc in the above-described range, so that the mechanical strength can be greatly improved as compared with the conventional example. It is possible to provide a simple oxide magnetic material.
【００３５】[0035]
【図１】本発明の実施例における例１のＰｂＯ、タルク
含有量と抗折強度との関係を示すグラフFIG. 1 is a graph showing the relationship between the PbO and talc contents and the transverse rupture strength of Example 1 in Examples of the present invention.
【図２】本発明の実施例における例２のＰｂＯ、タルク
含有量と３点曲げ強度との関係を示すグラフFIG. 2 is a graph showing the relationship between the content of PbO and talc and the three-point bending strength of Example 2 in Examples of the present invention.
【図３】本発明の実施例における例３のＰｂＯ、タルク
含有量と３点曲げ強度との関係を示すグラフFIG. 3 is a graph showing the relationship between the content of PbO and talc and the three-point bending strength of Example 3 in Examples of the present invention.
【図４】本実施例、従来例の各酸化物磁性材料によりド
ラム型コアを作成した場合の各々の芯折れ強度を示すグ
ラフFIG. 4 is a graph showing the bending strength of each core when a drum core is made of each oxide magnetic material of the present embodiment and the conventional example.
【図５】本発明の比較例のＰｂＯ、ＳｉＯ２含有量と３
点曲げ強度との関係を示すグラフFIG. 5 shows PbO and SiO 2 contents and 3 of Comparative Example of the present invention.
Graph showing the relationship with point bending strength
Claims (1)
Ｏ３．１乃至３０重量％及びタルク３．１乃至３０重量
％を含有したことを特徴とする酸化物磁性材料。1. Pb is added to a Ni—Cu—Zn ferrite.
An oxide magnetic material containing 3.1 to 30% by weight of O and 3.1 to 30% by weight of talc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3065625A JP2898772B2 (en) | 1991-03-06 | 1991-03-06 | Oxide magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3065625A JP2898772B2 (en) | 1991-03-06 | 1991-03-06 | Oxide magnetic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04278502A JPH04278502A (en) | 1992-10-05 |
| JP2898772B2 true JP2898772B2 (en) | 1999-06-02 |
Family
ID=13292391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3065625A Expired - Lifetime JP2898772B2 (en) | 1991-03-06 | 1991-03-06 | Oxide magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2898772B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3672161B2 (en) * | 1997-07-16 | 2005-07-13 | Ｔｄｋ株式会社 | Ferrite manufacturing method and inductor manufacturing method |
| JP3181560B2 (en) * | 1998-10-23 | 2001-07-03 | ティーディーケイ株式会社 | Ferrite oxide magnetic material |
-
1991
- 1991-03-06 JP JP3065625A patent/JP2898772B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04278502A (en) | 1992-10-05 |
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