JPS63281207A - Single crystal ferrite - Google Patents
Single crystal ferriteInfo
- Publication number
- JPS63281207A JPS63281207A JP62117358A JP11735887A JPS63281207A JP S63281207 A JPS63281207 A JP S63281207A JP 62117358 A JP62117358 A JP 62117358A JP 11735887 A JP11735887 A JP 11735887A JP S63281207 A JPS63281207 A JP S63281207A
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- mol
- single crystal
- crystal ferrite
- magnetic permeability
- 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.)
- Pending
Links
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 15
- 239000013078 crystal Substances 0.000 title claims abstract description 13
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 15
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims abstract description 14
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910001887 tin oxide Inorganic materials 0.000 claims abstract description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000292 calcium oxide Substances 0.000 claims abstract description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000005291 magnetic effect Effects 0.000 abstract description 14
- 230000035699 permeability Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 7
- 239000011787 zinc oxide Substances 0.000 abstract description 7
- 239000011701 zinc Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ＶＴＲ（ビデオテープレコーダ）等の記録再
生ヘッド素材に使用されるＭｎ−Ｚｎ系の単結晶フェラ
イトに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to Mn--Zn-based single crystal ferrite used for recording/reproducing head materials of VTRs (video tape recorders) and the like.
従来の技術
最近、Ｍｎ−Ｚｎ系の単結晶フェライトは、ＶＴＲ等の
分野で盛んに利用されるようになってきた。従来、一般
的に用いられているＭｎ−Ｚｎ系の単結晶フェライトは
、Ｆｅ２Ｏ３が５０〜７゜モル％、ＺｎＯが１０〜２０
モル％、Ｍ ｎ Ｏが２５〜３５モル％で作られ、磁気
ヘッド用素材として用いられている。しかし近年では、
更に記録密度を上げるために使用周波数の高帯域化が進
められており、単結晶フェライト素材の高透磁率、ある
いはそれと関連する磁気ヘッドのノイズ（Ｎ）と
□キャリヤ出力（Ｃ）の比、すなわちＣ／Ｎ比等につい
てもより高い特性が要求されるようになり、このため従
来の単結晶フェライトでは十分に使用条件を満足し得な
（なり、より良い特性の開発が望まれている。BACKGROUND OF THE INVENTION Recently, Mn--Zn-based single crystal ferrites have been widely used in fields such as VTRs. Conventionally, commonly used Mn-Zn-based single crystal ferrite contains 50 to 7 mol % of Fe2O3 and 10 to 20 mol% of ZnO.
It is made with 25 to 35 mol% of MnO and is used as a material for magnetic heads. However, in recent years,
Furthermore, in order to increase the recording density, the frequency band used is increasing, and the high magnetic permeability of single crystal ferrite material or the related noise (N) of the magnetic head is being improved.
□ Higher characteristics are now required for the carrier output (C) ratio, that is, the C/N ratio, etc., and for this reason, conventional single-crystal ferrite cannot fully satisfy the usage conditions. Development of characteristics is desired.
発明が解決しようとする問題点
しかし、以上のような従来の組成内においては３成分（
Ｆｅ２０３．ＺｎＯ，Ｍｎ０）の組成比率の配分を変え
ることによって、多少の特性改善はあるが、磁気ヘッド
の高帯域化に伴う高透磁率、高Ｃ／Ｎはあまり望めない
という問題を有している。Problems to be Solved by the Invention However, in the conventional composition as described above, three components (
Fe203. Although characteristics can be improved to some extent by changing the composition ratio of ZnO, Mn0), the problem is that high magnetic permeability and high C/N cannot be expected as a result of increasing the bandwidth of the magnetic head.
本発明は、上記問題を解決するもので、ＶＴＲの高帯域
化において、高透磁率、高Ｃ／ ＮのＭｎ−Ｚｎ系の単
結晶フェライトの素材を提供することを目的としたもの
である。The present invention is intended to solve the above-mentioned problems, and aims to provide a Mn-Zn-based single crystal ferrite material with high magnetic permeability and high C/N for use in increasing the bandwidth of VTRs.
問題点を解決するための手段
本発明は、上記問題点の技術的解決手段として、モル百
分率で酸化第二鉄５０〜７０モル％、酸化亜鉛１０〜２
０モル％、酸化マンガン２５〜３５モル％より成るもの
に、酸化錫１〜３モル％と酸化カルシウム０．１〜０．
５モル％とを複合添加することにより上記目的を達成す
るものである。Means for Solving the Problems The present invention provides a technical solution to the above-mentioned problems by using ferric oxide in a molar percentage of 50 to 70 mol% and zinc oxide of 10 to 2 mol%.
0 mol%, manganese oxide 25-35 mol%, tin oxide 1-3 mol% and calcium oxide 0.1-0.
The above object is achieved by adding 5 mol % of the compound in combination.
作 用 本発明の上記技術的手段による作用は次のようになる。For production The effects of the above technical means of the present invention are as follows.
すなわち、従来のＭｎ−Ｚｎ系の単結晶フェライトに酸
化錫を添加することによりフェライト特有のノイズを低
減できるため磁気ヘッドのＣ／ Ｎ向上が図られる。し
かし酸化錫のみの添加ではノイズも減少する一方出力も
低下する。そのために酸化カルシウムを添加する。これ
によって比抵抗が上がりそれに伴って透磁率が上がるた
め、ヘッド出力が大きくなり、高い周波数帯域でのヘッ
ド素材としての使用が可能となる。That is, by adding tin oxide to conventional Mn-Zn-based single crystal ferrite, the noise peculiar to ferrite can be reduced, thereby improving the C/N of the magnetic head. However, while adding only tin oxide reduces noise, it also reduces output. For this purpose, calcium oxide is added. This increases the specific resistance and the magnetic permeability accordingly, increasing the head output and making it possible to use it as a head material in a high frequency band.
実施例 以下、本発明の実施例について説明する。Example Examples of the present invention will be described below.
酸化第二鉄５４モル％、酸化亜鉛１５モル％、酸化マン
ガン２８．９モル％の組成に酸化錫２モル％と酸化カル
シウム０．１モル％を添加して単結晶フェライトを作成
した。その結果Ｃ／Ｎは従来の添加物無しに比べて、１
〜３デシベル良くなり、透磁率に関しても高周波（５〜
１０ＭＨｚ）においても１０９６程良くなっている。又
、１モル％未満または３モル％を超えた酸化錫と、０．
１モル未満または０．５モル％を超えた酸化カルシウム
を添加してみた所、Ｃ／Ｎ、透磁率共に従来の単結晶フ
ェライトに比べて良くなかった。このように、１〜３モ
ル％の酸化錫と０．１〜０．５モル％の酸化カルシウム
からなる２種類の添加物の単結晶フェライトへの添加は
特性において、著しい向上が認められ、その効果は大で
ある。A single crystal ferrite was prepared by adding 2 mol% of tin oxide and 0.1 mol% of calcium oxide to a composition of 54 mol% of ferric oxide, 15 mol% of zinc oxide, and 28.9 mol% of manganese oxide. As a result, the C/N was 1
~3 decibels better, and magnetic permeability also improved at high frequencies (5 ~
10MHz) is also about 1096 better. Furthermore, less than 1 mol % or more than 3 mol % of tin oxide, and 0.
When less than 1 mol or more than 0.5 mol % of calcium oxide was added, both C/N and magnetic permeability were not as good as conventional single crystal ferrite. In this way, the addition of two types of additives, consisting of 1 to 3 mol% tin oxide and 0.1 to 0.5 mol% calcium oxide, to single-crystal ferrite significantly improved its properties. The effect is great.
発明の効果
以上のように本発明によれば、酸化第二鉄、酸化亜鉛、
酸化マンガンからなるものに更に酸化錫と酸化カルシウ
ムを添加することによりｃ ／ Ｎ 。Effects of the Invention As described above, according to the present invention, ferric oxide, zinc oxide,
c/N by further adding tin oxide and calcium oxide to what consists of manganese oxide.
透磁率が向上し、高帯域化に伴う高密度記録化に充分対
応することが可能となり、実用的な効果は大きい。Magnetic permeability is improved, and it becomes possible to sufficiently respond to high-density recording accompanying high-bandwidth, which has a great practical effect.
Claims (1)
モル％、酸化亜鉛（ＺｎＯ）１０〜２０モル％、酸化マ
ンガン（ＭｎＯ）２５〜３５モル％より成るものに、酸
化錫（ＳｎＯ＿２）１〜３モル％と酸化カルシウム（Ｃ
ａＯ）０．１〜０．５モル％とを添加したことを特徴と
する単結晶フェライト。Ferric oxide (Fe_2O_3) in mole percentage 50-70
mol%, zinc oxide (ZnO) 10-20 mol%, manganese oxide (MnO) 25-35 mol%, tin oxide (SnO_2) 1-3 mol% and calcium oxide (C
A single crystal ferrite characterized in that 0.1 to 0.5 mol% of aO) is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62117358A JPS63281207A (en) | 1987-05-14 | 1987-05-14 | Single crystal ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62117358A JPS63281207A (en) | 1987-05-14 | 1987-05-14 | Single crystal ferrite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63281207A true JPS63281207A (en) | 1988-11-17 |
Family
ID=14709706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62117358A Pending JPS63281207A (en) | 1987-05-14 | 1987-05-14 | Single crystal ferrite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63281207A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5683008A (en) * | 1979-12-12 | 1981-07-07 | Hitachi Metals Ltd | Single crystal ferrite |
| JPS60132302A (en) * | 1983-12-20 | 1985-07-15 | Sumitomo Special Metals Co Ltd | Oxide magnetic material |
| JPS61252609A (en) * | 1985-05-01 | 1986-11-10 | Tohoku Metal Ind Ltd | Magnetic material of low-loss oxide |
-
1987
- 1987-05-14 JP JP62117358A patent/JPS63281207A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5683008A (en) * | 1979-12-12 | 1981-07-07 | Hitachi Metals Ltd | Single crystal ferrite |
| JPS60132302A (en) * | 1983-12-20 | 1985-07-15 | Sumitomo Special Metals Co Ltd | Oxide magnetic material |
| JPS61252609A (en) * | 1985-05-01 | 1986-11-10 | Tohoku Metal Ind Ltd | Magnetic material of low-loss oxide |
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