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1. 发明授权

US5868953A Method for manufacturing a magnetic disk substrate 失效
标题翻译：磁盘基板的制造方法
公开(公告)号：US5868953A
公开(公告)日：1999-02-09
申请号：US551126
申请日：1995-10-31
申请人： Masashi Maekawa , Nobuo Kawasaki , Yasuyuki Kawashima , Yoshio Karasawa
发明人： Masashi Maekawa , Nobuo Kawasaki , Yasuyuki Kawashima , Yoshio Karasawa
IPC分类号： B24B37/00 , C03C10/00 , C03C10/14 , C03C19/00 , C09K3/14 , G11B5/73 , G11B5/82 , G11B5/84 , B44C1/22
CPC分类号： G11B5/8404 , C03C10/0009 , C03C19/00 , C09K3/1409
摘要： A method for manufacturing a magnetic disk substrate includes a step of polishing a glass-ceramic having a crystal phase consisting of crystal grains having an average diameter of less than 3 .mu.m with a polishing material having a grain diameter smaller than the diameter of the crystal grain. In one aspect of the invention, the glass-ceramic includes lithium disilicate (Li.sub.2 O--2SiO.sub.2) and alpha-quartz (alpha-SiO.sub.2) as predominant crystal phases and grown crystal grains of the alpha-quartz each have a globular grain structure consisting of aggregated particles and have a diameter within a range of 0.3 .mu.m-3.0 .mu.m.
摘要翻译：一种磁盘基板的制造方法，其特征在于，使用具有比晶体直径小的研磨材料研磨具有平均粒径小于3μm的结晶相的结晶相的玻璃陶瓷的工序粮食。在本发明的一个方面，玻璃陶瓷包括二硅酸锂（Li 2 O-2SiO 2）和α-石英（α-SiO 2）作为主要结晶相，并且α-石英的生长晶粒各自具有由聚集的颗粒，直径在0.3μm-3.0μm的范围内。

2. 发明授权

US5567217A Method for manufacturing a crystalized glass magnetic disk substrate 失效
标题翻译：晶体玻璃磁盘基板的制造方法
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。

3. 发明授权

US5391522A Glass-ceramic for magnetic disks and method for manufacturing the same 失效
标题翻译：磁盘用玻璃陶瓷及其制造方法
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。

4. 发明授权

US5607886A Optical glass for mold pressing having softening capability at low temperature 失效
标题翻译：用于模压的光学玻璃在低温下具有软化能力
公开(公告)号：US5607886A
公开(公告)日：1997-03-04
申请号：US540204
申请日：1995-10-06
申请人： Masahiro Onozawa
发明人： Masahiro Onozawa
IPC分类号： C03C3/062
CPC分类号： C03C3/062 , Y10S501/903
摘要： An optical glass having optical constants of a refractive index (Nd) from 1.50 to 1.60 and an Abbe number (.nu.d) ranging from 62 to 73, a transformation temperature (Tg) of 550.degree. C. or below, and barely cracks or sticks to metal molds when the glass is subjected to mold pressing, maintains excellent chemical durability, and having softening capability at a low temperature which can be obtained by restricting the composition of the glass in weight percents within a specific range of a SiO.sub.2 --Al.sub.2 O.sub.3 --P.sub.2 O.sub.5 --R.sub.2 O system.
摘要翻译：光学玻璃的折射率（Nd）为1.50〜1.60，阿贝数（nu d）为62〜73，转变温度（Tg）为550℃以下，光滑的裂纹或棒状当玻璃经受模压时，保持优异的化学耐久性，并且在低温下具有软化能力，可以通过将SiO 2 -Al 2 O 3 -P 2 O 5的特定范围内的重量百分比的玻璃的组成 -R2O系统

5. 发明授权

US5942793A Low alpha-ray level glass and method for manufacturing the same 失效
标题翻译：低α射线水平玻璃及其制造方法
公开(公告)号：US5942793A
公开(公告)日：1999-08-24
申请号：US838697
申请日：1997-04-25
申请人： Tatsuya Senoo , Hisao Yatsuda
发明人： Tatsuya Senoo , Hisao Yatsuda
IPC分类号： C03C3/115 , C03C3/118 , C03C3/095 , C03C3/108
CPC分类号： C03C3/118 , C03C3/115
摘要： A low alpha-ray level glass which emits only an extremely small amount of alpha-ray while maintaining excellent chemical durability, coefficient of thermal expansion and hardness is obtained by introducing fluorine into a SiO.sub.2 --B.sub.2 O.sub.3 --Al.sub.2 O.sub.3 --R.sub.2 O (R being an alkali metal) system glass of a specific content range. The amount of alpha-ray emitted from this glass is below 0.02 count/cm.sup.2.hr.
摘要翻译：通过将氟引入到SiO 2 -B 2 O 3 -Al 2 O 3 -R 2 O（R是碱金属）中，可获得仅发射极少量的α射线同时保持优异的化学耐久性，热膨胀系数和硬度的低α射线水平玻璃）系统玻璃的特定内容范围。从该玻璃发射的α射线的量低于0.02旦/ cm2.hr。

6. 发明授权

US5626935A Magnetic disk substrate and method for manufacturing the same 失效
标题翻译：磁盘基板及其制造方法
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。

7. 发明授权

US5591682A Low expansion transparent glass-ceramic 失效
标题翻译：低膨胀透明玻璃陶瓷
公开(公告)号：US5591682A
公开(公告)日：1997-01-07
申请号：US458345
申请日：1995-06-02
申请人： Naoyuki Goto
发明人： Naoyuki Goto
IPC分类号： C03C3/097 , C03C10/00 , C03C10/14
CPC分类号： C03C10/0045
摘要： A low expansion glass-ceramic which has a coefficient of thermal expansion (.alpha..times.10.sup.-7 /.degree.C.) within the range of from -5 to +5 within a temperature range of from -60.degree. C. to +160.degree. C., has a remarkably reduced variation of 10 ppm or below in relative length of .DELTA.1/1, has an excellent optical homogeneity owing to reduced melting temperature in the base glass, and has an improved transparency is obtained by restricting the ratio in weight of P.sub.2 O.sub.5 to SiO.sub.2 within the range of from 0.08 to 0.20, and adding Li.sub.2 O, MgO, ZnO, CaO and BaO of specific content ranges as essential ingredients in a base glass of a SiO.sub.2 -P.sub.2 O.sub.5 -Al.sub.2 O.sub.3 -Li.sub.2 O system containing TiO.sub.2 and ZrO.sub.2 as nucleating agents, and As.sub.2 O.sub.3 as an optional ingredient.
摘要翻译：在-60℃至+160℃的温度范围内具有在-5至+5范围内的热膨胀系数（α×10 -7 /℃）的低膨胀玻璃陶瓷。，在DELTA 1/1的相对长度上具有10ppm以下的显着降低的变化，由于底玻璃中的熔融温度降低而具有优异的光学均匀性，并且通过限制P2O5的重量比获得了改进的透明度 SiO 2的含量范围为0.08〜0.20，在含有TiO 2和ZrO 2作为成核剂的SiO 2 -P 2 O 5·Al 2 O 3 -Li 2 O体系的基础玻璃中添加特定含量的Li 2 O，MgO，ZnO，CaO和BaO作为必要成分，As2O3作为任选成分。

8. 发明授权

US5588979A Apparatus for continuously forming and processing a glass-ceramic 失效
标题翻译：用于连续地形成和加工玻璃陶瓷的装置
公开(公告)号：US5588979A
公开(公告)日：1996-12-31
申请号：US371387
申请日：1995-01-11
申请人： Mutsumi Miyazaki , Toshiaki Yoshida
发明人： Mutsumi Miyazaki , Toshiaki Yoshida
IPC分类号： C03B7/07 , C03B7/10 , C03B7/14 , C03B11/02 , C03B11/06 , C03B11/08 , C03B32/02 , C03B11/00
CPC分类号： C03B11/088 , C03B11/02 , C03B11/06 , C03B32/02 , C03B7/07 , C03B7/10 , C03B7/14 , C03B2215/44
摘要： An apparatus for continuously forming a glass-ceramic which melts raw materials and forms melted glass to a predetermined shape without cutting the melted glass and thereafter continuously crystallizes the formed glass to the glass-ceramic is provided. The apparatus includes a melting device for melting raw materials, a flow tube for conveying the melted glass, a flow quantity control device connected to the flow tube for controlling the flow quantity of the melted glass, a pressing device for pressing the melted glass from the flow tube into a predetermined form, a glass preform checking device for measuring the weight or volume of the glass preform and feeding back a difference signal corresponding to a difference between the measured value of the weight or volume and a reference value to the flow quantity control device, the flow quantity control device controlling the quantity of the melted glass flowing through the flow tube in response to the difference signal to reduce the difference between the measured value and the reference value, and a crystallizing device for crystallizing the glass preform. The flow tube has an inner diameter which becomes smaller toward a melted glass outlet.
摘要翻译：提供一种用于连续地形成将原料熔化并形成熔融玻璃至预定形状而不切割熔融玻璃并随后将形成的玻璃连续结晶化成玻璃陶瓷的玻璃陶瓷的设备。该装置包括用于熔化原料的熔化装置，用于输送熔融玻璃的流动管，连接到用于控制熔融玻璃的流量的流动管的流量控制装置，用于将熔融玻璃从流量管成预定形式，玻璃预制件检查装置，用于测量玻璃预型件的重量或体积，并将与重量或体积的测量值和参考值之间的差相对应的差异信号反馈到流量控制装置，所述流量控制装置响应于所述差分信号控制流过所述流管的熔融玻璃的量，以减小所述测量值与所述参考值之间的差异，以及用于使所述玻璃预制件结晶的结晶装置。流动管具有朝向熔融的玻璃出口变小的内径。

9. 发明授权

US5580363A Method for detecting a defect in a glass-ceramic for magnetic disks 失效
标题翻译：用于检测用于磁盘的玻璃陶瓷中的缺陷的方法
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。

10. 发明授权

US5561089A Glass-ceramic for information recording disk 失效
标题翻译：玻璃陶瓷信息记录盘
公开(公告)号：US5561089A
公开(公告)日：1996-10-01
申请号：US508490
申请日：1995-07-28
申请人： Futoshi Ishizaki , Naoyuki Goto , Masashi Maekawa
发明人： Futoshi Ishizaki , Naoyuki Goto , Masashi Maekawa
IPC分类号： C03C10/04 , C03C10/00 , G11B5/73 , G11B11/105 , C03C3/087 , C03C3/093
CPC分类号： G11B11/10582 , C03C10/0045 , G11B11/10584 , G11B11/10586 , G11B5/7315
摘要： Glass-ceramic for information recording disks have a crystalline structure suitably used for substrate materials and the like for magnetic disks and magneto-optic disks as well as have improved surface characteristics obtained by polishing the glass, and besides the base glass thereof is excellent in melting properties and moldability thereof. The base glass composition consists essentially of ingredients of SiO.sub.2 -Al.sub.2 O.sub.3 -ZnO-MgO-CaO-SrO-BaO-TiO.sub.2 system. The main crystalline phase of the glass-ceramic produced by heat-treating the base glass having a viscosity of log .eta.=3.0 poise or less at 1250.degree. C. is gahnite, a size of the crystal grain is within a range of from 50 to 1000 Angstrom, and a degree of surface roughness (Ra) of the polished glass-ceramic is within a range of from 0.5 to 9.0 Angstrom.
摘要翻译：用于信息记录盘的玻璃陶瓷具有适用于磁盘和磁光盘的基板材料等的晶体结构，并且具有通过研磨玻璃而获得的改进的表面特性，此外，其基础玻璃的熔融性优异性能和成型性。基础玻璃组合物基本上由SiO 2 -Al 2 O 3 -ZnO-MgO-CaO-SrO-BaO-TiO 2体系的成分组成。通过在1250℃下对log eta = 3.0泊或更小的粘度进行热处理制备的玻璃陶瓷的主结晶相是霰石，晶粒尺寸在50〜抛光玻璃 - 陶瓷的表面粗糙度（Ra）在0.5〜9.0埃的范围内。

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