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1. 发明授权

US5089448A Silicon nitride sintered body having excellent high-temperature strength and method of producing same 失效
标题翻译：具有优异的高温强度的硅氮化物烧结体及其生产方法
公开(公告)号：US5089448A
公开(公告)日：1992-02-18
申请号：US632423
申请日：1990-12-24
申请人： Yasunobu Kawakami , Kagehisa Hamazaki , Toshihiko Arakawa , Toshiyuki Mori
发明人： Yasunobu Kawakami , Kagehisa Hamazaki , Toshihiko Arakawa , Toshiyuki Mori
IPC分类号： C04B35/584 , C04B35/593 , C04B35/626
CPC分类号： C04B35/584 , C04B35/5935
摘要： A silicon nitride sintered body having a composition of 1.5-3.0 weight % of Y.sub.2 O.sub.3, 0.1-1.0 weight % of Al.sub.2 O.sub.3 and balance substantially Si.sub.3 N.sub.4, a weight ratio of Y.sub.2 O.sub.3 /Al.sub.2 O.sub.3 being 2.5 or more, which has a density of 3.0 g/cm.sup.3 or more and has a structure in which the minor axes of grains are substantially 6 .mu.m or less. This silicon nitride sintered body is produced by preparing a powder mixture containing Y.sub.2 O.sub.3 powder, Al.sub.2 O.sub.3 powder and silicon nitride powder in the above proportions, the silicon nitride powder having an oxygen content of 1.2 weight % or less, a specific surface area of 9-11 m.sup.2 /g and a metal impurity content of 200 ppm or less; and sintering the powder mixture at a temperature of 1900.degree.-2100.degree. C. and a pressure of 5 kg/cm.sup.2 G or more in a nitrogen atmosphere.

2. 发明授权

US5017530A Silicon nitride sintered body and process for preparation thereof 失效
标题翻译：氮化硅烧结体及其制备方法
公开(公告)号：US5017530A
公开(公告)日：1991-05-21
申请号：US401508
申请日：1989-08-30
申请人： Toshihiko Arakawa , Toshiyuki Mori , Yoshihiro Matsumoto
发明人： Toshihiko Arakawa , Toshiyuki Mori , Yoshihiro Matsumoto
IPC分类号： C04B35/584 , C04B35/593
CPC分类号： C04B35/5935 , C04B35/584
摘要： A silicon nitride sintered body comprised of 1.5 to 3.0% by weight of Y.sub.2 O.sub.3, 0.1 to 1.0% by weight of Al.sub.2 O.sub.3 and 96 to 98.4% by weight of Si.sub.3 N.sub.4 wherein the Y.sub.2 O.sub.3 /Al.sub.2 O.sub.3 weight ratio is at least 2.5, and having a density of at least 3.0 g/cm.sup.3, exhibits a high oxidation resistance and a high strength at a high temperature. This silicon nitride sintered body is prepared by sintering a powdery mixture consisting essentially of 1.5 to 3.0% by weight of Y.sub.2 O.sub.3 powder, 0.1 to 1.0% by weight of Al.sub.2 O.sub.3 powder, and 96 to 98.4% by weight of Si.sub.3 N.sub.4 powder, the Y.sub.2 O.sub.3 /Al.sub.2 O.sub.3 weight ratio being at least 2.5, the oxygen content in the Si.sub.3 N.sub.4 powder being less than 2.0% by weight and the total metallic impurity content in the Si.sub.3 N.sub.4 being less than 200 ppm, at a temperature of 1,850.degree. to 2,000.degree. C. in a non-oxidizing atmosphere.

3. 发明授权

US4770830A Process for preparation of high .alpha.-type silicon nitride powder 失效
标题翻译：高α型氮化硅粉末的制备方法
公开(公告)号：US4770830A
公开(公告)日：1988-09-13
申请号：US943624
申请日：1986-12-18
申请人： Toshihiko Arakawa , Kuniyoshi Ueda , Naomichi Sakai , Takaaki Tsukidate
发明人： Toshihiko Arakawa , Kuniyoshi Ueda , Naomichi Sakai , Takaaki Tsukidate
IPC分类号： C01B21/068 , C01B33/06
CPC分类号： B82Y30/00 , C01B21/0687 , C01P2004/50 , C01P2004/64 , C01P2006/10
摘要： Disclosed is a process for the preparation of high .alpha.-type silicon nitride powder, wherein a nitrogen-containing silane compound and/or amorphous silicon nitride is crystallized to form crystalline silicon nitride. In this process, crystalline silicon nitride having a particle size not larger than 0.05 .mu.m is incorporated in an amount of at least 0.1% by weight into the nitrogen-containing silane compound and/or amorphous silicon nitride, the mixture is formed into a power or molded body having a powder bulk density of at least 0.1 g/cm.sup.3 as silicon, and the powder or molded body is heated to 1,350.degree. to 1,700.degree. C. while controlling the temperature-elevating rate to at least 15.degree. C./min throughout the temperature range of from 1,200.degree. to 1,350.degree. C. The resulting high .alpha.-type silicon nitride is composed of a fine granular crystal and the does not contain a needle crystal or columnar crystal.
摘要翻译：公开了一种制备高α型氮化硅粉末的方法，其中含氮硅烷化合物和/或非晶氮化硅结晶以形成结晶氮化硅。在该方法中，将粒径不大于0.05μm的结晶氮化硅以至少0.1重量％的量掺入含氮硅烷化合物和/或非晶氮化硅中，将该混合物形成为电力或具有至少0.1g / cm 3的粉末堆积密度的成型体作为硅，并将粉末或模塑体加热至1350℃至1,700℃，同时将升温速率控制在至少15℃/分钟在1200-11350℃的温度范围内。所得到的高α型氮化硅由细晶粒状晶体构成，不含有针晶或柱状晶体。

4. 发明授权

US4612297A Process for preparation of silicon nitride powder of good sintering property 失效
标题翻译：具有良好烧结性能的氮化硅粉末制备方法
公开(公告)号：US4612297A
公开(公告)日：1986-09-16
申请号：US558884
申请日：1983-12-07
申请人： Kiyoshi Kasai , Takaaki Tsukidate , Shinji Nagata , Toshihiko Arakawa
发明人： Kiyoshi Kasai , Takaaki Tsukidate , Shinji Nagata , Toshihiko Arakawa
IPC分类号： C04B35/626 , C01B21/068 , C04B35/584 , C04B35/58
CPC分类号： C04B35/584
摘要： A silicon nitride powder having an enhanced sintering activity is prepared by heating a mixture of a nitrogen-containing silane compound and a sintering aid in a non-oxidizing atmosphere.
摘要翻译：通过在非氧化性气氛中加热含氮硅烷化合物和烧结助剂的混合物来制备具有增强的烧结活性的氮化硅粉末。

5. 发明授权

US4716028A Process for preparation of high-type silicon nitride powder 失效
标题翻译：制备高型氮化硅粉末的方法
公开(公告)号：US4716028A
公开(公告)日：1987-12-29
申请号：US829171
申请日：1986-02-14
申请人： Kiyoshi Kasai , Takaaki Tsukidate , Toshihiko Arakawa
发明人： Kiyoshi Kasai , Takaaki Tsukidate , Toshihiko Arakawa
IPC分类号： C01B21/068 , C04B35/584 , C01B33/06
CPC分类号： C04B35/584 , C01B21/068 , C01P2002/04 , C01P2004/62 , C01P2006/10
摘要： A high .alpha.-type silicon nitride powder is prepared by thermally decomposing a mixture of a crystalline silicon nitride powder having an oxygen content of at least 1.0% by weight and a nitrogen-containing silane compound.
摘要翻译：通过将氧含量为至少1.0重量％的结晶氮化硅粉末和含氮硅烷化合物的混合物热分解来制备高α型氮化硅粉末。

6. 发明授权

US5926595A Optical fiber connector part and process for producing the same 失效
标题翻译：光纤连接器部件及其制造方法
公开(公告)号：US5926595A
公开(公告)日：1999-07-20
申请号：US974650
申请日：1997-11-19
申请人： Koji Matsui , Kuniyoshi Ueda , Toshihiko Arakawa , Michiharu Ogawa
发明人： Koji Matsui , Kuniyoshi Ueda , Toshihiko Arakawa , Michiharu Ogawa
IPC分类号： G02B6/38 , G02B6/36
CPC分类号： G02B6/3859 , G02B6/3865
摘要： A novel optical fiber connector part is provided which comprises a ferrule having a capillary hole for holding an optical fiber, the ferrule being formed from a zirconia-alumina composite oxide containing yttria at a content ranging from 2 to 4 mol % in zirconia. In the optical fiber connector part, a sleeve for connecting and holding the ferrule may be formed from zirconia and/or a zirconia-alumina composite oxide. A process for producing the optical fiber connector part is provided wherein the granular zirconia-alumina composed of a particulate zirconia-alumina mixture having an average particle diameter of not more than 1 .mu.m is used as raw material. The granular zirconia-alumina preferably contains alumina at a content ranging from 0.1% to 50% by weight. The process comprises spray-drying a slurry containing a particulate zirconia-alumina mixture having an average particle diameter of not more than 1 .mu.m. The ferrule has a stable spherical face at the tip, and will not deform during long-term connection. The granular zirconia-alumina has excellent sintering characteristics.
摘要翻译：提供了一种新颖的光纤连接器部件，其包括具有用于保持光纤的毛细孔的套圈，所述套圈由氧化锆中含有2至4摩尔％含量的含氧化钇的氧化锆 - 氧化铝复合氧化物形成。在光纤连接器部分中，用于连接和保持套圈的套筒可以由氧化锆和/或氧化锆 - 氧化铝复合氧化物形成。提供了一种用于制造光纤连接器部件的方法，其中使用由平均粒径不大于1μm的颗粒状氧化锆 - 氧化铝混合物构成的粒状氧化锆 - 氧化铝作为原料。粒状氧化锆 - 氧化铝优选含有0.1〜50重量％的氧化铝。该方法包括喷雾干燥含有平均粒径不大于1μm的颗粒氧化锆 - 氧化铝混合物的浆料。套管在尖端处具有稳定的球面，并且在长期连接期间不会变形。粒状氧化锆 - 氧化铝具有优异的烧结特性。

7. 发明授权

US5409415A Shot method 失效
标题翻译：射击法
公开(公告)号：US5409415A
公开(公告)日：1995-04-25
申请号：US83037
申请日：1993-06-29
申请人： Toshio Kawanami , Hiroshi Ohnishi , Hiroyuki Matsumura , Michiyuki Aimoto , Toshihiko Arakawa , Michiharu Ogai
发明人： Toshio Kawanami , Hiroshi Ohnishi , Hiroyuki Matsumura , Michiyuki Aimoto , Toshihiko Arakawa , Michiharu Ogai
IPC分类号： B24C11/00 , C09K3/14
CPC分类号： C09K3/1418 , B24C11/00
摘要： A shot method wherein a shot media based on zirconia composed of a sintered body of partially stabilized zirconia, of which a substantial quantity of the shot media pass through a sieve of normal sizes with apertures of 2.36 mm or less, of which the mean relative density against the theoretical density of zirconia is not less than 95%, of which the mean grain size is not more than 1.0 .mu.m, and which has a mean Vickers hardness of not less than 1,000 kgf/mm.sup.2, is shot to a work surface.
摘要翻译：一种射出方法，其中基于由部分稳定的氧化锆的烧结体组成的氧化锆的喷丸介质，其中大量的喷丸介质通过具有2.36mm或更小的孔的正常尺寸的筛，其平均相对密度相对于氧化锆的理论密度不小于95％，其平均粒径不大于1.0μm，平均维氏硬度不小于1000kgf / mm2，被喷射到工作表面。

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