JPH0335257B2 - - Google Patents
Info
- Publication number
- JPH0335257B2 JPH0335257B2 JP57020011A JP2001182A JPH0335257B2 JP H0335257 B2 JPH0335257 B2 JP H0335257B2 JP 57020011 A JP57020011 A JP 57020011A JP 2001182 A JP2001182 A JP 2001182A JP H0335257 B2 JPH0335257 B2 JP H0335257B2
- Authority
- JP
- Japan
- Prior art keywords
- porcelain
- weight
- magnetic head
- composition
- mechanical strength
- 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
- 229910052573 porcelain Inorganic materials 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims description 8
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 4
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 3
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Inorganic materials [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims 2
- 239000011148 porous material Substances 0.000 description 11
- 238000010304 firing Methods 0.000 description 7
- 229910000859 α-Fe Inorganic materials 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 229910010413 TiO 2 Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910019440 Mg(OH) Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000003891 oxalate salts Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/105—Mounting of head within housing or assembling of head and housing
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Magnetic Heads (AREA)
Description
本発明は磁器の熱膨張係数が80×120〜10-7℃
-1を有し、また機械的強度、硬度及び耐熱性さら
には、機械加工時のチツピング性が著しく良好な
磁気ヘツド止め具用磁器組成物に関するものであ
る。
従来より磁気ヘツド止め具用磁器としてアルミ
ナ、フオルステライト、ステアタイト磁器等が利
用されていた。しかしながら、これらの最大の欠
点は同一成分系統において熱膨張係数を変化さす
事が非常に困難なものであつた。このためフエラ
イト素子さらにはガラス質と組合せて使用する場
合、これらの熱膨張係数が種々異なつていたの
で、その選択が著しく困難であつた。また、用途
として磁気ヘツド及びこのヘツド止め具用磁器を
ともに磁気テープに接触させ、磁気テープを磁化
させる方法が主であり、この場合時磁気ヘツド及
び止め具用磁器は同程度の磨耗性がなく、フエラ
イトと磁気テープ間にギヤツプが生じ、そのため
磁気テープの磁化に悪影響を与える。さらに、こ
の止め具用磁器に60μm以上のポア径を有するポ
アが存在すると、磁気テープ表面に損傷を与え
る。
これらの解決には、材料面より目的の熱膨張係
数を自由に変化させる事が可能で、且つ熱衝撃性
が強く、また機械的強度、ビツカース硬度ご高
く、磁気ヘツドと同程度の磨耗性を有し、ポアの
小ない磁気ヘツド止め具用磁器材料を開発する事
である。
特に、最近ホツトプレス法やHIP（Hot
Isostatic Pressing）法により作製した多結晶フ
エライトまたは単結晶製造法により作製した単結
晶フエライトを用いた電子計算機用、ビデオテー
プレコーダ用磁気ヘツド等の止め具用磁器とし
て、機械的強度、熱スポーリング、硬度、セラミ
ツクポア分布等が良好で、さらに熱膨張係数が60
〜120×10-7℃-1の範囲にある素体が強く要望さ
れている。
現在、これら欠点のいくつかを解決した磁気ヘ
ツド止め具用磁器に関する公知文献として、特公
昭51−15528号公報、特公昭51−42606号公報、特
公昭52−30162号公報、特公昭52−29766号公報が
ある。しかしながら、特公昭51−15528号公報〜
特公昭52−29766号公報によるものはポア分布が
改善されていないので、ポア径60μm以上のポア
が多数存在し、磁気テープ表面に損傷を与える。
また、焼成の際に炉内雰囲気が酸化雰囲気より中
性あるいは還元雰囲気へ変化すると、TiO2が還
元され磁器内部に色むらが生じる。他に、これら
欠点を解決したものもあるが、機械加工時にチツ
ピングが発生しやすく、精密加工が困難という欠
点を有する。
本発明は係る従来の欠点を除去するとともに、
焼成雰囲気に著しく安定しており、また機械精密
加工時のチツピング発生数が非常に少なく、さら
には急熱急冷の熱衝撃性、機械的強度、硬度、ポ
ア分布等、磁気ヘツド止め具用磁器として必要な
条件を全て備えている新しい止め具用磁器素体の
組成物を提供するものである。
すなわち、本発明に係る磁気ヘツド止め具用磁
器組成物は、TiO2：20〜75重量％、MgO：20〜
78重量％、ZnO：0.01〜10重量％、BaO、SrO、
CaO、SiO2、Nb2O5、Al2O3、SnO2、ZrO2、
Cr2O3、Fe2O3の１種または２種以上が合計20重
量％以下の組成範囲より成り、合計が100重量％
になる組成物を焼結してなる事を特徴とする。
上記範囲内の成分割合を変化させる事により、
熱膨張係数値を80〜120×10-7℃-1の範囲で自由
に選択する事ができ、これら止め具用磁器素体は
機械加工時のチツピング発生が非常に少なく、焼
成雰囲気変化による色むらがなく、機械的強度が
高く、ポア分布が良好であり、フエライトと同程
度の磨耗性を有し、さらには熱衝撃特性が良く、
フエライト素体−ガラス−止め具用磁器と組合せ
た場合、亀裂が全く起らず安全で、且つ再現性の
高いものである。
尚、上記成分において、MgOが20％未満では
耐熱特性が悪く、機械的強度も低下する。また、
チツピング発生率が大きくなる。さらに、MgO
が78重量％を超えると焼結性が悪く、機械的強度
も悪化する。また、チツピング発生率が大きくな
る。そして、TiO2が75重量％を超えると結晶粒
子径が粗く機械的強度も低下し、さらに焼成雰囲
気の微妙な変化により色むらを生じる。また、
TiO2が20重量％未満では焼結性が悪い。さらに、
ZnOが10重量％を超えると耐熱特性が悪く、且つ
0.01重量％未満では焼成雰囲気の微妙な変化によ
り磁器内部に色むらが生じる。また、BaO、
CaO、SrO、SiO2、Nb2O5、Al2O3、SnO2、
ZrO2、Cr2O3、Fe2O3の１種または２種以上が合
計20重量％を超えると、チツピング発生率が大き
くなる。
以上記述したように、磁気ヘツド止め具用磁器
としてはフエライト素子に接着用ガラスを媒体と
して磁器（止め具）に埋め込むために、熱膨張係
数、熱衝撃性、機械的強度、ポア分布等との関連
性が非常に重要であるが、これら条件を満足する
材料として本発明範囲内の組成物で作製した磁器
素体は、熱膨張係数を自由に制御する事ができる
ものである。
以下、本発明を実施例を挙げ具体的に説明す
る。
試料の調整工程としては工業用原料（純度98％
以上）であるTiO、MgO、ZnO、BaCO3、
CaCO3、SrCO3、SiO2、Nb2O5、Al2O3、SnO2、
ZrO2、Cr2O3、Fe2O3を用い、混合は不純物の混
入を防止するためウレタン内張ポツトミルを用い
湿式混合した。試料作成の順序としては下記第１
表に示す組成比になるよう原料を調合し、仮焼成
は1000〜1200℃の間で行つた。また、成型は機械
プレスを用い、50×50×10mmの試料を成型した。
本焼成は電気炉を用い、温度1300〜1400℃の間で
焼成を行つた。得られた素子は下記第２表のよう
な各諸特性を示した。
The present invention has a thermal expansion coefficient of porcelain of 80 x 120 to 10 -7 ℃.
The present invention relates to a porcelain composition for a magnetic head stopper, which has a hardness of -1 and has extremely good mechanical strength, hardness, heat resistance, and chipping property during machining. Conventionally, alumina, forsterite, steatite porcelain, etc. have been used as porcelain for magnetic head fasteners. However, the biggest drawback of these is that it is very difficult to change the coefficient of thermal expansion in the same component system. For this reason, when used in combination with a ferrite element or even a glass element, it is extremely difficult to select one since these elements have different coefficients of thermal expansion. In addition, the main application is to bring both the magnetic head and the porcelain head stopper into contact with the magnetic tape to magnetize the magnetic tape, and in this case, the magnetic head and the porcelain stopper do not have the same degree of abrasion. , a gap occurs between the ferrite and the magnetic tape, which adversely affects the magnetization of the magnetic tape. Furthermore, if pores with a pore diameter of 60 μm or more are present in this porcelain fastener, the surface of the magnetic tape will be damaged. To solve these problems, it is possible to freely change the desired thermal expansion coefficient from the material side, and it has strong thermal shock resistance, as well as high mechanical strength and Vickers hardness, and has the same level of abrasion resistance as a magnetic head. The objective is to develop a porcelain material for magnetic head fasteners with small pores. In particular, recently hot press method and HIP (Hot
Polycrystalline ferrite produced by the isostatic pressing method or single crystal ferrite produced by the single-crystal production method is used as porcelain for fasteners such as magnetic heads for electronic computers and video tape recorders, with excellent mechanical strength, thermal spalling, Good hardness, ceramic pore distribution, etc., and thermal expansion coefficient of 60
There is a strong demand for elements in the range of ~120×10 -7 °C -1 . Currently, known documents regarding porcelain for magnetic head fasteners that solve some of these drawbacks include: Japanese Patent Publication No. 51-15528, Japanese Patent Publication No. 42606, Japanese Patent Publication No. 52-30162, Japanese Patent Publication No. 52-29766. There is a publication. However, Special Publication No. 51-15528~
In the method disclosed in Japanese Patent Publication No. 52-29766, the pore distribution is not improved, so there are many pores with a pore diameter of 60 μm or more, which causes damage to the magnetic tape surface.
Furthermore, when the atmosphere in the furnace changes from an oxidizing atmosphere to a neutral or reducing atmosphere during firing, TiO 2 is reduced and color unevenness occurs inside the porcelain. Although there are other methods that have solved these drawbacks, they have the disadvantage that chipping tends to occur during machining and precision machining is difficult. The present invention eliminates such conventional drawbacks, and
It is extremely stable in the firing atmosphere, and the number of chips that occur during precision mechanical processing is extremely low.It also has thermal shock resistance during rapid heating and cooling, mechanical strength, hardness, pore distribution, etc., making it suitable for use as a porcelain for magnetic head stoppers. The object of the present invention is to provide a new composition for a porcelain body for fasteners that satisfies all the necessary conditions. That is, the ceramic composition for a magnetic head stopper according to the present invention contains TiO2 : 20-75% by weight, MgO: 20-75% by weight.
78% by weight, ZnO: 0.01-10% by weight, BaO, SrO,
CaO, SiO2 , Nb2O5 , Al2O3 , SnO2 , ZrO2 ,
Composition range of one or more of Cr 2 O 3 and Fe 2 O 3 in a total of 20% by weight or less, and the total is 100% by weight
It is characterized by being made by sintering a composition of By changing the component ratio within the above range,
The coefficient of thermal expansion can be freely selected within the range of 80 to 120 × 10 -7 °C -1 , and these porcelain bodies for fasteners have very little chipping during machining, and their color changes due to changes in the firing atmosphere. It has no unevenness, high mechanical strength, good pore distribution, abrasion resistance comparable to ferrite, and good thermal shock properties.
When combined with ferrite body, glass, and porcelain for fasteners, it is safe and highly reproducible without any cracking. In addition, in the above components, if MgO is less than 20%, heat resistance properties are poor and mechanical strength is also reduced. Also,
Chipping occurrence rate increases. Furthermore, MgO
If it exceeds 78% by weight, sinterability will be poor and mechanical strength will also deteriorate. Moreover, the chipping occurrence rate increases. When TiO 2 exceeds 75% by weight, the crystal grain size becomes coarse and the mechanical strength decreases, and subtle changes in the firing atmosphere cause color unevenness. Also,
If TiO 2 is less than 20% by weight, sinterability is poor. moreover,
When ZnO exceeds 10% by weight, heat resistance properties are poor and
If it is less than 0.01% by weight, color unevenness will occur inside the porcelain due to subtle changes in the firing atmosphere. Also, BaO,
CaO, SrO , SiO2 , Nb2O5 , Al2O3 , SnO2 ,
If the total amount of one or more of ZrO 2 , Cr 2 O 3 , and Fe 2 O 3 exceeds 20% by weight, the incidence of chipping increases. As described above, porcelain for magnetic head fasteners has various characteristics such as thermal expansion coefficient, thermal shock resistance, mechanical strength, pore distribution, etc. in order to embed the ferrite element into the porcelain (fastener) using adhesive glass as a medium. Although the relationship is very important, a porcelain body made of a composition within the scope of the present invention as a material that satisfies these conditions can have a thermal expansion coefficient that can be freely controlled. Hereinafter, the present invention will be specifically explained with reference to Examples. The sample preparation process involves using industrial raw materials (98% purity).
TiO, MgO, ZnO, BaCO 3 ,
CaCO3 , SrCO3 , SiO2 , Nb2O5 , Al2O3 , SnO2 ,
ZrO 2 , Cr 2 O 3 , and Fe 2 O 3 were used, and wet mixing was performed using a urethane-lined pot mill to prevent contamination of impurities. The order of sample preparation is as follows:
Raw materials were prepared to have the composition ratio shown in the table, and temporary firing was performed at a temperature of 1000 to 1200°C. In addition, a mechanical press was used for molding, and a sample of 50×50×10 mm was molded.
The main firing was carried out using an electric furnace at a temperature of 1300 to 1400°C. The obtained device exhibited various characteristics as shown in Table 2 below.
【表】【table】
【表】【table】
【表】
尚、本実施例ではマグネシウム成分として
MgOを用いたが、MgCO3、MgCl2、Mg（OH）2、
また亜鉛成分としてZnOを用いたが、ZnCO3等、
本発明成分において炭酸塩、蓚酸塩等の原料を用
いても良好な特性が得られる。
第１表、第２表より明らかなように、本発明範
囲内の実施例はNo.１〜15迄であり、No.16〜23は範
囲外の比較例である。また、No.24はBaO−TiO系
磁気ヘツド止め具用磁器（特公昭52−29766号の
特許請求の範囲の組成を有する）の従来例であ
る。
本発明範囲内の試料は、機械加工時のチツピン
グ発生率が著しく低く、また機械的強度、熱衝撃
性、ポア分布、色むら等、諸特性において優秀な
特性を示している。
また、範囲外の比較例は、機械加工時のチツピ
ング発生率、機械的強度、色むら等、悪いもので
あつた。本実施例において、熱衝撃特性の測定方
法としては、380℃の半田槽中へ磁器素子（試料）
を10秒間浸漬し、その後30cmの高さより３mm厚の
Al板上へ落下させた後の割れ率を調べたもので
ある。個数は100個テストを行つた。
チツピング発生数の測定方法としては、10×10
×100mmの試料を長さ方向（100mm）に向つて、ダ
イヤモンド高速回転切断機を用いて切断し、その
切断面のチツピング数をマイクロメータ付光学顕
微鏡によりカウントした。切断機の使用条件（ダ
イアモンドカツター回転数、試料送り速度）は一
定とする。個数は100個テストとし、チツピング
数は１個当りの平均値とする。
以上のように、本発明の範囲内の組成物は、磁
気ヘツド用止め具磁器材料として非常に優れた性
能を備えており、工業的量産化においても著しく
安定であり、産業的価値の大なるものである。[Table] In this example, as the magnesium component,
Although MgO was used, MgCO 3 , MgCl 2 , Mg(OH) 2 ,
In addition, although ZnO was used as the zinc component, ZnCO 3 etc.
Good properties can be obtained even when raw materials such as carbonates and oxalates are used in the components of the present invention. As is clear from Tables 1 and 2, Examples Nos. 1 to 15 are within the scope of the present invention, and Nos. 16 to 23 are comparative examples outside the scope. Further, No. 24 is a conventional example of BaO-TiO based porcelain for magnetic head stoppers (having the composition as claimed in Japanese Patent Publication No. 52-29766). Samples within the scope of the present invention have a significantly low chipping rate during machining, and exhibit excellent properties such as mechanical strength, thermal shock resistance, pore distribution, and color unevenness. Comparative examples outside the range were poor in chipping incidence during machining, mechanical strength, color unevenness, etc. In this example, the method for measuring thermal shock characteristics was to place a ceramic element (sample) into a solder bath at 380°C.
Soak for 10 seconds, then soak in a 3mm thick layer from a height of 30cm.
The cracking rate after being dropped onto an Al plate was investigated. 100 pieces were tested. The method for measuring the number of chipping occurrences is 10×10
A sample of ×100 mm was cut in the length direction (100 mm) using a diamond high-speed rotary cutting machine, and the number of chips on the cut surface was counted using an optical microscope equipped with a micrometer. The operating conditions of the cutting machine (diamond cutter rotation speed, sample feeding speed) are constant. The number of chips is 100 pieces tested, and the number of chips is the average value per piece. As described above, the composition within the scope of the present invention has extremely excellent performance as a magnetic head stopper ceramic material, is extremely stable even in industrial mass production, and has great industrial value. It is something.
Claims (1)
％、ZnO：0.01〜10重量％、BaO、CaO、SrO、
SiO2、Nb2O5、Al2O3、SnO2、ZrO2、Cr2O3、
Fe2O3の１種または２種以上が合計20重量％以下
の成分範囲より成り、合計が100重量％になる組
成物を焼結してなる事を特徴とする磁気ヘツド止
め具用磁器組成物。1 TiO2 : 20-75% by weight, MgO: 20-78% by weight, ZnO: 0.01-10% by weight, BaO, CaO, SrO,
SiO2 , Nb2O5 , Al2O3 , SnO2 , ZrO2 , Cr2O3 ,
A porcelain composition for a magnetic head stopper, characterized in that it is made by sintering a composition comprising one or more Fe 2 O 3 in a total amount of 20% by weight or less, and the total amount is 100% by weight. thing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57020011A JPS58139322A (en) | 1982-02-10 | 1982-02-10 | Porcelain composition for magnetic head stopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57020011A JPS58139322A (en) | 1982-02-10 | 1982-02-10 | Porcelain composition for magnetic head stopper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58139322A JPS58139322A (en) | 1983-08-18 |
| JPH0335257B2 true JPH0335257B2 (en) | 1991-05-27 |
Family
ID=12015166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57020011A Granted JPS58139322A (en) | 1982-02-10 | 1982-02-10 | Porcelain composition for magnetic head stopper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58139322A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60103076A (en) * | 1983-11-02 | 1985-06-07 | 住友特殊金属株式会社 | Ceramic composition for magnetic head |
| JPS60161372A (en) * | 1984-01-28 | 1985-08-23 | 東陶機器株式会社 | Non-magnetic ceramic composition for magnetic head |
| JPS60150614U (en) * | 1984-03-16 | 1985-10-07 | 東陶機器株式会社 | Magnetic head for floppy diskette |
| JPS6113314U (en) * | 1984-06-21 | 1986-01-25 | 東陶機器株式会社 | VTR audio head |
| EP0191447B1 (en) * | 1985-02-15 | 1992-05-13 | Matsushita Electric Industrial Co., Ltd. | Magnetic head |
| DE102007018610A1 (en) * | 2007-04-18 | 2008-10-23 | Ceramtec Ag Innovative Ceramic Engineering | Ceramic material having a composition that is tuned to a given by a metallic material thermal expansion coefficient |
-
1982
- 1982-02-10 JP JP57020011A patent/JPS58139322A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58139322A (en) | 1983-08-18 |
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