JPH0122220B2 - - Google Patents
Info
- Publication number
- JPH0122220B2 JPH0122220B2 JP59242389A JP24238984A JPH0122220B2 JP H0122220 B2 JPH0122220 B2 JP H0122220B2 JP 59242389 A JP59242389 A JP 59242389A JP 24238984 A JP24238984 A JP 24238984A JP H0122220 B2 JPH0122220 B2 JP H0122220B2
- Authority
- JP
- Japan
- Prior art keywords
- less
- slider
- added
- ferrite
- slider material
- 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
Links
- 239000000463 material Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 7
- 239000011521 glass Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910018605 Ni—Zn Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Magnetic Heads (AREA)
Description
〔産業上の利用分野〕
本発明はFDD磁気ヘツド用スライダー材の製
造方法に関するものである。
〔従来技術とその問題点〕
従来FDD磁気ヘツド用スライダー材には、
TiBaO3、TiCaO3系スライダー材を用いている
が、上記スライダー材は熱膨張係数、耐摩耗性は
フエライトに近いが、ガラスとの反応性、特に気
泡発生の面で問題が残る。また、ガラス接合時に
還元雰囲気中で熱処理する場合は、上記スライダ
ーが変色する問題が残る。
〔発明の目的〕
したがつて発明の目的は、耐摩耗性が大きく、
熱膨張係数がフエライトに近く、而もガラスとの
反応性がよく気泡の発生がなく、変色することの
ないスライダー材の製造方法を得ようとするもの
である。
〔発明の構成〕
本発明は、ガラスは、TiBaO3、TiCaO3とよ
りもフエライトとの方がぬれ性が良く、気泡の発
生が少ないことにより、フエライトの１成分であ
るFe2O3を出発原料とし第２成分を添加し、添加
量を適当に選ぶことにより還元雰囲気中の熱処理
においても変色がなく熱膨張係数が制御されたス
ライダー材を製造しようというものである。
すなわち、本発明によれば、FDD磁気ヘツド
用スライダー材を製造する方法であつて、主成分
であるFe2O3に対し、副成分として40wt％以下の
Al2O3、40wt％以下のZrO2、40wt％以下の
SnO2、40wt％以下のCeO2、30wt％以下のZnO、
および20wt％以下のTiO2のうちの１種又は２種
以上を、合計が0.1〜40wt％以下になるように添
加し、これをボールミルで湿式混合し、この混合
物にPVA等のバインダーを添加し、スプレード
ライヤー等により顆粒を作り、金型プレス等の通
常の成形方法により成型した成型体を大気中で
1000℃以上の温度で焼成し、焼結体を得る。
実施例
Fe2O3と、Al2O3、TiO2、ZrO2、SnO2、CeO2、
ZnOを表1Aおよび表1Bに示す添加量を単独に秤
量し、これらを鋼製ボールミルにて、24時間湿式
混合した後、PVAなどのバインダーを１％添加
し、スプレードライヤーなどにより顆粒を作り、
金型プレスなどの通常の成型方法により所定の形
状に成型した。この成型体を、大気中1100℃で３
時間保持し、焼成した。熱膨張係数測定用試料
は、３×３×15mmの試料を、焼成体より切り出し
て作成した。結果を表１（表1Aおよび表1B）に
示す。比較のために表２に従来のBaTiO3、
CaTiO3系スライダー材の簡単な特性を示す。こ
の作成した試料をガラスと接触させ還元性雰囲気
中で800℃〜1000℃の温度で熱処理して接合試験
を行つた結果、主成分Fe2O3に表1A、表1Bに示
した添加物を加えた全試料において、気泡の発生
は見られず、変色も全くなかつた。なおこの熱処
理では表1A及び表1Bに見られる諸特性は変化し
ない。
[Industrial Application Field] The present invention relates to a method of manufacturing a slider material for an FDD magnetic head. [Prior art and its problems] Conventional slider materials for FDD magnetic heads include:
TiBaO 3 and TiCaO 3 based slider materials are used, and although the coefficient of thermal expansion and abrasion resistance of these slider materials are close to those of ferrite, problems remain in terms of reactivity with glass, particularly in terms of bubble generation. Furthermore, if heat treatment is performed in a reducing atmosphere during glass bonding, the problem of discoloration of the slider remains. [Object of the invention] Therefore, the object of the invention is to provide a material with high wear resistance and
The object of the present invention is to provide a method for producing a slider material that has a coefficient of thermal expansion close to that of ferrite, has good reactivity with glass, does not generate bubbles, and does not change color. [Structure of the Invention] The present invention uses glass starting from Fe 2 O 3 , which is one component of ferrite, because ferrite has better wettability and less bubble generation than TiBaO 3 and TiCaO 3 . By adding a second component as a raw material and appropriately selecting the amount added, it is possible to produce a slider material that does not discolor even during heat treatment in a reducing atmosphere and has a controlled coefficient of thermal expansion. That is, according to the present invention, there is provided a method for manufacturing a slider material for an FDD magnetic head, in which 40 wt% or less of Fe 2 O 3 as a main component is added as a subcomponent.
Al 2 O 3 , 40wt% or less ZrO 2 , 40wt% or less
SnO 2 , CeO 2 up to 40wt%, ZnO up to 30wt%,
and 20 wt% or less of TiO 2 are added so that the total is 0.1 to 40 wt% or less, this is wet mixed in a ball mill, and a binder such as PVA is added to this mixture. , make granules using a spray dryer, etc., and mold the molded body using a normal molding method such as a mold press in the air.
A sintered body is obtained by firing at a temperature of 1000℃ or higher. Example Fe 2 O 3 , Al 2 O 3 , TiO 2 , ZrO 2 , SnO 2 , CeO 2 ,
Weigh out the amount of ZnO shown in Tables 1A and 1B, wet mix them in a steel ball mill for 24 hours, add 1% of a binder such as PVA, and make granules with a spray dryer.
It was molded into a predetermined shape using a normal molding method such as die pressing. This molded body was heated to 1100℃ in the atmosphere for 3
Hold for an hour and bake. A sample for measuring the coefficient of thermal expansion was prepared by cutting a sample of 3 x 3 x 15 mm from the fired body. The results are shown in Table 1 (Table 1A and Table 1B). For comparison, Table 2 shows conventional BaTiO 3 ,
A simple characteristic of CaTiO 3 -based slider material is shown. A bonding test was conducted by contacting the prepared sample with glass and heat-treating it at a temperature of 800℃ to 1000℃ in a reducing atmosphere. As a result, the main component Fe 2 O 3 contained the additives shown in Tables 1A and 1B. In all the samples added, no bubbles were observed and there was no discoloration at all. Note that this heat treatment does not change the properties shown in Tables 1A and 1B.
【表】【table】
【表】
一方Ni−Zn系フエライトの熱膨張係数αがふ
つう70〜100（×10-7℃）、MnZn系フエライトの
αはふつう90〜130（×10-7℃）であり、ガラス、
フエライト、セラミツクスライダーの割れが±５
×10-7℃程度で顕著に生じることを考えると、ス
ライダー材料として備えるべきαの範囲は70〜
130（×10-7℃）にあることが必要であり、又ビツ
カース硬さHVが少なくとも550は必要である。
従つて表1Aおよび表1Bから、ZrO2、SnO2、
CeO2は40wt％以下、ZnOは30wt％以下、TiO2は
20wt％以下のものは上記の要求をほぼ満足させ
る。なお副成分を40％より更に多く加えても、一
応上記のαとHVの限界を満足するが、鏡面性が
劣化するので好ましくない。又表1Aおよび表1B
から分るように、添加物が０の場合すなわち
Fe2O3のみの場合は、粒子の大きさが10μｍもあ
つて接合力が弱くなつて信頼性が低下するので、
添加物についても好ましい下限界が０に近いとこ
ろにあるわけであるが、焼結温度などによつて変
化するので一概に何％と限定することはできな
い。ただその限界が0.1％以下のところにある場
合には、その量の制御の難かしさから、実際には
0.1％以下にすることは好ましくない。因みに参
考までに表２に示した[Table] On the other hand, the coefficient of thermal expansion α of Ni-Zn ferrite is usually 70 to 100 (×10 -7 ℃), and that of MnZn ferrite is usually 90 to 130 (×10 -7 ℃).
Cracks in ferrite and ceramic sliders are ±5
Considering that this phenomenon occurs significantly at temperatures around
130 (×10 -7 ℃), and the Vickers hardness H V must be at least 550. Therefore, from Table 1A and Table 1B, ZrO 2 , SnO 2 ,
CeO2 is below 40wt%, ZnO is below 30wt%, TiO2 is
A substance with a content of 20wt% or less almost satisfies the above requirements. It should be noted that even if more than 40% of the subcomponent is added, the above-mentioned limits of α and H V are satisfied, but this is not preferable because the specularity deteriorates. Also Table 1A and Table 1B
As you can see, when the additive is 0, i.e.
In the case of only Fe 2 O 3 , the particle size is as much as 10 μm, which weakens the bonding force and reduces reliability.
The preferable lower limit for additives is close to 0, but since it changes depending on the sintering temperature, etc., it is not possible to set a specific percentage. However, if the limit is below 0.1%, it is difficult to control the amount, so in reality
It is not preferable to keep it below 0.1%. For reference, Table 2 shows
【表】【table】
【表】
従来のスライダーの特性によれば、従来のスライ
ダーの粒子の大きさは約5μｍである。
次に２種又は３種の副成分を添加した実施例を
説明する。表３は添加した成分と得られたスライ
ダーの特性を示したものである。この表３の示す
データは、添加するものの種類は増加しても、そ
の合計を単位してみれば、個々のものについては[Table] According to the characteristics of the conventional slider, the particle size of the conventional slider is about 5 μm. Next, examples in which two or three types of subcomponents are added will be described. Table 3 shows the added components and the characteristics of the obtained slider. The data shown in Table 3 shows that even though the types of things added increase, if you look at the total as a unit, the individual things
【表】
先に述べたように40wt％、30wt％、20wt％の範
囲内におく限り、合計を40％以下にすればよいこ
とが分る。但し下限については先に述べたように
0.1wt％にすればよい。
〔発明の効果〕
以上の説明から明らかなように、本発明による
Fe2O3系スライダーは、熱膨張係数αおよびビツ
カース硬さHVに必要な条件を満たし、更に接合
性が良好で、気泡の発生がなく、変色も起らな
い。[Table] As mentioned earlier, as long as it is kept within the ranges of 40wt%, 30wt%, and 20wt%, it can be seen that the total should be 40% or less. However, as mentioned above, the lower limit
It should be 0.1wt%. [Effects of the Invention] As is clear from the above explanation, the present invention achieves
The Fe 2 O 3 slider satisfies the necessary conditions for thermal expansion coefficient α and Vickers hardness H V , and also has good bonding properties, does not generate bubbles, and does not cause discoloration.
Claims (1)
方法であつて、主成分であるFe2O3に対し、副成
分として40wt％以下のAl2O3、40wt％以下の
ZrO2、40wt％以下のSnO2、40wt％以下のCeO2、
30wt％以下のZnO、および20wt％以下のTiO2の
うちの１種又は２種以上を、合計が0.1〜40wt％
になるように添加し、1000℃以上の温度で焼成を
行うことを特徴とするFe2O3系スライダー材の製
造方法。1 A method of manufacturing a slider material for an FDD magnetic head, which comprises Fe 2 O 3 as the main component, Al 2 O 3 as subcomponents of 40 wt% or less, and 40 wt% or less of Al 2 O 3 as subcomponents.
ZrO 2 , SnO 2 up to 40wt%, CeO 2 up to 40wt%,
One or more of ZnO of 30wt% or less and TiO 2 of 20wt% or less, with a total of 0.1 to 40wt%.
A method for producing Fe 2 O 3-based slider material, which is characterized by adding Fe 2 O 3 so that the Fe 2 O 3-based slider material becomes
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59242389A JPS61146751A (en) | 1984-11-19 | 1984-11-19 | Manufacture of fe2o3 slider material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59242389A JPS61146751A (en) | 1984-11-19 | 1984-11-19 | Manufacture of fe2o3 slider material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61146751A JPS61146751A (en) | 1986-07-04 |
| JPH0122220B2 true JPH0122220B2 (en) | 1989-04-25 |
Family
ID=17088425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59242389A Granted JPS61146751A (en) | 1984-11-19 | 1984-11-19 | Manufacture of fe2o3 slider material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61146751A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0912366A (en) * | 1995-06-28 | 1997-01-14 | Hitachi Metals Ltd | Nonmagnetic substrate and slider for levitation type magnetic head using same |
-
1984
- 1984-11-19 JP JP59242389A patent/JPS61146751A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61146751A (en) | 1986-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS59152266A (en) | Zirconia refractories | |
| JPH0122220B2 (en) | ||
| JPS58139322A (en) | Porcelain composition used for magnetic head fastener | |
| JPS6340762A (en) | Ceramic material for electronic circuit package | |
| JPH0469103B2 (en) | ||
| JPS62292672A (en) | Ceramic composition for magnetic head | |
| JPS59190265A (en) | High strength zirconia ceramic | |
| JPS6029669B2 (en) | Non-magnetic ceramics for magnetic heads | |
| JPH0345024B2 (en) | ||
| JPS58143427A (en) | Ceramic blank body for magnetic head retainer | |
| JPH01320264A (en) | Production of alumina-series ceramic | |
| JPH01320263A (en) | Production of alumina-series ceramic | |
| SU1728192A1 (en) | Refractory paste for preparation of ceramic articles | |
| JP3078302B2 (en) | Non-magnetic ceramic composition | |
| JPH0664930B2 (en) | Porcelain composition for magnetic head | |
| JPH022823B2 (en) | ||
| JPH03189055A (en) | Manufacture of refractory for continuous casting | |
| JPS59102867A (en) | Ceramic composition for magnetic head mounting device | |
| JPS59203771A (en) | Non-magnetic ceramic composition for magnetic head | |
| JPH0228538B2 (en) | ||
| JPH07108811B2 (en) | Non-magnetic ceramic material for magnetic head | |
| JPS6222947B2 (en) | ||
| JPS59203770A (en) | Non-magnetic ceramic composition for magnetic head | |
| JPH0513107B2 (en) | ||
| JPS6296363A (en) | Ceramic composition for magnetic head clasp |