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    Process for the production of magnetic head sliders
    1.
    发明授权
    Process for the production of magnetic head sliders 失效
    制造磁头滑块的工艺

    公开(公告)号：US5302560A

    公开(公告)日：1994-04-12

    申请号：US817976

    申请日：1992-01-08

    申请人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Mitsuhiko Furukawa ,  Takashi Kitahira ,  Michito Miyahara ,  Kiyohito Misumi ,  Masaharu Shiroyama

    发明人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Mitsuhiko Furukawa ,  Takashi Kitahira ,  Michito Miyahara ,  Kiyohito Misumi ,  Masaharu Shiroyama

    IPC分类号： C04B35/565 ,  C04B35/111 ,  C04B35/575 ,  C22C29/02 ,  G11B5/10 ,  G11B5/31 ,  G11B5/60 ,  G11B21/21 ,  C04B35/56

    CPC分类号： G11B5/10 ,  C04B35/111 ,  C04B35/575 ,  G11B5/3106

    摘要： A sintered material for recording/reading (particularly magnetic) head slider is produced by:preparing a powdery mixture which comprises 0.5 to 6.0% by weight of at least one component selected from the component group A consisting of the following elements and compounds thereof, a garnet type compound consisting essentially of erbium oxide and aluminum oxide in amounts of 2 to 12% by weight and 0 (exclusive) to 2 (inclusive) % by weight based on the total composition, respectively, and expressed by the formula Er.sub.3 (Al,Er).sub.2 (AlO.sub.4).sub.3 through (Er, Al).sub.3 Al.sub.2 (AlO.sub.4).sub.3, and the balance being silicon carbide powder:the elements for the component group A being Ti, V, Cr, Mn, Mg, Y, Zr, Nb, Mo, Ba, La, Ce, Gd, Hf, Ta, W, Th, and Cs; andsintering the resultant mass under the application of a high pressure.Further sintering aids of Be, BeO, B and B.sub.4 C may be present. For the garnet type compound, erbium oxide may be used, preferably in combination with alumina.

    摘要翻译： 用于记录/读取（特别是磁性）磁头滑块的烧结材料通过以下方法制备：制备粉末混合物，其包含0.5至6.0重量％的至少一种选自由以下元素组成的组分A和其化合物的组分， 基于总组合物，基本上由2〜12重量％的氧化铒和氧化铝组成的石榴石型化合物分别为0（排除）〜2（含）％，并由式Er 3（Al， Er）2（AlO4）3〜（Er，Al）3Al2（AlO4）3，余量为碳化硅粉末：组分A的元素为Ti，V，Cr，Mn，Mg，Y，Zr，Nb ，Mo，Ba，La，Ce，Gd，Hf，Ta，W，Th和Cs; 并在高压下进行烧结。 可能存在Be，BeO，B和B4C的其他烧结助剂。 对于石榴石型化合物，可以使用铒氧化物，优选与氧化铝组合。

    Magnetic head sliders, materials therefor, and the process for the production thereof
    2.
    发明授权
    Magnetic head sliders, materials therefor, and the process for the production thereof 失效
    磁头滑块，其材料及其生产方法

    公开(公告)号：US4859638A

    公开(公告)日：1989-08-22

    申请号：US155851

    申请日：1988-02-16

    申请人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Mitsuhiko Furukawa ,  Takashi Kitahira ,  Michito Miyahara ,  Kiyohito Misumi ,  Masaharu Shiroyama

    发明人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Mitsuhiko Furukawa ,  Takashi Kitahira ,  Michito Miyahara ,  Kiyohito Misumi ,  Masaharu Shiroyama

    IPC分类号： C04B35/565 ,  C04B35/111 ,  C04B35/575 ,  C22C29/02 ,  G11B5/10 ,  G11B5/31 ,  G11B5/60 ,  G11B21/21

    CPC分类号： G11B5/10 ,  C04B35/111 ,  C04B35/575 ,  G11B5/3106

    摘要： A sintered material for recording/reading (particularly magnetic) head slider is produced by:preparing a powdery mixture which comprises 0.5 to 6.0% by weight of at least one component selected from the component group A consisting of the following elements and compounds thereof, a garnet type compound consisting essentially of erbium oxide and aluminum oxide in amounts of 2 to 12% by weight and 0 (exclusive) to 2 (inclusive) % by weight based on the total composition, respectively, and expressed by the formula Er.sub.3 (Al,Er).sub.2 (AlO.sub.4).sub.3 through (Er,Al).sub.3 Al.sub.2 (AlO.sub.4).sub.3, and the balance being silicon carbide powder:the elements for the component group A being Ti, V, Cr, Mn, Mg, Y, Zr, Nb, Mo, Ba, La, Ce, Gd, Hf, Ta, W, Th, and Cs; andsintering the resultant mass under the application of a high pressure.Further sintering aids of Be, BeO, B and B.sub.4 C may be present. For the garnet type compound, erbium oxide may be used, preferably in combination with alumina.

    摘要翻译： 用于记录/读取（特别是磁性）磁头滑块的烧结材料通过以下方法制备：制备粉末混合物，其包含0.5至6.0重量％的至少一种选自由以下元素组成的组分A和其化合物的组分， 基于总组合物，基本上由2〜12重量％的氧化铒和氧化铝组成的石榴石型化合物分别为0（排除）〜2（含）％，并由式Er 3（Al， Er）2（AlO4）3〜（Er，Al）3Al2（AlO4）3，余量为碳化硅粉末：组分A的元素为Ti，V，Cr，Mn，Mg，Y，Zr，Nb ，Mo，Ba，La，Ce，Gd，Hf，Ta，W，Th和Cs; 并在高压下进行烧结。 可能存在Be，BeO，B和B4C的其他烧结助剂。 对于石榴石型化合物，可以使用铒氧化物，优选与氧化铝组合。

    Aluminum oxide substrate material for magnetic head and method for producing the same
    3.
    发明授权
    Aluminum oxide substrate material for magnetic head and method for producing the same 失效
    用于磁头的氧化铝衬底材料及其制造方法

    公开(公告)号：US4582812A

    公开(公告)日：1986-04-15

    申请号：US639216

    申请日：1984-08-09

    申请人： Mitsuhiko Furukawa ,  Michito Miyahara ,  Takashi Kitahira ,  Kiyohito Misumi ,  Masaharu Shiroyama ,  Toshiaki Wada

    发明人： Mitsuhiko Furukawa ,  Michito Miyahara ,  Takashi Kitahira ,  Kiyohito Misumi ,  Masaharu Shiroyama ,  Toshiaki Wada

    IPC分类号： C04B35/111 ,  G11B5/10 ,  G11B5/255 ,  G11B5/31 ,  C04B35/56 ,  C04B35/10 ,  G11B5/187

    CPC分类号： C04B35/111 ,  G11B5/10 ,  G11B5/255 ,  G11B5/3106

    摘要： Aluminum oxide substrate material for magnetic heads having improved toughness consisting essentially of: (1) 100 parts by weight, consisting of aluminum oxide and 30 to 50 parts by weight of (TiC+TiO.sub.2), and that provided TiO.sub.2 /(TiC+TiO.sub.2).times.100=5 to 15, (2) 0.5 to 5 parts by weight of addition of free cutting comprising at least one from the group of MgO, NiO, Cr.sub.2 O.sub.3 and ZrO.sub.2, and (3) 0.05 to 2 parts by weight of Y.sub.2 O.sub.3.The method of hot-forming aluminum oxide substrate material for magnetic head having improved sinterability consisting of (a) preparing a green compact by molding a raw material mixture which contains: (1) 100 parts by weight, consisting of aluminum oxide and 30 to 50 percent by weight of (TiC+TiO.sub.2), and that provided TiO.sub.2 /(TiC+TiO.sub.2).times.100=5 to 15, (2) 0.5 to 5 parts by weight of machinability agents comprising at least one from the group of MgO, NiO, Cr.sub.2 O.sub.3 and ZrO.sub.2, and (3) 0.05 to 2 parts by weight of Y.sub.2 O.sub.3 (b) optionally presintering said green compacts; and effecting sintering.

    摘要翻译： 具有改进的韧性的用于磁头的氧化铝基材材料基本上由以下组成：（1）100重量份，由氧化铝和30至50重量份的（TiC + TiO 2）组成，并且提供TiO 2 /（TiC + TiO 2） x100 = 5〜15，（2）0.5〜5重量份的包含MgO，NiO，Cr 2 O 3和ZrO 2中的至少一种的自由切割，和（3）0.05〜2重量份的Y 2 O 3。 一种热成型氧化铝基材的方法，其具有改善的烧结性，其包括（a）通过模制原料混合物制备生坯，所述原料混合物包含：（1）100重量份，由氧化铝和30至50 （TiC + TiO 2）重量百分比，TiO 2 /（TiC + TiO 2）x 100 = 5〜15，（2）0.5〜5重量份的可加工性试剂，其包含MgO，NiO， Cr2O3和ZrO2，以及（3）0.05-2重量份的Y2O3（b）任选地预烧结所述生坯; 并进行烧结。

    Alumina base substrate of recording head and process for the production thereof
    10.
    发明授权
    Alumina base substrate of recording head and process for the production thereof 失效
    记录头的氧化铝基底及其制造方法

    公开(公告)号：US4598052A

    公开(公告)日：1986-07-01

    申请号：US728223

    申请日：1985-04-29

    申请人： Toshiaki Wada ,  Mitsuhiko Furukawa ,  Mitsuyoshi Nagano ,  Michito Miyahara ,  Shigeki Mori

    发明人： Toshiaki Wada ,  Mitsuhiko Furukawa ,  Mitsuyoshi Nagano ,  Michito Miyahara ,  Shigeki Mori

    IPC分类号： C04B35/111 ,  G11B5/31 ,  H01F10/26 ,  H01F10/28 ,  C04B35/10 ,  C04B35/46 ,  C04B35/56

    CPC分类号： C04B35/111

    摘要： An alumina base substrate material for recording heads, which comprises a densely sintered body consisting essentially of:per 100 parts by weight of a base component of 30 to 40% by weight of a titanium compound having TiO.sub.2 to (TiC+TiO.sub.2) percentage of 5 to 15% by weight and the balance being Al.sub.2 O.sub.3,components A, B and C, provided that the A to B ratio is within a hatched KLMN area in FIG. 1, in the following given parts by weight, andoxidic impurities in amounts of no higher than 0.2% by weight based on the total composition,said sintered body having an average crystal grain size of no higher than 1.3 microns, a porosity per area of no higher than 0.5%, a bending strength of at least 70 kg/cm.sup.2 and a hardness H.sub.R A of at least 93.0: whereincomponent A is at least one of spinels expressed by RO-Al.sub.2 O.sub.3, where R is at least one of Mg, Mn, Ni and Co, in an amount of 2.0 to 17.5 parts by weight,component B is 0.2 to 2.0 parts by weight of ZrO.sub.2, andComponent C is 0.05 to 2.0 parts by weight of Y.sub.2 O.sub.3.

    摘要翻译： 用于记录头的氧化铝基底材料，其包含致密烧结体，其基本上由以下组成：每100重量份的基础组分为30至40重量％的具有TiO 2至（TiC + TiO 2）百分比为5的钛化合物 至15重量％，余量为Al 2 O 3，成分A，B和C，条件是A比B在图1中的阴影KLMN区域内。 1，以下给出的重量份数和相对于总组成不超过0.2重量％的氧化物杂质，所述烧结体的平均晶粒尺寸不大于1.3微米，每个面积的孔隙率 不大于0.5％，弯曲强度至少为70kg / cm2，硬度HRA为93.0以上：其中组分A为由RO-Al2O3表示的至少一种尖晶石，其中R为Mg，Mn中的至少一种 ，Ni和Co的量为2.0〜17.5重量份，B成分为ZrO 2 0.2〜2.0重量份，C 2为0.05〜2.0重量份。