JPH08104561A - Oxide magnetic material - Google Patents
Oxide magnetic materialInfo
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- JPH08104561A JPH08104561A JP6261624A JP26162494A JPH08104561A JP H08104561 A JPH08104561 A JP H08104561A JP 6261624 A JP6261624 A JP 6261624A JP 26162494 A JP26162494 A JP 26162494A JP H08104561 A JPH08104561 A JP H08104561A
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- oxide magnetic
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インダクタ等の電気部
品に使用される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 used for electric parts such as inductors.
【０００２】[0002]
【従来の技術】インダクタ等の電気部品に使用される酸
化物磁性材料としてＮｉ−Ｃｕ−Ｚｎ系フェライト酸化
物磁性材料が知られている。例えば、特開昭６４−９８
６３号には、Ｎｉ−Ｃｕ−Ｚｎ系の高抵抗率低損失酸化
物磁性材料が開示されている。2. Description of the Related Art Ni-Cu-Zn type ferrite oxide magnetic material is known as an oxide magnetic material used for electric parts such as inductors. For example, JP-A 64-98
No. 63 discloses a Ni—Cu—Zn-based high resistivity, low loss oxide magnetic material.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
Ｎｉ−Ｃｕ−Ｚｎ系酸化物磁性材料を使用した場合、チ
ップ等の形状が小さくなると、満足できる透磁率を得る
ことは難しい。また、焼成温度が１０００℃以上と比較
的高いため、内部導体としてＡｇ、Ａｇ−Ｐｄ、Ａｇ−
Ｃｕ等の融点が１０００℃より低い金属導体を使用する
ことが不可能であった。そこで、本発明の目的は、高い
透磁率を有する酸化物磁性材料であって、内部導体とし
てＡｇ、Ａｇ−Ｐｄ、Ａｇ−Ｃｕ等の金属導体の使用を
可能にした材料を提供することである。However, when the conventional Ni-Cu-Zn-based oxide magnetic material is used, it is difficult to obtain a satisfactory magnetic permeability when the shape of the chip or the like becomes small. Moreover, since the firing temperature is relatively high at 1000 ° C. or higher, Ag, Ag—Pd, Ag—
It was impossible to use a metal conductor such as Cu having a melting point lower than 1000 ° C. Therefore, an object of the present invention is to provide an oxide magnetic material having a high magnetic permeability, which enables use of a metal conductor such as Ag, Ag-Pd, or Ag-Cu as an inner conductor. .
【０００４】[0004]
【課題を解決するための手段】本発明の酸化物磁性材料
は、上記目的を達成すべく、ＦｅをＦｅ2Ｏ3に換算して
４５．０〜５０．０ｍｏｌ％、ＮｉをＮｉＯに換算して
５．０〜１０．０ｍｏｌ％、ＣｕをＣｕＯに換算して
５．０〜１５．０ｍｏｌ％、ＺｎをＺｎＯに換算して２
５．０〜３５．０ｍｏｌ％、ＭｎをＭｎ3Ｏ4に換算して
０．１〜３．０ｍｏｌ％及びＬｉをＬｉ2Ｏ に換算して
０．０１〜３．０ｍｏｌ％含むことを特徴とする。前記
酸化物磁性材料は、９５０℃以下の温度で焼成されたも
のであることが好ましい。In order to achieve the above-mentioned object, the oxide magnetic material of the present invention has Fe converted to Fe 2 O 3 of 45.0 to 50.0 mol% and Ni converted to NiO. 5.0-15.0 mol%, Cu converted to CuO 5.0-15.0 mol%, Zn converted to ZnO 2
5.0 to 35.0 mol%, Mn is converted to Mn 3 O 4 , 0.1 to 3.0 mol%, and Li is converted to Li 2 O, 0.01 to 3.0 mol%. To do. The oxide magnetic material is preferably fired at a temperature of 950 ° C. or lower.
【０００５】[0005]
【作用】本発明の酸化物磁性材料では、比抵抗を低下さ
せることなく、透磁率及びＱ特性を向上させ、Ｌ値の温
度特性を改善させることができる。また、９５０℃以下
での焼成が可能となり、内部導体にＡｇ、Ａｇ−Ｐｄ、
Ａｇ−Ｃｕ等を使用することができる。In the oxide magnetic material of the present invention, the magnetic permeability and the Q characteristic can be improved and the temperature characteristic of the L value can be improved without lowering the specific resistance. Further, it becomes possible to fire at 950 ° C. or lower, and Ag, Ag-Pd, and
Ag-Cu etc. can be used.
【０００６】[0006]
【実施例】以下、本発明を実施例及び比較例に基づいて
詳細に説明する。 （実施例１〜８及び比較例１〜１２）Ｆｅ2Ｏ3、Ｎｉ
Ｏ、ＣｕＯ、ＺｎＯ、Ｍｎ3Ｏ4及び焼き上がりで０．０
１〜３．０ｍｏｌ％のＬｉ2Ｏ に相当するＬｉＣｌを、
それぞれ表１に示す割合で秤量し、湿式混合後、脱水、
乾燥した。この乾燥物を大気中で約７００〜約８００℃
の範囲の温度で１時間仮焼し、その後ボールミルで１５
時間解砕した。これに有機バインダを加えて、造粒、成
形し、大気中で約８５０〜約９５０℃の範囲の温度で１
時間焼成した。かくして得られた燒結体の透磁率μ及び
比抵抗ρを測定した。なお、透磁率は周波数１００ＭＨ
ｚ、電圧０．５Ｖの条件でまた比抵抗は電圧２５Ｖ、保
持時間２０秒の条件で測定した。得られた結果を表１に
示す。EXAMPLES The present invention will be described in detail below based on examples and comparative examples. (Examples 1 to 8 and Comparative Examples 1 to 12) Fe 2 O 3 and Ni
O, CuO, ZnO, Mn 3 O 4 and 0.0 after baking
LiCl corresponding to 1 to 3.0 mol% of Li 2 O,
Each was weighed at the ratio shown in Table 1, wet-mixed, dehydrated,
Dried. This dried product is about 700 to about 800 ° C in the atmosphere.
Calcination at a temperature in the range of 1 hour for 1 hour, then in a ball mill for 15
Crushed on time. An organic binder is added to this, and the mixture is granulated and molded, and then, at a temperature in the range of about 850 to about 950 ° C., 1
Burned for hours. The magnetic permeability μ and the specific resistance ρ of the sintered body thus obtained were measured. The magnetic permeability is 100 MHz.
The specific resistance was measured under the conditions of z and voltage of 0.5 V, and the specific resistance under conditions of voltage of 25 V and holding time of 20 seconds. The results obtained are shown in Table 1.
【０００７】[0007]
【表１】 [Table 1]
【０００８】表１から明らかなように、本発明の酸化物
磁性材料は、透磁率が７５０以上且つ比抵抗が２５００
ＭΩ・ｃｍ以上の特性を有している。また、９５０℃以
下での焼成が可能である。一方、比較例１〜１２の酸化
物磁性材料では、上記したような所望特性を得ることが
できない。表１に示された結果に基づいて各成分の範囲
限定の理由について説明する。Ｆｅ2Ｏ3については、５
０．０ｍｏｌ％を超えると（比較例２）燒結せず、また
４５．０ｍｏｌ％未満だと（比較例１）透磁率及び比抵
抗が共に低いので、４５．０〜５０．０ｍｏｌ％の範囲
に限定した。ＮｉＯについては、１０．０ｍｏｌ％を超
えると（比較例４）透磁率が低く、また５．０ｍｏｌ％
未満だと（比較例３）比抵抗が低いので、５．０〜１
０．０ｍｏｌ％の範囲に限定した。ＣｕＯについては、
１５．０ｍｏｌ％を超えると（比較例６）透磁率及び比
抵抗が共に低く、また５．０ｍｏｌ％未満だと（比較例
５）燒結しないので、５．０〜１５．０ｍｏｌ％の範囲
に限定した。ＺｎＯについては、３５．０ｍｏｌ％を超
えると（比較例８）比抵抗が低く、また２５．０ｍｏｌ
％未満だと（比較例７）透磁率及び比抵抗が共に低いの
で、２５．０〜３５．０ｍｏｌ％の範囲に限定した。Ｍ
ｎ3Ｏ4については、３．０ｍｏｌ％を超えると（比較例
１０）燒結せず、また０．１ｍｏｌ％未満だと（比較例
９）透磁率が低いので、０．１〜３．０ｍｏｌ％の範囲
に限定した。Ｌｉ2Ｏ については、３．０ｍｏｌ％を超
えると（比較例１２）比抵抗が低く、また０．０１未満
だと（比較例１１）燒結しないので、０．０１〜３．０
ｍｏｌ％の範囲に限定した。なお、上記実施例では、Ｌ
ｉ酸化物は配合時ＬｉＣｌとして用いたが、これに限定
されるものではなく、例えば、Ｌｉ2Ｏ、Ｌｉ2ＣＯ3 、
Ｌｉ有機酸塩等も用いることができる。As is clear from Table 1, the oxide magnetic material of the present invention has a magnetic permeability of 750 or more and a specific resistance of 2500.
It has characteristics of MΩ · cm or more. Also, firing at 950 ° C. or lower is possible. On the other hand, with the oxide magnetic materials of Comparative Examples 1 to 12, the desired characteristics as described above cannot be obtained. The reason for limiting the range of each component will be described based on the results shown in Table 1. 5 for Fe 2 O 3
If it exceeds 0.0 mol% (Comparative Example 2), it does not sinter, and if it is less than 45.0 mol% (Comparative Example 1), since both the magnetic permeability and the specific resistance are low, it falls within the range of 45.0 to 50.0 mol%. Limited Regarding NiO, when it exceeds 10.0 mol% (Comparative Example 4), the magnetic permeability is low and is 5.0 mol%.
If it is less than (Comparative Example 3), the specific resistance is low, so 5.0-1
The range was limited to 0.0 mol%. For CuO,
If it exceeds 15.0 mol% (Comparative Example 6), both the magnetic permeability and the specific resistance are low, and if it is less than 5.0 mol% (Comparative Example 5), it does not sinter, so it is limited to the range of 5.0 to 15.0 mol%. did. Regarding ZnO, when it exceeds 35.0 mol% (Comparative Example 8), the specific resistance is low, and when it is 25.0 mol.
If it is less than 0.1% (Comparative Example 7), both the magnetic permeability and the specific resistance are low, so the range was limited to 25.0 to 35.0 mol%. M
For n 3 O 4, exceeds 3.0 mol% (Comparative Example 10) without sintering, and because a less than 0.1 mol% (Comparative Example 9) low permeability, 0.1～3.0Mol% Limited to the range. Regarding Li 2 O, if it exceeds 3.0 mol% (Comparative Example 12), the specific resistance is low, and if it is less than 0.01 (Comparative Example 11), it does not sinter.
The range was limited to mol%. In the above embodiment, L
The i oxide was used as LiCl at the time of compounding, but it is not limited to this, and for example, Li 2 O, Li 2 CO 3 ,
A Li organic acid salt or the like can also be used.
【０００９】[0009]
【発明の効果】以上詳細に説明したように、本発明によ
れば、酸化物磁性材料の構成成分の組成割合を適宜選ぶ
ことにより、比抵抗２５００ＭΩ・ｃｍ以上且つ透磁率
７５０以上を有する酸化物磁性材料であって、焼成温度
が９５０℃以下である該材料を提供することができる。
内部導体としてＡｇ等の低融点金属導体の使用を可能に
し、産業上極めて有益である。As described above in detail, according to the present invention, an oxide having a specific resistance of 2500 MΩ · cm or more and a magnetic permeability of 750 or more can be obtained by appropriately selecting the composition ratio of the constituent components of the oxide magnetic material. It is possible to provide a magnetic material having a firing temperature of 950 ° C. or lower.
This makes it possible to use a low-melting-point metal conductor such as Ag as the inner conductor, which is extremely useful in industry.
Claims (2)
０．０ｍｏｌ％、ＮｉをＮｉＯに換算して５．０〜１
０．０ｍｏｌ％、ＣｕをＣｕＯに換算して５．０〜１
５．０ｍｏｌ％、ＺｎをＺｎＯに換算して２５．０〜３
５．０ｍｏｌ％、ＭｎをＭｎ3Ｏ4に換算して０．１〜
３．０ｍｏｌ％及びＬｉをＬｉ2Ｏ に換算して０．０１
〜３．０ｍｏｌ％含むことを特徴とする酸化物磁性材
料。1. Fe is converted to Fe 2 O 3 and it is 45.0-5.
0.0 mol%, Ni converted to NiO 5.0-1
0.0 mol%, 5.0 to 1 when Cu is converted to CuO
5.0 mol%, Zn converted to ZnO 25.0 to 3
5.0 mol%, Mn converted to Mn 3 O 4 and 0.1 to
3.0 mol% and 0.01 in terms of Li converted to Li 2 O
The oxide magnetic material is characterized by containing ˜3.0 mol%.
あることを特徴とする請求項１記載の酸化物磁性材料。2. The oxide magnetic material according to claim 1, which is fired at a temperature of 950 ° C. or lower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26162494A JP3246838B2 (en) | 1994-09-30 | 1994-09-30 | Oxide magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26162494A JP3246838B2 (en) | 1994-09-30 | 1994-09-30 | Oxide magnetic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08104561A true JPH08104561A (en) | 1996-04-23 |
| JP3246838B2 JP3246838B2 (en) | 2002-01-15 |
Family
ID=17364483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26162494A Expired - Fee Related JP3246838B2 (en) | 1994-09-30 | 1994-09-30 | Oxide magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3246838B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001151564A (en) * | 1999-11-26 | 2001-06-05 | Kyocera Corp | High saturation magnetic flux density ferrite material and ferrite core using the same |
| CN1306542C (en) * | 2003-12-03 | 2007-03-21 | 横店集团东磁股份有限公司 | Process for preparing square deflecting magnetic core and material thereof |
| JP2009073724A (en) * | 2007-08-31 | 2009-04-09 | Hitachi Metals Ltd | Ferrite material and method for producing ferrite material |
-
1994
- 1994-09-30 JP JP26162494A patent/JP3246838B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001151564A (en) * | 1999-11-26 | 2001-06-05 | Kyocera Corp | High saturation magnetic flux density ferrite material and ferrite core using the same |
| CN1306542C (en) * | 2003-12-03 | 2007-03-21 | 横店集团东磁股份有限公司 | Process for preparing square deflecting magnetic core and material thereof |
| JP2009073724A (en) * | 2007-08-31 | 2009-04-09 | Hitachi Metals Ltd | Ferrite material and method for producing ferrite material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3246838B2 (en) | 2002-01-15 |
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