JPH06310322A - Magnetic material for high frequency - Google Patents
Magnetic material for high frequencyInfo
- Publication number
- JPH06310322A JPH06310322A JP5123433A JP12343393A JPH06310322A JP H06310322 A JPH06310322 A JP H06310322A JP 5123433 A JP5123433 A JP 5123433A JP 12343393 A JP12343393 A JP 12343393A JP H06310322 A JPH06310322 A JP H06310322A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic material
- high frequency
- product
- powder
- composition
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高周波用磁性材料に係
るもので、特に 100MHz 以上の高周波領域において使用
するインダクタ用に適した高周波用磁性材料に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency magnetic material, and more particularly to a high frequency magnetic material suitable for an inductor used in a high frequency region of 100 MHz or more.
【０００２】[0002]
【従来の技術】インダクタの使用される範囲が数百MHz
といった高周波領域に拡がりつつある。従来、高周波コ
イルにはNi−Zn系フェライトが主として用いられている
が、周波数が高くなると自己共振周波数などの問題が生
じ、フェロックスプレーナ等を用いることが検討されて
いる。しかし、ほとんど実用化されていない。また、高
周波領域では非磁性体を用いて空心コイルを構成し、利
用することも考えられているが、非磁性体を用いると高
いインダクタンス及びＱを得ることが困難となる。2. Description of the Related Art Inductors are used in the range of hundreds of MHz
Is expanding into the high frequency range. Conventionally, Ni-Zn type ferrite has been mainly used for the high frequency coil, but problems such as self-resonant frequency occur when the frequency becomes high, and use of a ferlock sprayer or the like has been studied. However, it has hardly been put to practical use. Further, it has been considered to construct and use an air-core coil by using a non-magnetic material in a high frequency region, but it becomes difficult to obtain high inductance and Q when using a non-magnetic material.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、フェロック
スプレーナの一種であるコバルト−バリウム−ストロン
チウム系フェライトの組成を改良し、高いμＱ積が得ら
れ、しかも高周波領域において使用できる磁性材料を得
ようとするものである。SUMMARY OF THE INVENTION The present invention improves the composition of cobalt-barium-strontium-based ferrite, which is a type of ferro sprayer, to obtain a magnetic material which can obtain a high μQ product and can be used in a high frequency range. It is something to try.
【０００４】[0004]
【課題を解決するための手段】本発明は、六方晶系の磁
性材料、すなわちフェロックスプレーナ系磁性材料の組
成を改良することによって、上記の課題を解決するもの
である。The present invention solves the above-mentioned problems by improving the composition of a hexagonal magnetic material, that is, a ferroscopic planar magnetic material.
【０００５】すなわち、本発明の磁性材料は、 一般式 2CoO ・3(Ba0.5 ・ Sr0.5)O ・ XFe2O3 で表される組成 (X はモル）において 9 ≦Ｘ≦12 である高周波用磁性材料である。Namely, the magnetic material of the present invention have the general formula 2CoO · 3 (Ba 0.5 · Sr 0.5) O · XFe composition represented by 2 O 3 (X mole) for high frequency is 9 ≦ X ≦ 12 at It is a magnetic material.
【０００６】[0006]
【作用】2CoO ・3(Ba0.5 ・ Sr0.5)O ・ XFe2O3 のフェラ
イト量を選択することにより、高周波領域における透磁
率を向上させることができる。また、上記組成の範囲内
で高いμＱ積を得ることができる。By selecting the ferrite content of the action] 2CoO · 3 (Ba 0.5 · Sr 0.5) O · XFe 2 O 3, it is possible to improve the permeability in the high frequency region. Further, a high μQ product can be obtained within the above composition range.
【０００７】[0007]
【実施例】以下、本発明の実施例について説明する。EXAMPLES Examples of the present invention will be described below.
【０００８】まず、本発明による高周波磁性材料の製造
方法について説明する。材料としてCoO 、BaCO3 、SrCO
3 、Fe2O3 を所定の組成となるように秤量し、ボールミ
ルで20時間混合した。これを1200°Ｃの温度で２時間仮
焼し、この仮焼物を遊星ボールミルで粉砕した。これに
バインダー等を加えて成型し、1200〜1300°Ｃの温度で
２時間焼成することによって本発明による材料を得た。First, a method of manufacturing a high frequency magnetic material according to the present invention will be described. CoO, BaCO 3 , SrCO as materials
3 , Fe 2 O 3 were weighed so as to have a predetermined composition, and mixed in a ball mill for 20 hours. This was calcined at a temperature of 1200 ° C. for 2 hours, and the calcined product was pulverized with a planetary ball mill. The material according to the present invention was obtained by adding a binder and the like to the mixture, molding it, and baking it at a temperature of 1200 to 1300 ° C for 2 hours.
【０００９】本発明による高周波用磁性材料の特性の測
定は、通常用いられる短絡同軸法により行った。焼成前
の寸法で外径25mm、内径18mm、厚さ 5mmに成型し、トロ
イダル状のコアを得て各種特性を測定した。測定周波数
は100MHz、300MHz、500MHz、700MHzとした。The characteristics of the magnetic material for high frequency according to the present invention were measured by a commonly used short-circuit coaxial method. Before firing, the outer diameter was 25 mm, the inner diameter was 18 mm, and the thickness was 5 mm, and the toroidal core was obtained and various properties were measured. The measurement frequencies were 100 MHz, 300 MHz, 500 MHz and 700 MHz.
【００１０】以下、上記の測定結果について説明する。
図１は、各々の周波数における透磁率μiac の変化を示
す説明図である。Ｘすなわちフェライトのモル量を横軸
にとり、その時のμiac を縦軸に示したものである。 1
00MHz では 9≦X ≦12の範囲でμiac が 7以上を示し、
この範囲を外れるとこれより小さくなっている。300MH
z、500MHz、700MHzでも同様を傾向を示している。すな
わち、上記の範囲では、透磁率μiac が一様に上昇する
結果が認められた。The above measurement results will be described below.
FIG. 1 is an explanatory diagram showing changes in magnetic permeability μ iac at each frequency. The horizontal axis represents X, that is, the molar amount of ferrite, and the vertical axis represents μ iac at that time. 1
At 00MHz, μ iac is 7 or more in the range 9 ≦ X ≦ 12,
When it goes out of this range, it becomes smaller than this. 300MH
The same tendency is shown at z, 500 MHz, and 700 MHz. That is, it was confirmed that the magnetic permeability μ iac was uniformly increased in the above range.
【００１１】磁性体材料を高周波領域において用いる
と、周波数が上昇するに従ってＱが低下する。そこで、
Ｑの低下と透磁率の上昇との関係をμＱ積を測定するこ
とによって確認した。図２はその結果を示すもので、上
記の範囲においてμＱ積が上昇していることが確認され
た。したがって、この範囲においてインダクタとして用
いる場合に特性の向上の効果が得られることになる。When a magnetic material is used in a high frequency range, Q decreases as the frequency increases. Therefore,
The relationship between the decrease in Q and the increase in magnetic permeability was confirmed by measuring the μQ product. FIG. 2 shows the result, and it was confirmed that the μQ product increased in the above range. Therefore, when used as an inductor in this range, the effect of improving the characteristics can be obtained.
【００１２】図２においては、前記のように周波数が高
くなるにつれてＱが低下することから、μＱ積は周波数
が低いほど大きくなることを示している。周波数が高く
なるほどμＱ積が低下している。図１では周波数が高く
なるほどμが上昇しており、Ｑについては反対の傾向を
有することを示している。FIG. 2 shows that the Q decreases as the frequency increases, as described above, so that the μQ product increases as the frequency decreases. The μQ product decreases as the frequency increases. FIG. 1 shows that μ increases as the frequency increases, and that Q has the opposite tendency.
【００１３】図２におけるμＱ積の変化の状況は、測定
したそれぞれの周波数のいずれにおいても 9≦ X≦12の
範囲では、その両側の値の場合よりも上昇することを示
している。すなわち、フェライトのモル量をこの範囲に
設定すれば、高周波用インダクタの特性を向上させるこ
とができる。The state of change in the μQ product in FIG. 2 indicates that the value rises in the range of 9 ≦ X ≦ 12 at any of the measured frequencies as compared with the case of values on both sides of the range. That is, if the molar amount of ferrite is set within this range, the characteristics of the high frequency inductor can be improved.
【００１４】上記のように、本発明による高周波用磁性
材料はフェライトのモル量の選択によって透磁率μiac
を向上させる効果がある。その効果はＸが10ないし11と
なるときに最も顕著であるが、９以上、12以下の範囲に
おいても従来の同系統の材料よりも上昇している。As described above, the magnetic material for high frequencies according to the present invention has a magnetic permeability μ iac depending on the selection of the molar amount of ferrite.
Has the effect of improving. The effect is most remarkable when X is 10 to 11, but it is higher than the conventional material of the same system in the range of 9 or more and 12 or less.
【００１５】[0015]
【発明の効果】本発明によれば、100MHz以上の高周波領
域において、透磁率の大きい磁性体材料が得られ、しか
も比較的大きなμＱ積を有する磁性材料が得られる。こ
れによって、インダクタンスが大きい、ＵＨＦ帯からそ
れ以上の周波数帯域に適したインダクタ用の磁性材料が
得られる。According to the present invention, a magnetic material having a high magnetic permeability can be obtained in a high frequency region of 100 MHz or more, and a magnetic material having a relatively large μQ product can be obtained. As a result, a magnetic material for an inductor having a large inductance and suitable for a frequency band from the UHF band to a higher frequency band can be obtained.
【００１６】なお、本発明による磁性材料はインダクタ
だけでなく、高周波領域の磁性材料として広く利用でき
る。The magnetic material according to the present invention can be widely used not only as an inductor but also as a magnetic material in a high frequency region.
【図１】本発明による磁性材料の透磁率（μ）特性の説
明図。FIG. 1 is an explanatory diagram of magnetic permeability (μ) characteristics of a magnetic material according to the present invention.
【図２】本発明による磁性材料のμＱ積特性の説明図。FIG. 2 is an explanatory diagram of μQ product characteristics of a magnetic material according to the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 坂倉 光男 埼玉県比企郡玉川村大字玉川字日野原828 番地 東光株式会社玉川工場内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuo Sakakura 828 Hinohara, Tamagawa, Tamagawa-mura, Hiki-gun, Saitama Toko Co., Ltd. Tamagawa factory
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5123433A JP2799128B2 (en) | 1993-04-27 | 1993-04-27 | Magnetic material for high frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5123433A JP2799128B2 (en) | 1993-04-27 | 1993-04-27 | Magnetic material for high frequency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06310322A true JPH06310322A (en) | 1994-11-04 |
| JP2799128B2 JP2799128B2 (en) | 1998-09-17 |
Family
ID=14860457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5123433A Expired - Fee Related JP2799128B2 (en) | 1993-04-27 | 1993-04-27 | Magnetic material for high frequency |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2799128B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000272961A (en) * | 1999-01-18 | 2000-10-03 | Osamu Kimura | Magnetic material for high-frequency use |
| JP2004002110A (en) * | 2002-05-31 | 2004-01-08 | Sanyo Electric Co Ltd | Magnetic ceramic sintered compact and its forming process |
| US6773620B2 (en) | 2002-05-31 | 2004-08-10 | Sanyo Electric Co., Ltd. | Oxide magnetic material and production method of the same |
| US9983836B2 (en) | 2001-05-30 | 2018-05-29 | Intellectual Ventures I Llc | Method and system for communicating between a remote printer and a server |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5032207A (en) * | 1973-07-20 | 1975-03-28 |
-
1993
- 1993-04-27 JP JP5123433A patent/JP2799128B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5032207A (en) * | 1973-07-20 | 1975-03-28 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000272961A (en) * | 1999-01-18 | 2000-10-03 | Osamu Kimura | Magnetic material for high-frequency use |
| US9983836B2 (en) | 2001-05-30 | 2018-05-29 | Intellectual Ventures I Llc | Method and system for communicating between a remote printer and a server |
| JP2004002110A (en) * | 2002-05-31 | 2004-01-08 | Sanyo Electric Co Ltd | Magnetic ceramic sintered compact and its forming process |
| US6773620B2 (en) | 2002-05-31 | 2004-08-10 | Sanyo Electric Co., Ltd. | Oxide magnetic material and production method of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2799128B2 (en) | 1998-09-17 |
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