公开(公告)号：US20090239102A1

公开(公告)日：2009-09-24

申请号：US12477509

申请日：2009-06-03

Applicant: Tatsuo NAGASHIMA ,  Kensuke Nagai ,  Tetsuya Nakashima ,  Kei Maeda

Inventor： Tatsuo NAGASHIMA ,  Kensuke Nagai ,  Tetsuya Nakashima ,  Kei Maeda

IPC: C03C3/095 ,  G11B5/70

CPC classification number: G11B5/7315 ,  C03C3/095

Abstract: To provide glass for a data storage medium substrate, whereby high heat resistance can be obtained.Glass for a data storage medium substrate, which comprises, as represented by mol percentage based on the following oxides, from 55 to 70% of SiO2, from 2.5 to 9% of Al2O3, from 0 to 10% of MgO, from 0 to 7% of CaO, from 0.5 to 10% of SrO, from 0 to 12.5% of BaO, from 0 to 2.5% of TiO2, from 0.5 to 3.7% of ZrO2, from 0 to 2.5% of Li2O, from 0 to 8% of Na2O, from 2 to 8% of K2O and from 0.5 to 5% of La2O3, provided that the total content of Al2O3 and ZrO2 (Al2O3+ZrO2) is at most 12%, and the total content of Li2O, Na2O and K2O (R2O) is at most 12%.

Abstract translation: 为了提供用于数据存储介质基板的玻璃，由此可以获得高耐热性。 用于数据存储介质衬底的玻璃，其以由以下氧化物的摩尔百分数表示的SiO 2为55至70％，Al 2 O 3为2.5至9％，MgO为0至10％，0至7 CaO的0.5〜10％，BaO 0〜12.5％，TiO 2 0〜2.5％，ZrO 2 0.5〜3.7％，Li 2 O 2〜2.5％，Li 2 O 0〜8％ Na 2 O，2〜8％的K 2 O和0.5〜5％的La 2 O 3，条件是Al 2 O 3和ZrO 2（Al 2 O 3 + ZrO 2）的总含量至多为12％，Li 2 O，Na 2 O和K 2 O（R 2 O）的总含量 ）至多12％。

公开(公告)号：US20090239035A1

公开(公告)日：2009-09-24

申请号：US12477285

申请日：2009-06-03

Applicant: Kensuke Nagai ,  Tetsuya Nakashima ,  Kei Maeda ,  Tatsuo Nagashima

Inventor： Kensuke Nagai ,  Tetsuya Nakashima ,  Kei Maeda ,  Tatsuo Nagashima

IPC: B32B5/00 ,  C03C3/085 ,  C03C3/087 ,  C03C3/083

CPC classification number: G11B5/7315 ,  C03C3/085 ,  C03C3/087 ,  G11B7/2531 ,  Y10T428/24355

Abstract: To provide a substrate glass for data storage medium which is excellent in weather resistance even when no additional treatment such as chemical reinforcement treatment is applied and less susceptible to a whitening phenomenon and which has a glass transition temperature of at least 680° C. and is excellent in acid resistance.A substrate glass for data storage medium, which comprises, as represented by mass %, from 47 to 60% of SiO2, from 8 to 20% of Al2O3, from 0 to 8% of MgO, from 0 to 6% of CaO, from 1 to 18% of SrO, from 0 to 13% of BaO, from 1 to 6% of TiO2, from 1 to 5% of ZrO2, from 2 to 8% of Na2O and from 1 to 15% of K2O and which has a glass transition temperature of at least 680° C.

Abstract translation: 为了提供一种数据存储介质的基板玻璃，即使在不进行诸如化学强化处理的附加处理并且不易发生白化现象并且玻璃化转变温度至少为680℃并且是 耐酸性好。 用于数据存储介质的基板玻璃，其以质量％表示，SiO 2为47至60％，Al 2 O 3为8至20％，MgO为0至8％，CaO为0至6％， 1〜18％的SrO，0〜13％的BaO，1〜6％的TiO 2，1〜5％的ZrO 2，2〜8％的Na 2 O和1〜15％的K 2 O， 玻璃化转变温度至少为680℃

公开(公告)号：US06949485B2

公开(公告)日：2005-09-27

申请号：US09870496

申请日：2001-06-01

Applicant: Tetsuya Nakashima ,  Yasumasa Nakao

Inventor： Tetsuya Nakashima ,  Yasumasa Nakao

IPC: C03C3/085 ,  C03C3/087 ,  C03C3/091

CPC classification number: C03C3/085

Abstract: A glass for substrate, which consists, as represented by mass percentage, essentially of: SiO240 to 59%, Al2O3 5 to 20%, B2O3 0 to 8%, MgO 0 to 10%, CaO 0 to 12%, SrO 2 to 20%, BaO 0 to 2%, ZnO 0 to 4%, Li2O 0 to 2%, Na2O 0 to 10%, K2O 0 to 12%, TiO2 0 to 10%, and ZrO2 0 to 5%, wherein MgO+CaO+SrO+BaO is at least 15%.

公开(公告)号：US06313052B1

公开(公告)日：2001-11-06

申请号：US09256213

申请日：1999-02-24

Applicant: Tetsuya Nakashima ,  Kei Maeda ,  Yasumasa Nakao

Inventor： Tetsuya Nakashima ,  Kei Maeda ,  Yasumasa Nakao

IPC: C03C3085

CPC classification number: H01L31/03921 ,  C03C3/085 ,  C03C3/087 ,  H01J17/16 ,  H01J2217/49264 ,  H01L31/0392 ,  Y02E10/50

Abstract: A glass for a substrate, having an average thermal expansion coefficient in the range of from 60×10−7 to 75×10−7/° C. at 50 to 350° C., which consists essentially of the following composition expressed by wt %: wt % SiO2 more than 62 to 74, Al2O3  1 to 15, MgO  0 to 9, CaO  0 to 14, Na2O  0 to 12, K2O  0 to 13, SiO2 + Al2O3 72 to 82, MgO + CaO  5 to 24, Na2O + K2O  1 to 15, MgO + CaO + Na2O + K2O 18 to 28.

Abstract translation: 用于基材的玻璃，其在50至350℃下的平均热膨胀系数在60×10-7至75×10-7 /℃的范围内，其基本上由以wt％表示的以下组成组成：

公开(公告)号：US09023421B2

公开(公告)日：2015-05-05

申请号：US13369395

申请日：2012-02-09

Applicant: Tetsuya Nakashima

Inventor： Tetsuya Nakashima

IPC: C03C3/091 ,  G11B5/84 ,  G11B5/73

CPC classification number: G11B5/8404 ,  C03C3/091 ,  G11B5/7315

Abstract: To provide a method for producing a magnetic disk, whereby a magnetic recording layer is formed at a high temperature. A method for producing a magnetic disk, which comprises a step of forming a magnetic recording layer on a glass substrate having a temperature of at least 550° C., wherein the glass substrate comprises, as represented by mol percentage, from 62 to 74% of SiO2, from 6 to 18% of Al2O3, from 2 to 15% of B2O3 and from 8 to 21%, in total, of at least one component selected from MgO, CaO, SrO and BaO, provided that the total content of the above seven components is at least 95%, and further contains less than 1%, in total, of at least one component selected from Li2O, Na2O and K2O, or contains none of these three components.

Abstract translation: 提供一种制造磁盘的方法，由此在高温下形成磁记录层。 一种制造磁盘的方法，包括在温度至少为550℃的玻璃基板上形成磁记录层的步骤，其中所述玻璃基板包含以摩尔百分比表示的62至74％ 的SiO 2，6〜18％的Al 2 O 3，2〜15％的B 2 O 3和8〜21％的至少1种选自MgO，CaO，SrO和BaO的组分， 上述七种成分为至少95％，进一步含有少于1％的至少一种选自Li 2 O，Na 2 O和K 2 O的成分，或不含这三种成分。

公开(公告)号：US08518545B2

公开(公告)日：2013-08-27

申请号：US13619290

申请日：2012-09-14

Applicant: Shusaku Akiba ,  Kazutaka Ono ,  Jun Endo ,  Shigeki Sawamura ,  Tetsuya Nakashima ,  Yuichi Kuroki

Inventor： Shusaku Akiba ,  Kazutaka Ono ,  Jun Endo ,  Shigeki Sawamura ,  Tetsuya Nakashima ,  Yuichi Kuroki

IPC: B32B17/00 ,  C03C3/083 ,  C03C3/085

CPC classification number: C03C3/087 ,  C03C3/085 ,  C03C21/002 ,  C03C23/007 ,  G02F2001/133302

Abstract: To provide glass to be used for chemically tempered glass which is hardly broken even when flawed.Glass for chemical tempering, which comprises, as represented by mole percentage based on the following oxides, from 65 to 85% of SiO2, from 3 to 15% of Al2O3, from 5 to 15% of Na2O, from 0 and less than 2% of K2O, from 0 to 15% of MgO and from 0 to 1% of ZrO2, and has a total content SiO2+Al2O3 of SiO2 and Al2O3 of at most 88%.

Abstract translation: 提供用于化学钢化玻璃的玻璃，即使有缺陷也难以破损。 用于化学回火的玻璃，其包含以下列氧化物的摩尔百分数表示，65％至85％的SiO 2，3至15％的Al 2 O 3，5至15％的Na 2 O，0和小于2％ 的K 2 O，0〜15％的MgO和0〜1％的ZrO 2，SiO 2和Al 2 O 3的SiO 2 + Al 2 O 3的总含量为88％以下。

公开(公告)号：US08402790B2

公开(公告)日：2013-03-26

申请号：US12909423

申请日：2010-10-21

Applicant: Jun Endo ,  Tetsuya Nakashima

Inventor： Jun Endo ,  Tetsuya Nakashima

IPC: G11B5/84 ,  C03B25/00 ,  G11B5/62

CPC classification number: G11B5/8404 ,  C03B25/025 ,  G11B5/7315

Abstract: To provide a process to improve acid resistance of a glass substrate for an information recording medium.A process for producing a glass substrate for an information recording medium, comprising processing a glass formed into a plate by a float process, a down-draw method or a press method, wherein, in cooling of the glass in the last step where the glass has a temperature of at least its strain point, the time during which the glass temperature is at least its strain point and at most a temperature where the glass viscosity is 1010 dPa·s is at least 13 minutes.

Abstract translation: 提供一种提高信息记录介质的玻璃基板耐酸性的方法。 一种用于信息记录介质的玻璃基板的制造方法，其特征在于，包括通过浮法加工形成为板的玻璃，下拉法或压制法，其中在玻璃的最后工序中，玻璃的冷却 具有至少应变点的温度，玻璃温度至少为其应变点的时间和玻璃粘度为1010dPa·s以下的温度为至少13分钟。

公开(公告)号：US20110152058A1

公开(公告)日：2011-06-23

申请号：US12716467

申请日：2010-03-03

Applicant: Tatsuo NAGASHIMA ,  Kensuke Nagai ,  Tetsuya Nakashima ,  Kei Maeda

Inventor： Tatsuo NAGASHIMA ,  Kensuke Nagai ,  Tetsuya Nakashima ,  Kei Maeda

IPC: C03C3/095

CPC classification number: G11B5/7315 ,  C03C3/095

Abstract: To provide glass for a data storage medium substrate, whereby high heat resistance can be obtained. Glass for a data storage medium substrate, which comprises, as represented by mol percentage based on the following oxides, from 55 to 70% of SiO2, from 2.5 to 9% of Al2O3, from 0 to 10% of MgO, from 0 to 7% of CaO, from 0.5 to 10% of SrO, from 0 to 12.5% of BaO, from 0 to 2.5% of TiO2, from 0.5 to 3.7% of ZrO2, from 0 to 2.5% of Li2O, from 0 to 8% of Na2O, from 2 to 8% of K2O and from 0.5 to 5% of La2O3, provided that the total content of Al2O3 and ZrO2 (Al2O3+ZrO2) is at most 12%, and the total content of Li2O, Na2O and K2O (R2O) is at most 12%.

Abstract translation: 为了提供用于数据存储介质基板的玻璃，由此可以获得高耐热性。 用于数据存储介质衬底的玻璃，其以由以下氧化物的摩尔百分数表示的SiO 2为55至70％，Al 2 O 3为2.5至9％，MgO为0至10％，0至7 CaO的0.5〜10％，BaO 0〜12.5％，TiO 2 0〜2.5％，ZrO 2 0.5〜3.7％，Li 2 O 2〜2.5％，Li 2 O 0〜8％ Na 2 O，2〜8％的K 2 O和0.5〜5％的La 2 O 3，条件是Al 2 O 3和ZrO 2（Al 2 O 3 + ZrO 2）的总含量至多为12％，Li 2 O，Na 2 O和K 2 O（R 2 O）的总含量 ）至多12％。

公开(公告)号：US20110123833A1

公开(公告)日：2011-05-26

申请号：US12909221

申请日：2010-10-21

Applicant: Jun Endo ,  Tetsuya Nakashima

Inventor： Jun Endo ,  Tetsuya Nakashima

IPC: G11B5/706

CPC classification number: G11B5/7315 ,  C03C3/083

Abstract: To provide a glass for an information recording medium substrate, which is excellent in weather resistance.A glass substrate for an information recording medium, which is made of an alkali aluminosilicate glass, wherein the difference obtained by subtracting the glass transition temperature Tg from the fictive temperature Tf, i.e. Tf−Tg, is at most 5° C. The glass substrate for an information recording medium, which comprises, as represented by mol % based on the following oxides, from 64 to 67% of SiO2, from 8 to 10% of Al2O3, from 10 to 13% of Li2O, from 9 to 12% of Na2O, from 0 to 2% of K2O and from 2 to 4% of ZrO2, provided that the total content of Li2O, Na2O and K2O, i.e. Li2O+Na2O+K2O, is from 21 to 25%.

Abstract translation: 提供耐候性优异的信息记录介质基板用玻璃。 用于由铝硅酸铝玻璃制成的信息记录介质的玻璃基板，其中通过从假想温度Tf（即Tf-Tg）减去玻璃化转变温度Tg得到的差值为至多5℃。玻璃基板 对于信息记录介质，其包含以下列氧化物的摩尔％表示：SiO 2 64％〜67％，Al 2 O 3 8〜10％，Li 2 O 10〜13％，Li 2 O 9〜12％ Na 2 O，0〜2％的K 2 O和2〜4％的ZrO 2，条件是Li 2 O，Na 2 O和K 2 O（即Li 2 O + Na 2 O + K 2 O）的总含量为21〜25％。

公开(公告)号：US07838136B2

公开(公告)日：2010-11-23

申请号：US12256172

申请日：2008-10-22

Applicant: Tetsuya Nakashima ,  Kei Maeda ,  Noriaki Shimodaira ,  Atsuyoshi Takenaka

Inventor： Tetsuya Nakashima ,  Kei Maeda ,  Noriaki Shimodaira ,  Atsuyoshi Takenaka

IPC: G11B5/73 ,  C03C3/087

CPC classification number: G11B5/7315 ,  C03C3/083 ,  C03C3/085 ,  C03C4/20 ,  Y10T428/31 ,  Y10T428/315

Abstract: To provide a glass for an information recording media substrate, which is excellent in weather resistance.A glass for an information recording media substrate, which comprises, as represented by mol % based on oxide, from 61 to 66% of SiO2, from 11.5 to 17% of Al2O3, from 8 to 16% of Li2O, from 2 to 8% of Na2O, from 2.5 to 8% of K2O, from 0 to 6% of MgO, from 0 to 4% of TiO2 and from 0 to 3% of ZrO2, provided that Al2O3+MgO+TiO2 is at least 12%, and Li2O+Na2O+K2O is from 16 to 23%, wherein in a case of where B2O3 is contained, its content is less than 1%. The above glass for an information recording media substrate, wherein when the glass is left under steam atmosphere at 120° C. at 0.2 MPa for 20 hours, and the amount of Li, the amount of Na and the amount of K, which precipitate on a surface of the glass are represented as CLi, CNa and CK respectively, CNa is at most 0.7 nmol/cm2, and CLi+CNa+CK is at most 3.5 nmol/cm2.

Abstract translation: 提供耐候性优异的信息记录介质基板用玻璃。 用于信息记录介质基板的玻璃，其以氧化物的摩尔％表示，SiO 2的61至66％，Al 2 O 3的11.5至17％，Li 2 O的8至16％，2至8重量％ 的Na 2 O，2.5〜8％的K 2 O，0〜6％的MgO，0〜4％的TiO 2和0〜3％的ZrO 2，条件是Al 2 O 3 + MgO + TiO 2为至少12％，Li 2 O + Na 2 O + K 2 O为16〜23％，其中，在含有B 2 O 3的情况下，其含量小于1％。 上述用于信息记录介质基板的玻璃，其中当玻璃在蒸气气氛中在120℃下在0.2MPa下放置20小时时，并且Li的量，Na的量和沉淀的K的量 玻璃的表面分别表示为CLi，CNa和CK，CNa为0.7nmol / cm 2以下，CLi + CNa + CK为3.5nmol / cm 3以下。