JPH0642407B2 - Non-magnetic substrate for magnetic head - Google Patents
Non-magnetic substrate for magnetic headInfo
- Publication number
- JPH0642407B2 JPH0642407B2 JP1035150A JP3515089A JPH0642407B2 JP H0642407 B2 JPH0642407 B2 JP H0642407B2 JP 1035150 A JP1035150 A JP 1035150A JP 3515089 A JP3515089 A JP 3515089A JP H0642407 B2 JPH0642407 B2 JP H0642407B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- substrate
- head
- magnetic head
- coefficient
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Magnetic Heads (AREA)
- Hard Magnetic Materials (AREA)
- Thin Magnetic Films (AREA)
Description
【発明の詳細な説明】 産業上の技術分野 本発明は、金属性磁性膜を蒸着するための非磁性の磁気
ヘッド用非磁性基板に関するものである。Description: TECHNICAL FIELD The present invention relates to a non-magnetic substrate for a non-magnetic magnetic head for depositing a metallic magnetic film.
発明の従来技術 従来この種の用途のものとしては、チタン酸バリウム、
チタン酸カルシウム、アルミナ等が使用されていた。し
かしながら、その熱膨張率が磁性膜構造体と大きく異な
っていたため、蒸着した磁性膜構造体が剥離し易かった
り、熱膨張率の差により応力が発生しクラックが発生す
ることがあった。Prior Art of the Invention Conventionally, barium titanate,
Calcium titanate, alumina, etc. were used. However, since the coefficient of thermal expansion is largely different from that of the magnetic film structure, the vapor-deposited magnetic film structure may be easily peeled off, or stress may be generated due to the difference in coefficient of thermal expansion to cause cracking.
さらに、従来の材料は硬さが低く、特に高保磁力テープ
（いわゆるメタルテープ）が使用された場合には、非磁
性基板が磁性膜構造体と硬度及び耐摩耗性が異なり、磁
気テープとの摺動により発生する摩擦のために偏摩耗等
を引き起こし、磁気特性に変化をきたすという問題があ
った。特に硬度が低い場合には、磁気ヘッドの寿命が短
くなったり、あるいは非磁性基板の変形や割れおよび剥
離を引き起こすといった欠点が顕著であった。Further, the conventional material has low hardness, and especially when a high coercive force tape (so-called metal tape) is used, the non-magnetic substrate is different in hardness and abrasion resistance from the magnetic film structure, so that the non-magnetic substrate slides on the magnetic tape. There is a problem in that the friction generated by the movement causes uneven wear and the like, resulting in changes in the magnetic characteristics. In particular, when the hardness is low, the defects that the life of the magnetic head is shortened or the non-magnetic substrate is deformed, cracked or peeled off are remarkable.
発明の構成 即ち、本発明は、CoxNi2-xO2（ただし、0.2≦×＜1.0あ
るいは1.2＜×≦1.8）で表わされ、岩塩型構造を有する
ことを特徴とする磁気ヘッド用非磁性基板に関する。Structure of the Invention That is, the present invention is represented by CoxNi 2 -xO 2 (provided that 0.2 ≦ × <1.0 or 1.2 <× ≦ 1.8) and has a rock salt structure, and is a non-magnetic substrate for a magnetic head. Regarding
発明の具体的説明 本発明は、上記の欠点を解決したもので、具体的には13
0〜150×10-7／℃の熱膨張率を有し、ビッカース硬度50
0〜700kg／mmの特性を持ち、さらに他のヘッド構成材料
間で過度の化学的侵食反応を起こさない材料を提供する
ことが目的である。DETAILED DESCRIPTION OF THE INVENTION The present invention solves the above-mentioned drawbacks.
Has a coefficient of thermal expansion of 0 to 150 x 10 -7 / ° C and a Vickers hardness of 50.
It is an object to provide a material having a property of 0 to 700 kg / mm and not causing an excessive chemical erosion reaction between other head constituent materials.
本発明者等は、かかる観点から多くの材料を検討し、ま
ず、Zn x M y Co2-x-y O2（ただし、ＭはMnまたはNi,0
≦×≦0.4，0.4≦ｙ≦0.8，0.8≦ｘ＋ｙ≦1.0）なる組
成の酸化物を開示した。The present inventors examined many materials from such a viewpoint, and first, Zn x My Co 2 -xy O 2 (where M is Mn or Ni, 0
≦ × ≦ 0.4, 0.4 ≦ y ≦ 0.8, 0.8 ≦ x + y ≦ 1.0) have been disclosed.
しかしながら、ZnOは蒸気圧が高いために焼結しにくく
また組成制御が難しく、その蒸気により炉内を汚染する
ことが判明したためさらに検討を続け、CoxNi2-xO2（た
だし、0.2≦×＜1.0及び1.2＜×≦1.8）なる組成の酸化
物でも同様の特性を有することを見い出した。However, ZnO is difficult sintered hard to also control the composition due to the high vapor pressure, continued further studies because it has been found to contaminate the inside of the furnace by the steam, CoxNi 2 -xO 2 (however, 0.2 ≦ × <1.0 It has been found that oxides having a composition of 1.2 <× ≤ 1.8) have similar characteristics.
第１図は、CoOとNiOの２成分を混合した場合の100〜400
℃の熱膨張率の値を示したものである。これよりＸの範
囲により熱膨張率を容易に調整することができ、磁気ヘ
ッド用基板には上記の組成範囲が望ましいことを見い出
した。Figure 1 shows 100-400 when two components of CoO and NiO are mixed.
It shows the value of the coefficient of thermal expansion at ° C. From this, it has been found that the coefficient of thermal expansion can be easily adjusted by the range of X, and that the above composition range is desirable for the magnetic head substrate.
CoOとNiOを原料とし、通常の粉末冶金的手法によりCoxN
i2-xO2なる緻密で岩塩型構造を有する焼結体を得、硬度
は従来のものより高くテープの摺動による摩耗やエッヂ
部の欠けも少なく、従来の材料よりも優れていることが
確認できた。Using CoO and NiO as raw materials, CoxN
i 2 -xO 2 Sintered body with a dense and rock-salt type structure is obtained, and the hardness is higher than the conventional one, less wear due to tape sliding and chipping of the edge part, and it is superior to conventional materials It could be confirmed.
実施例 組成式CoxNi2-xO2で表わされる酸化物のうち、表１の組
成のものをNiO、CoOより調整した。混合、粉砕はエタノ
ール中湿式ボールミルにて22時間処理した。Example Among the oxides represented by the composition formula CoxNi 2 -xO 2 , those having the composition shown in Table 1 were prepared from NiO and CoO. Mixing and pulverization were performed for 22 hours in a wet ball mill in ethanol.
乾燥後、Ar中1000℃で仮焼し、粉砕後ＣＩＰ成形し、N2
中1350℃で焼結した。得られた材料については、Ｘ線回
折により岩塩型であることを確認した。After drying, calcination in Ar at 1000 ° C, crushing and CIP molding, N 2
Sintered at 1350 ° C in the middle. The obtained material was confirmed to be rock salt type by X-ray diffraction.
それ以外の物性について表１に示す。なお、比較のため
従来品（チタン酸バリウム）の物性も併記した。Other physical properties are shown in Table 1. For comparison, the physical properties of the conventional product (barium titanate) are also shown.
発明の効果 以上説明したように、本組成の非磁性基板は熱膨張率、
硬度とも磁性膜構造体とほぼ同等であるため、剥離やク
ラック発生を防止できる。さらにテープとの摺動による
摩擦からの偏摩耗等も防ぐことができ、ヘッドの耐摩耗
性、耐久性にすぐれている利点がある。 As described above, the nonmagnetic substrate of the present composition has a coefficient of thermal expansion,
Since the hardness is almost the same as that of the magnetic film structure, peeling and cracking can be prevented. Further, it is possible to prevent uneven wear due to friction caused by sliding with the tape, and there is an advantage that the head has excellent wear resistance and durability.
また、蒸気圧の高い酸化物を含んでいないため、組成の
制御が容易であり、さらに焼結時等の炉の汚染の心配も
なく、製造工程上の取扱いが容易で経済的効果も大であ
る。In addition, since it does not contain oxides with high vapor pressure, it is easy to control the composition, there is no concern about contamination of the furnace during sintering, etc., it is easy to handle in the manufacturing process, and the economic effect is great. is there.
第１図は、CoOとNiOを混合し、焼結した場合の100〜400
℃の熱膨張率の値を示す。Figure 1 shows 100-400 when CoO and NiO are mixed and sintered.
The value of the coefficient of thermal expansion in ° C is shown.
Claims (1)
は1.2＜×≦1.8）で表わされ、岩塩型構造を有すること
を特徴とする磁気ヘッド用非磁性基板。1. A non-magnetic substrate for a magnetic head, which is represented by CoxNi 2 -xO 2 (where 0.2 ≦ × <1.0 or 1.2 <× ≦ 1.8) and has a rock salt structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1035150A JPH0642407B2 (en) | 1988-09-30 | 1989-02-16 | Non-magnetic substrate for magnetic head |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24399788 | 1988-09-30 | ||
| JP63-243997 | 1988-09-30 | ||
| JP1035150A JPH0642407B2 (en) | 1988-09-30 | 1989-02-16 | Non-magnetic substrate for magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02168602A JPH02168602A (en) | 1990-06-28 |
| JPH0642407B2 true JPH0642407B2 (en) | 1994-06-01 |
Family
ID=26374086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1035150A Expired - Lifetime JPH0642407B2 (en) | 1988-09-30 | 1989-02-16 | Non-magnetic substrate for magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0642407B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69108874T2 (en) * | 1990-12-12 | 1995-08-24 | Japan Energy Corp | Non-magnetic substrate of a magnetic head, magnetic head and substrate manufacturing processes. |
-
1989
- 1989-02-16 JP JP1035150A patent/JPH0642407B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02168602A (en) | 1990-06-28 |
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