公开(公告)号：US06429160B1

公开(公告)日：2002-08-06

申请号：US09577720

申请日：2000-05-23

申请人： Kousuke Nakajima ,  Junko Ishioka ,  Katsuhiko Yamaguchi ,  Naoyuki Goto ,  Takayuki Kishi

发明人： Kousuke Nakajima ,  Junko Ishioka ,  Katsuhiko Yamaguchi ,  Naoyuki Goto ,  Takayuki Kishi

IPC分类号： C03C1004

CPC分类号： G11B5/7315 ,  C03C10/0045

摘要： A high rigidity glass-ceramic substrate is provided which contains, as a predominant crystal phase or phases, at least one crystal phase selected from the group consisting of enstatite (MgSiO3), enstatite solid solution (MgSiO3 solid solution), magnesium titanate (MgTi2O) and magnesium titanate solid solution (MgTi2O5 solid solution), has fine crystal grains (preferably globular crystal grains) of precipitated crystal phases, has excellent melting property of a base glass, high resistivity to devitrification, easiness in polishing, excellent smoothness in the surface after polishing and has high Young's modulus capable of coping with a high speed rotation.

摘要翻译： 提供了一种高刚性玻璃陶瓷基片，其包含作为主要结晶相或相的至少一种选自顽辉石（MgSiO 3），顽辉石固溶体（MgSiO 3固溶体），钛酸镁（MgTi 2 O） 和钛酸镁固溶体（MgTi 2 O 5固溶体）具有析出的结晶相的微细晶粒（优选球状晶粒），具有优异的基底玻璃熔融性，高失透性，抛光性，表面光滑度优异 抛光，并具有高的杨氏模量，能够应付高速旋转。

公开(公告)号：US06503857B2

公开(公告)日：2003-01-07

申请号：US09947960

申请日：2001-09-06

申请人： Kousuke Nakajima ,  Junko Ishioka ,  Katsuhiko Yamaguchi ,  Naoyuki Goto ,  Takayuki Kishi

发明人： Kousuke Nakajima ,  Junko Ishioka ,  Katsuhiko Yamaguchi ,  Naoyuki Goto ,  Takayuki Kishi

IPC分类号： C03C1002

CPC分类号： G11B5/7315 ,  C03C10/0045

摘要： A high rigidity glass-ceramic substrate is provided which contains, as a predominant crystal phase or phases, at least one crystal phase selected from the group consisting of enstatite (MgSiO3), enstatite solid solution (MgSiO3 solid solution), magnesium titanate (MgTi2O5) and magnesium titanate solid solution (MgTi2O5 solid solution), has fine crystal grains (preferably globular crystal grains) of precipitated crystal phases, has excellent melting property of a base glass, high resistivity to devitrification, easiness in polishing, excellent smoothness in the surface after polishing and has high Young's modulus capable of coping with a high speed rotation.

摘要翻译： 提供了一种高刚性玻璃陶瓷基片，其包含作为主要晶相或相的至少一种选自顽辉石（MgSiO 3），顽辉石固溶体（MgSiO 3固溶体），钛酸镁（MgTi 2 O 5） 和钛酸镁固溶体（MgTi 2 O 5固溶体）具有析出的结晶相的微细晶粒（优选球状晶粒），具有优异的基底玻璃熔融性，高失透性，抛光性，表面光滑度优异 抛光，并具有高的杨氏模量，能够应付高速旋转。

公开(公告)号：US06819526B2

公开(公告)日：2004-11-16

申请号：US10069737

申请日：2002-02-26

申请人： Mariko Kataoka ,  Naoyuki Goto ,  Kousuke Nakajima ,  Junko Ishioka ,  Katsuhiko Yamaguchi ,  Toshitaka Yagi

发明人： Mariko Kataoka ,  Naoyuki Goto ,  Kousuke Nakajima ,  Junko Ishioka ,  Katsuhiko Yamaguchi ,  Toshitaka Yagi

IPC分类号： G11B1702

CPC分类号： G11B5/7315 ,  C03C10/0027 ,  C03C10/0045 ,  G11B5/012 ,  G11B5/82 ,  G11B17/00 ,  G11B23/00

摘要： An information storage disk holding member for holding an information storage disk in position in an information storage disk drive device, the holding member being made of glass-ceramics in which a crystal phase is dispersed in a glass matrix. The holding member has specific rigidity (Young's modulus/specific gravity) of not greater than 37 GPa, specific gravity of not greater than 3.0, coefficient of thermal expansion within a range from −50° C. to +70° C. which is within a range from +35×10−7/° C. to +130×10−7/° C., Young's modulus within a range from 95 GPa to 130 GPa, specific gravity within a range from 2.40 to 2.60 and bending strength within a range from 400 MPa to 800 MPa. There is provided an information storage disk holding member which is capable of coping with a high speed rotation of a disk in conformity with tendencies toward high speed transmission of information, increasing mechanical strength for adaptation to mobile uses, having a thermal expansion property matching that of other drive component parts and eliminating defects caused by solving out of alkali. There is also provided an information storage disk drive device using this holding member.

摘要翻译： 一种信息存储盘保持构件，用于将信息存储盘保持在信息存储盘驱动装置中的适当位置，所述保持构件由将晶相分散在玻璃基体中的玻璃陶瓷制成。 保持构件具有不大于37GPa，比重不大于3.0的比刚度（杨氏模量/比重），在-50℃至+ 70℃的范围内的热膨胀系数 在+ 35×10 -7 /℃至+ 130×10 -7 /℃的范围内，杨氏模量在95GPa至130GPa的范围内，比重在2.40至2.60范围内，弯曲强度在 范围从400MPa到800MPa。提供了一种信息存储盘保持构件，其能够适应于高速传输信息的趋势，提高了盘的高速旋转，增加了适应移动用途的机械强度 具有与其他驱动部件的热膨胀特性相匹配的特征，并且消除由碱析出而引起的缺陷。 还提供了使用该保持构件的信息存储盘驱动装置。

公开(公告)号：US6034011A

公开(公告)日：2000-03-07

申请号：US266559

申请日：1999-03-11

申请人： Katsuhiko Yamaguchi ,  Naoyuki Goto

发明人： Katsuhiko Yamaguchi ,  Naoyuki Goto

IPC分类号： C03B32/00 ,  C03B32/02 ,  C03C3/097 ,  C03C10/00 ,  C03C10/04 ,  C03C10/14 ,  C03C19/00 ,  C03C23/00 ,  G11B5/31 ,  G11B25/04

CPC分类号： C03C23/007 ,  C03C10/0009 ,  C03C19/00 ,  C03C2204/08

摘要： A glass-ceramic substrate for a magnetic head has as its predominant crystal phase a mixed crystal of lithium disilicate (Li.sub.2 O.2SiO.sub.2) and either or both of .alpha.-quartz (.alpha.-SiO.sub.2) and .alpha.-cristobalite (.alpha.-SiO.sub.2), the .alpha.-quartz has a globular grain structure each globular crystral grain being made of aggregated particles and having a grain diameter within a range from 0.1 .mu.m to 3.0 .mu.m, the .alpha.-cristobalite has a globular grain structure each globular grain having a grain diamter within a range from 0.1 .mu.m to 1.0 .mu.m, and surface roughness (Ra) of the glass-ceramic substrate after polishing is within a range from 5 .ANG. to 50 .ANG..

摘要翻译： 用于磁头的玻璃陶瓷衬底具有作为其主要结晶相的是二硅酸锂（Li 2 O 2·SiO 2）和α-石英（α-SiO 2）和α-方英石（α-SiO 2）中的任一种或两者的混合晶体， α-石英具有球状晶粒结构，每个球状低温晶粒由凝集颗粒制成，粒径在0.1μm至3.0μm的范围内，α-方晶石具有球状晶粒结构，每个球状晶粒具有晶粒直径 在0.1μm〜1.0μm的范围内，研磨后的玻璃陶瓷基板的表面粗糙度（Ra）在5〜50的范围内。

公开(公告)号：US5567217A

公开(公告)日：1996-10-22

申请号：US442381

申请日：1995-05-16

申请人： Naoyuki Goto ,  Katsuhiko Yamaguchi

发明人： Naoyuki Goto ,  Katsuhiko Yamaguchi

IPC分类号： C03C10/00 ,  C03C10/14 ,  C03C23/00 ,  G11B5/73 ,  G11B5/84 ,  C03B32/00

CPC分类号： G11B5/7315 ,  C03C10/0009 ,  C03C23/007 ,  G11B5/73 ,  G11B5/8404

摘要： A magnetic disk substrate is made of a glass-ceramic having crystal phases of lithium disilicate (Li.sub.2 O.2SiO.sub.2) and alpha-quartz (SiO.sub.2). The crystal phase of alpha-quartz is formed of grown crystal grains each having a globular grain structure made of aggregated particles. Each globular grain has a size within a range from 0.3 .mu.m to 3 .mu.m. Surface roughness (Ra) of a polished surface of the magnetic disk substrate is within a range from 15 .ANG. to 50 .ANG. which is an optimum range of surface roughness for the magnetic disk.

摘要翻译： 磁盘基板由具有二硅酸锂（Li 2 O 2·SiO 2）和α-石英（SiO 2）的晶相的玻璃陶瓷制成。 α-石英的晶相由具有由凝集颗粒形成的球状晶粒结构的生长晶粒形成。 每个球状颗粒的尺寸在0.3μm至3μm的范围内。 磁盘基板的抛光表面的表面粗糙度（Ra）在15〜50的范围内，这是磁盘表面粗糙度的最佳范围。

公开(公告)号：US5391522A

公开(公告)日：1995-02-21

申请号：US248757

申请日：1994-05-25

申请人： Naoyuki Goto ,  Katsuhiko Yamaguchi

发明人： Naoyuki Goto ,  Katsuhiko Yamaguchi

IPC分类号： C03C10/00 ,  C03C23/00 ,  G11B5/73 ,  G11B5/84 ,  C03C10/12 ,  C03C10/14

CPC分类号： C03C10/00 ,  C03C10/0009 ,  C03C23/007 ,  G11B5/73 ,  G11B5/7315 ,  G11B5/8404

摘要： A glass-ceramic for a magnetic disk substrate in which the grain size can be controlled and the surface roughness after polishing is within the range from 15 .ANG. to 50 .ANG. is provided by heat treating a base glass including in weight percent:______________________________________ SiO.sub.2 65-83% Li.sub.2 O 8-13% K.sub.2 O 0-7% Mgo + ZnO + PbO 0.5-5.5% in which MgO 0.5-5.5% ZnO 0-5% PbO 0-5% P.sub.2 O.sub.5 1-4% Al.sub.2 O.sub.3 0-7% As.sub.2 O.sub.3 + Sb.sub.2 O.sub.3 0-2% ______________________________________ The glass-ceramic contains lithium disilicate (Li.sub.2 O. 2SiO.sub.2) and alpha-quartz (SiO.sub.2) as the main crystal phases.

摘要翻译： 通过热处理包括重量百分比的基础玻璃，提供了可控制晶粒尺寸和抛光后的表面粗糙度在15至50范围内的磁盘基底的玻璃陶瓷，该基础玻璃包括：-SiO 2 65- 83％-Li2O 8-13％-K2O 0-7％-Mgo + ZnO + PbO 0.5-5.5％ - 其中-Mg 0.5-5.5％-ZnO 0-5％-PbO 0-5％-P2O5 1-4 ％-Al2O3 0-7％-As2O3 + Sb2O3 0-2％ - 玻璃陶瓷含有二硅酸锂（Li2O·2SiO2）和α-石英（SiO2）为主要晶相。

公开(公告)号：US5332700A

公开(公告)日：1994-07-26

申请号：US67227

申请日：1993-05-26

申请人： Katsuhiko Yamaguchi ,  Futoshi Ishizaki ,  Naoyuki Goto ,  Hisao Yatsuda ,  Goro Enomoto ,  Hideo Yasui

发明人： Katsuhiko Yamaguchi ,  Futoshi Ishizaki ,  Naoyuki Goto ,  Hisao Yatsuda ,  Goro Enomoto ,  Hideo Yasui

IPC分类号： C03C3/112 ,  C03C3/097 ,  C03C4/00

CPC分类号： C03C3/112 ,  Y10S501/903

摘要： An optical glass which is a SiO.sub.2 -Nb.sub.2 O.sub.5 -R'.sub.2 O (where R' is an alkali metal element)-F system of a specific composition range exhibits optical constants of a refractive index (Nd) of about 1.52-1.67 and an Abbe number (.upsilon. d) of about 32-50, is free of PbO and has an improved light transmissivity.

摘要翻译： 作为特定组成范围的SiO 2-Nb 2 O 5 -R'2O（其中R'是碱金属元素）-F系统的光学玻璃，其折射率（Nd）约为1.52-1.67的光学常数和阿贝数 （上限）为约32-50，不含PbO并且具有改善的透光率。

公开(公告)号：US06201663B1

公开(公告)日：2001-03-13

申请号：US09265039

申请日：1999-03-09

申请人： Katsuhiko Yamaguchi ,  Naoyuki Goto

发明人： Katsuhiko Yamaguchi ,  Naoyuki Goto

IPC分类号： C11B560

CPC分类号： C03C19/00 ,  C03C10/0009 ,  C03C23/007

摘要： A magnetic head has a slider made of a glass-ceramic substrate which has, as its predominant crystal phase, a mixed crystal of lithium disilicate (Li2O.2SiO2) and either or both of &agr;-quartz (&agr;-SiO2) and &agr;-cristobalite (&agr;-SiO2), the &agr;-quartz has a globular grain structure each globular crystal grain being made of aggregated particles and having a grain diameter within a range from 0.1 &mgr;m to 3.0 &mgr;m, the &agr;-cristobalite has a globular grain structure each globular grain having a grain diamter within a range from 0.1 &mgr;m to 1.0 &mgr;m, and surface roughness (Ra) of the glass-ceramic substrate after polishing is within a range from 5 Å to 50 Å.

摘要翻译： 磁头具有由玻璃 - 陶瓷衬底制成的滑块，其具有作为其主要结晶相的二硅酸锂（Li 2 O.2SiO 2 ）的混合晶体， 和α-石英（α-SiO 2 ）和α-方英石（α-SiO 2 ）中的任一种或两者，α-石英具有球状晶粒结构，每个球状 晶粒由凝集粒子制成，粒径在0.1μm〜3.0μm的范围内，所述α-方英石具有球状晶粒结构，每个球状晶粒的晶粒直径在0.1μm〜1.0μm的范围内，表面 研磨后的玻璃陶瓷基板的粗糙度（Ra）在5〜50的范围内。

公开(公告)号：US5626935A

公开(公告)日：1997-05-06

申请号：US307889

申请日：1994-09-16

申请人： Naoyuki Goto ,  Katsuhiko Yamaguchi

发明人： Naoyuki Goto ,  Katsuhiko Yamaguchi

IPC分类号： C03C10/00 ,  C03C23/00 ,  G11B5/73 ,  G11B5/84 ,  G11B5/00

CPC分类号： G11B5/7315 ,  C03C10/00 ,  C03C10/0009 ,  C03C23/007 ,  G11B5/73 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/21 ,  Y10T428/24355

摘要： A magnetic disk substrate is made of a glass-ceramic having crystal phases of lithium disilicate (Li.sub.2 O.2SiO.sub.2) and alpha-quartz (SiO.sub.2). The crystal phase of alpha-quartz is formed of grown crystal grains each having a globular grain structure made of aggregated particles. Each globular grain has a size within a range from 0.3 .mu.m to 3 .mu.m. Surface roughness (Ra) of a polished surface of the magnetic disk substrate is within a range from 15 .ANG. to 50 .ANG. which is an optimum range of surface roughness for the magnetic disk.

摘要翻译： 磁盘基板由具有二硅酸锂（Li 2 O 2·SiO 2）和α-石英（SiO 2）的晶相的玻璃陶瓷制成。 α-石英的晶相由具有由凝集颗粒形成的球状晶粒结构的生长晶粒形成。 每个球状颗粒的尺寸在0.3μm至3μm的范围内。 磁盘基板的抛光表面的表面粗糙度（Ra）在15〜50的范围内，这是磁盘表面粗糙度的最佳范围。

公开(公告)号：US5580363A

公开(公告)日：1996-12-03

申请号：US296369

申请日：1994-08-25

申请人： Naoyuki Goto ,  Katsuhiko Yamaguchi ,  Yasuyuki Kawashima

发明人： Naoyuki Goto ,  Katsuhiko Yamaguchi ,  Yasuyuki Kawashima

IPC分类号： C03C4/02 ,  C03C10/00 ,  C03C10/04 ,  C03C10/06 ,  G11B5/62 ,  G11B5/73 ,  G11B5/733 ,  C03B5/26

CPC分类号： C03C4/02 ,  C03C10/0009 ,  C03C10/0027 ,  C03C10/0036 ,  C03C10/0045

摘要： A method for detecting a defect in a glass-ceramic for magnetic disks includes steps of forming a colored glass-ceramic having Munsell value within the range of 0 to 7 in the CIE color system by subjecting to heat treatment a base glass comprising in weight percent:______________________________________ SiO.sub.2 65-83% Li.sub.2 O 8-13% K.sub.2 O 0-7% MgO + ZnO + PbO 0.5-5.5% in which MgO 0.5-5.5% ZnO 0-5% PbO 0-5% P.sub.2 O.sub.5 1-4% Al.sub.2 O.sub.3 0-7% As.sub.2 O.sub.3 + Sb.sub.2 O.sub.3 0-2% a coloring agent of at least one ingredient 0.5-5% selected from the group consisting of metal oxides of V, Cu, Mn, Cr, Co, Mo, Ni, Fe, Te, Ce, Pr, Nd and Er ______________________________________ and checking the glass-ceramic visually or by means of an automatic checking device for detecting a defect in the glass-ceramic.

摘要翻译： 用于检测磁盘用玻璃陶瓷的缺陷的方法包括以下步骤：在CIE色系中通过对基底玻璃进行热处理，形成具有Munsell值在0至7范围内的着色玻璃陶瓷，所述基底玻璃的重量百分数 ： - SiO2 65-83％ - Li2O 8-13％ - K2O 0-7％ - MgO + ZnO + PbO 0.5-5.5％ - 其中MgO 0.5-5.5％ - ZnO 0-5％ - PbO 0-5％ - P2O5 1-4％-Al2O3 0-7％ - As2O3 + Sb2O3 0-2％ - 至少一种成分为0.5-5％的成分的着色剂，选自V，Cu，Mn，Cr的金属氧化物 Co，Mo，Ni，Fe，Te，Ce，Pr，Nd和Er，并且可视地检测玻璃陶瓷，或通过自动检查装置检测玻璃陶瓷中的缺陷。