JPH0717762A - Nonmagnetic ceramics for magnetic head - Google Patents
Nonmagnetic ceramics for magnetic headInfo
- Publication number
- JPH0717762A JPH0717762A JP5143226A JP14322693A JPH0717762A JP H0717762 A JPH0717762 A JP H0717762A JP 5143226 A JP5143226 A JP 5143226A JP 14322693 A JP14322693 A JP 14322693A JP H0717762 A JPH0717762 A JP H0717762A
- Authority
- JP
- Japan
- Prior art keywords
- ceramics
- magnetic head
- magnetic
- nonmagnetic
- znfe
- 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
Landscapes
- Hard Magnetic Materials (AREA)
- Magnetic Ceramics (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，磁気ヘッドの一部に構
成されるスライダー等に使用される非磁性セラミックス
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonmagnetic ceramic used for a slider or the like which is part of a magnetic head.
【０００２】[0002]
【従来の技術】一般に，コンピュータ，ＶＴＲ，オーデ
ィオ関係の磁気ヘッドは，磁性材料であるフェライトと
非磁性セラミックスをガラス又は樹脂でボンディングし
て製造されている。2. Description of the Related Art Generally, magnetic heads for computers, VTRs, and audios are manufactured by bonding ferrite, which is a magnetic material, and nonmagnetic ceramics with glass or resin.
【０００３】従来，この様な磁性材料と非磁性材料によ
り磁気ヘッドを構成する場合には，磁性材料にＭｎ−Ｚ
ｎフェライト又はＮｉ−Ｚｎフェライトを使用し，非磁
性材料にＢａＴｉＯ3 ，ＣａＴｉＯ3 ，ＺｎＦｅ
2 Ｏ4 ，Ｆｅ2 Ｏ3 等のセラミックスやＦｅ2 Ｏ3 ＋Ｚ
ｎＦｅ2 Ｏ4 複合セラミックスを使用するのが一般的で
あった。Conventionally, when a magnetic head is composed of such a magnetic material and a non-magnetic material, the magnetic material is Mn--Z.
using n ferrite or Ni-Zn ferrite, BaTiO 3 in the non-magnetic material, CaTiO 3, ZnFe
Ceramics such as 2 O 4 , Fe 2 O 3 and Fe 2 O 3 + Z
It was common to use nFe 2 O 4 composite ceramics.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら，ＢａＴ
ｉＯ3 ，ＣａＴｉＯ3 等のセラミックスを使用する磁気
ヘッドは，磁気テープやディスクとの長時間摺動時に摩
擦係数が増大し，摺動特性が悪化するという問題を有し
ていた。[Problems to be Solved by the Invention] However, BaT
A magnetic head using a ceramic such as iO 3 or CaTiO 3 has a problem that the friction coefficient increases during long-time sliding with a magnetic tape or a disk, and sliding characteristics deteriorate.
【０００５】一方，ＺｎＦｅ2 Ｏ4 は，摺動特性は良い
が，熱膨張係数が小さいという欠点を有していた。On the other hand, ZnFe 2 O 4 has good sliding characteristics, but has a drawback that the coefficient of thermal expansion is small.
【０００６】また，ＺｎＦｅ2 Ｏ4 材の摺動特性を生か
し，熱膨張係数を改善したＦｅ2 Ｏ3 ＋ＺｎＦｅ2 Ｏ4
複合セラミックスからなる材料は，加工時にチッピング
が発生しやすいという欠点を有していた。Further, ZnFe 2 O 4 material taking advantage of the sliding characteristics, Fe 2 O 3 + ZnFe 2 O 4 with improved thermal expansion coefficient
The material consisting of composite ceramics had the drawback that chipping was likely to occur during processing.
【０００７】そこで，本発明の技術的課題は，加工時の
チッピングが発生しにくい（加工性の良い）磁気ヘッド
に用いられる非磁性のＦｅ2 Ｏ3 ＋ＺｎＦｅ2 Ｏ4 複合
セラミックスを提供することにある。Therefore, a technical problem of the present invention is to provide a non-magnetic Fe 2 O 3 + ZnFe 2 O 4 composite ceramics used in a magnetic head in which chipping is less likely to occur during processing (good in processability). is there.
【０００８】[0008]
【課題を解決するための手段】本発明では，上記課題を
解決するために，フェライトの一成分であり，熱膨張係
数の大きなＦｅ2 Ｏ3 と，摺動特性の良好なＺｎＦｅ2
Ｏ4 との複合構造を有する非磁性セラミックスの結晶粒
径を，添加物を適切に選択することにより，微細に制御
し，加工性を改善したものである。In the present invention, in order to solve the above-mentioned problems, Fe 2 O 3 which is a component of ferrite and has a large coefficient of thermal expansion and ZnFe 2 which has a good sliding property.
The crystal grain size of the non-magnetic ceramics having a composite structure with O 4 is finely controlled and the workability is improved by appropriately selecting additives.
【０００９】本発明によれば，Ｆｅ2 Ｏ3 相とＺｎＦｅ
2 Ｏ4 相との複合構造から成るセラミックス１００重量
部に対し，副成分としてＹ2 Ｏ3 ，Ｌａ2 Ｏ3 ，ＣｅＯ
2 ，Ａｌ2 Ｏ3 ，ＺｒＯ2 ，ＴｉＯ2 の１種又は２種以
上を０．０１〜５ｗｔ％添加して成ることを特徴とする
磁気ヘッド用非磁性セラミックスが得られる。According to the invention, the Fe 2 O 3 phase and the ZnFe
With respect to 100 parts by weight of a ceramic having a composite structure with a 2 O 4 phase, Y 2 O 3 , La 2 O 3 , and CeO were added as auxiliary components.
A non-magnetic ceramic for a magnetic head is obtained, which is obtained by adding 0.01 to 5 wt% of one kind or two or more kinds of 2 , Al 2 O 3 , ZrO 2 , and TiO 2 .
【００１０】即ち，本発明においては，Ｆｅ2 Ｏ3 ＋Ｚ
ｎＦｅ2 Ｏ4 材に，Ｙ2 Ｏ3 ，Ｌａ2 Ｏ3 ，ＣｅＯ2 ，
Ａｌ2 Ｏ3 ，ＺｒＯ2 ，ＴｉＯ2 の一種又は二種以上を
０．０１〜５ｗｔ％添加することにより結晶粒径を微細
に制御することが可能となり，加工時チッピング抑制に
効果を持たせたものである。ここで，本発明において，
添加物の量を０．０１〜５ｗｔ％と限定したのは，０．
０１ｗｔ％以下では，結晶制御に効果はなく，５ｗｔ％
を越えると，結晶粒界に添加物成分が析出し，強度，硬
度の低下をもたらすからである。That is, in the present invention, Fe 2 O 3 + Z
nFe 2 O 4 material, Y 2 O 3 , La 2 O 3 , CeO 2 ,
By adding one or more of Al 2 O 3 , ZrO 2 and TiO 2 in an amount of 0.01 to 5 wt%, it becomes possible to finely control the crystal grain size, and it is possible to suppress chipping during processing. It is a thing. Here, in the present invention,
The reason for limiting the amount of additive to 0.01 to 5 wt% is that
Below 01 wt%, there is no effect on crystal control,
If it exceeds, the additive component will be precipitated at the crystal grain boundaries, resulting in a decrease in strength and hardness.
【００１１】[0011]
【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.
【００１２】市販の原料であるＦｅ2 Ｏ3 ，ＺｎＯをそ
れぞれ８０モル％，２０モル％とし，Ｆｅ2 Ｏ3 ＋Ｚｎ
Ｏ １００重量部に対し，Ｙ2 Ｏ3 ，Ｌａ2 Ｏ3 ，Ｃｅ
Ｏ2，Ａｌ2 Ｏ3 ，ＺｒＯ2 ，ＴｉＯ2 を下表１となる
様に秤量した。ボールミルにて湿式混合（２４時間）し
た後乾燥し，１０００℃の温度で仮焼を行った。さらに
ボールミルにて湿式粉砕，乾燥後ＰＶＡ系バインダーを
１％添加し，スプレードライヤーにて造粒を行った。造
粒粉を１〜２ｔｏｎ／ｃｍ2 の圧力で金型成形し，大気
中にて１０００〜１２００℃，３時間焼結を行った。焼
結後９００℃〜１１００℃ １０００ｋｇｆ／ｃｍ2 の
圧力にて２時間Ａｒガス雰囲気中にて熱間静水圧プレス
処理を行った。[0012] 80 mol% Fe 2 O 3 is a commercially available material, ZnO, respectively, and 20 mol%, Fe 2 O 3 + Zn
With respect to 100 parts by weight of O, Y 2 O 3 , La 2 O 3 , Ce
O 2 , Al 2 O 3 , ZrO 2 and TiO 2 were weighed so as to be in Table 1 below. After wet-mixing (24 hours) with a ball mill, it was dried and calcined at a temperature of 1000 ° C. Further, after wet pulverization with a ball mill and drying, 1% of PVA-based binder was added, and granulation was performed with a spray dryer. The granulated powder was die-molded at a pressure of 1 to 2 ton / cm 2 and sintered in the atmosphere at 1000 to 1200 ° C. for 3 hours. After sintering, hot isostatic pressing was performed in an Ar gas atmosphere at 900 ° C to 1100 ° C and a pressure of 1000 kgf / cm 2 for 2 hours.
【００１３】以上の工程より得られた試料全てにおいて
Ｆｅ2 Ｏ3 相及びＺｎＦｅ2 Ｏ4 相が確認された。全試
料について熱膨張係数ビッカース硬度，抗析強度，結晶
粒径，気孔率，チッピング発生数を測定した。その結果
を下表１に示す。チッピング発生数は，試料を鏡面加工
し， #８００砥石にて溝加工した時に稜部に発生した２
μｍ以上のチッピングを光学顕微鏡にて観察し，単位長
さ当りのチッピング発生数に換算したものである。Fe 2 O 3 phase and ZnFe 2 O 4 phase were confirmed in all the samples obtained by the above steps. The thermal expansion coefficient Vickers hardness, the segregation strength, the crystal grain size, the porosity, and the number of chippings were measured for all the samples. The results are shown in Table 1 below. The number of chipping occurrences was 2 at the ridge when the sample was mirror-finished and grooved with # 800 grindstone.
The chippings of μm or more are observed with an optical microscope and converted into the number of chippings generated per unit length.
【００１４】[0014]
【表１】 [Table 1]
【００１５】表１から無添加のＮｏ．１と本発明例のＮ
ｏ．２，３，４，５，６，７，８，９，１０を比較する
と，本発明例は，結晶粒径が微細化し，加工時に発生す
るチッピングが少ないことがわかる。From Table 1, No. 1 and N of the present invention example
o. Comparing Nos. 2, 3, 4, 5, 6, 7, 8, 9, and 10, it can be seen that in the examples of the present invention, the crystal grain size becomes finer and less chipping occurs during processing.
【００１６】即ち，Ｙ2 Ｏ3 ，Ｌａ2 Ｏ3 ，ＣｅＯ2 ，
Ａｌ2 Ｏ3 ，ＺｒＯ2 ，ＴｉＯ2 の１種又は２種以上
が，０．０１〜５ｗｔ％以内の添加量の時，効果がある
ことがわかる。しかし，前記添加物が，０．０１ｗｔ％
より少ない場合（比較例Ｎｏ．１１，１２）には，結晶
粒径の微細化が起こらず，加工時のチッピング発生も多
い。また，５．０ｗｔ％を越えると，気孔率が大きくな
り，ビッカース硬度，抗析強度の低下が認められる。That is, Y 2 O 3 , La 2 O 3 , CeO 2 ,
It can be seen that when one or more of Al 2 O 3 , ZrO 2 , and TiO 2 is added in an amount of 0.01 to 5 wt%, it is effective. However, if the additive is 0.01 wt%
When the number is smaller (Comparative Examples Nos. 11 and 12), the crystal grain size is not reduced, and chipping often occurs during processing. On the other hand, if it exceeds 5.0 wt%, the porosity becomes large, and the Vickers hardness and the segregation strength are decreased.
【００１７】以上，本発明の実施例において，Ｆｅ2 Ｏ
3 相及びＺｎＦｅ2 Ｏ4 相から成るセラミックスに，Ｙ
2 Ｏ3 ，Ｌａ2 Ｏ3 ，ＣｅＯ2 ，Ａｌ2 Ｏ3 ，Ｚｒ
Ｏ2 ，ＴｉＯ2 の１種又は２種以上を０．０１〜５ｗｔ
％添加することにより，加工時のチッピングが発生しに
くく，加工性に優れた磁気ヘッド用非磁性セラミックス
が得られた。As described above, in the embodiment of the present invention, Fe 2 O
Ceramics consisting of 3 phase and ZnFe 2 O 4 phase, Y
2 O 3 , La 2 O 3 , CeO 2 , Al 2 O 3 , Zr
0.01 to 5 wt% of O 2 or TiO 2
%, It was possible to obtain non-magnetic ceramics for magnetic heads, which were less likely to cause chipping during processing and had excellent workability.
【００１８】[0018]
【発明の効果】以上の説明から明らかな様に，本発明に
よれば，摺動特性が良好で，加工性に優れた，高密度非
磁性セラミックスを容易に製造可能である。As is apparent from the above description, according to the present invention, it is possible to easily manufacture high-density nonmagnetic ceramics having good sliding characteristics and excellent workability.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ１１Ｂ 5/187 Ｆ 7303−5Ｄ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location G11B 5/187 F 7303-5D
Claims (1)
合構造から成るセラミックス１００重量部に対し，副成
分としてＹ2 Ｏ3 ，Ｌａ2 Ｏ3 ，ＣｅＯ2 ，Ａｌ
2 Ｏ3 ，ＺｒＯ2 ，ＴｉＯ2 の１種又は２種以上を０．
０１〜５ｗｔ％添加して成ることを特徴とする磁気ヘッ
ド用非磁性セラミックス。1. To 100 parts by weight of a ceramic having a composite structure of an Fe 2 O 3 phase and a ZnFe 2 O 4 phase, Y 2 O 3 , La 2 O 3 , CeO 2 , Al as auxiliary components are added.
2 O 3 , ZrO 2 , and TiO 2 may be used alone or in combination of two or more.
A non-magnetic ceramic for a magnetic head, which is characterized by being added by 01 to 5 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14322693A JP3460091B2 (en) | 1993-06-15 | 1993-06-15 | Non-magnetic ceramics for magnetic heads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14322693A JP3460091B2 (en) | 1993-06-15 | 1993-06-15 | Non-magnetic ceramics for magnetic heads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0717762A true JPH0717762A (en) | 1995-01-20 |
| JP3460091B2 JP3460091B2 (en) | 2003-10-27 |
Family
ID=15333836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14322693A Expired - Fee Related JP3460091B2 (en) | 1993-06-15 | 1993-06-15 | Non-magnetic ceramics for magnetic heads |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3460091B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094558A (en) * | 2012-12-18 | 2013-05-08 | 深圳市贝特瑞新能源材料股份有限公司 | Zinc-ferrite-based nanometer composite as well as preparation method and application thereof |
| US8580069B2 (en) | 2003-03-07 | 2013-11-12 | Kuraray Co., Ltd. | Plastic bonding method |
| CN103413921A (en) * | 2013-08-26 | 2013-11-27 | 中国科学技术大学 | Spinel magnetic ferrite/molybdenum disulfide nanometer composite material as well as preparation method and application thereof |
-
1993
- 1993-06-15 JP JP14322693A patent/JP3460091B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8580069B2 (en) | 2003-03-07 | 2013-11-12 | Kuraray Co., Ltd. | Plastic bonding method |
| CN103094558A (en) * | 2012-12-18 | 2013-05-08 | 深圳市贝特瑞新能源材料股份有限公司 | Zinc-ferrite-based nanometer composite as well as preparation method and application thereof |
| CN103413921A (en) * | 2013-08-26 | 2013-11-27 | 中国科学技术大学 | Spinel magnetic ferrite/molybdenum disulfide nanometer composite material as well as preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3460091B2 (en) | 2003-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS62250506A (en) | Substrate material | |
| JPH0717762A (en) | Nonmagnetic ceramics for magnetic head | |
| US5432016A (en) | Magnetic head slider material | |
| JPH0122229B2 (en) | ||
| JPS6140869A (en) | Ceramic composition for magnetic head reinforcement | |
| JPH07108811B2 (en) | Non-magnetic ceramic material for magnetic head | |
| JP2832863B2 (en) | Non-magnetic ceramics for magnetic heads | |
| JPH05319896A (en) | Nonmagnetic ceramics | |
| JPS6158428B2 (en) | ||
| KR970006797B1 (en) | Non-magnetic ceramic substrate material for magnetic head | |
| JPH04238861A (en) | Ceria stabilized zirconia/alpha-alumina/lanthanum-based beta-alumina compounded sintered material | |
| JP3078302B2 (en) | Non-magnetic ceramic composition | |
| JP3085619B2 (en) | Non-magnetic ceramics | |
| JPS6359984B2 (en) | ||
| KR0137076B1 (en) | Non-magnetic ceramic substrate for magnetic head | |
| JPS6029669B2 (en) | Non-magnetic ceramics for magnetic heads | |
| JPH0798687B2 (en) | Non-magnetic ceramics for magnetic heads | |
| JPS62292672A (en) | Ceramic composition for magnetic head | |
| JPS63134559A (en) | Non-magnetic ceramics for magnetic head | |
| JPH06157128A (en) | Nonmagnetic ceramics | |
| JPS6339115A (en) | Substrate material for thin film magnetic head | |
| JPS59131571A (en) | Ceramic composition for magnetic head | |
| JPS63170262A (en) | Manufacture of zr02-tic-sic base sintered body | |
| JPH0797262A (en) | Nonmagnetic ceramics for magnetic heads | |
| JPH0459264B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20030716 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090815 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090815 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100815 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100815 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110815 Year of fee payment: 8 |
|
| LAPS | Cancellation because of no payment of annual fees |