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51. 发明授权

US6117573A Corrosion-resistant member and a producing process thereof 有权
标题翻译：耐腐蚀构件及其制造方法
公开(公告)号：US6117573A
公开(公告)日：2000-09-12
申请号：US172607
申请日：1998-10-15
申请人： Masao Nishioka , Keiichiro Watanabe
发明人： Masao Nishioka , Keiichiro Watanabe
IPC分类号： C23C16/42 , C04B41/50 , C04B41/87 , C23C16/32 , C23C16/56 , B32B18/00
CPC分类号： C04B41/009 , C04B41/5059 , C04B41/87 , C23C16/325 , C23C16/56 , C04B2111/20 , Y10T428/2495 , Y10T428/24992
摘要： A corrosion-resistant member includes a substrate made of a ceramic material and having a diameter of at least 200 mm, and a film of chemically vapor deposited silicon carbide having a thickness of not less than 0.5 mm and covering at least such a portion of the surface of the substrate that is to contact a corrosive material. A process is disclosed for producing such a corrosion-resistant member, which process includes thermally treating the film at a temperature higher, by not less than 50.degree. C. centigrade, than a film-forming temperature at which the film of silicon carbide is formed, after the formation of the silicon carbide film.
摘要翻译：耐腐蚀构件包括由陶瓷材料制成并具有至少200mm直径的基板和厚度不小于0.5mm的化学气相沉积碳化硅膜，并覆盖至少一部分要接触腐蚀性材料的基板的表面。公开了一种用于制造这种耐腐蚀构件的方法，该方法包括在比形成碳化硅膜的成膜温度更高不低于50℃的温度下热处理该膜，形成碳化硅膜后。

52. 发明授权

US5833917A Process for production of silicon nitride sintered material 失效
标题翻译：氮化硅烧结体的制造方法
公开(公告)号：US5833917A
公开(公告)日：1998-11-10
申请号：US879484
申请日：1997-06-19
申请人： Keiichiro Watanabe , Youky Bessyo
发明人： Keiichiro Watanabe , Youky Bessyo
IPC分类号： C04B35/626 , C04B35/584 , C04B35/593 , C03B15/02 , C04B35/58
CPC分类号： C04B35/5935
摘要： In a process for producing a silicon nitride sintered material, a silicon nitride raw material powder selected from raw material powder lots such that the silicon nitride raw material powder has a dispersion .delta.N.beta..sub.1 of weight fraction of .beta.-silicon nitride, of 65% or less, is used. A process for producing a silicon nitride sintered material controls the firing conditions so that the raw material being fired gives, at any stage of firing, a dispersion .delta.N.beta..sub.2 of weight fraction of .beta.-silicon nitride, of 65% or less between the surface portion and the central portion. The first process allows for production of a silicon nitride sintered material having excellent properties in high-temperature strength, etc., at a high reproducibility and stability. The second process allows for production, of in any production batch, a silicon nitride sintered material very low in scattering of properties (e.g., density and strength) between the central portion and the surface portion.
摘要翻译：在制造氮化硅烧结体的方法中，选自原料粉末批料的氮化硅原料粉末，使得氮化硅原料粉末具有65％的氮化硅原料粉末的重量分数的分散度Nβ1，或更少。一种制造氮化硅烧结材料的方法控制烧制条件，使烧制的原料在任何烧成阶段得到β-硅氮化物重量分数的分散体δNβ2在65％表面部分和中心部分。第一种方法允许以高再现性和稳定性生产具有优异的高温强度等性能的氮化硅烧结材料。第二种方法允许在任何生产批次中生产在中心部分和表面部分之间非常低的散射特性（例如密度和强度）的氮化硅烧结材料。

53. 发明授权

US5691261A Silicon nitride ceramic 失效
标题翻译：氮化硅陶瓷
公开(公告)号：US5691261A
公开(公告)日：1997-11-25
申请号：US589171
申请日：1996-01-22
申请人： Akira Takahashi , Masaaki Masuda , Keiichiro Watanabe
发明人： Akira Takahashi , Masaaki Masuda , Keiichiro Watanabe
IPC分类号： C04B35/626 , C04B35/593 , C04B35/587
CPC分类号： C04B35/5935
摘要： A silicon nitride ceramic possessing excellent strength of the surface, including a silicon nitride and a rare earth oxide compound and being characterized in that the ratio of the transverse rupture strength, at room temperature, of the fired surface used as a tensile surface to the transverse rupture strength, at room temperature, of the worked surface used as a tensile surface subjected to working so as to have a surface roughness of R.sub.max 0.8 .mu.m or less is 0.7 or more, and the strength ratio is satisfied even when any portion besides the fired surface is utilized as the tensile surface to be worked to have a surface roughness of R.sub.max 0.8 .mu.m or less. The present invention also provides a process for producing a silicon nitride ceramic including the steps of: (1) mixing .alpha.-Si.sub.3 N.sub.4 powder and .beta.-Si.sub.3 N.sub.4 powder to obtain a raw material powder which satisfies the formula 0.05.ltoreq..beta./.alpha.+.beta..ltoreq.0.50, in which .alpha. refers to the weight of .alpha.-Si.sub.3 N.sub.4 powder and .beta. refers to the weight of .beta.-Si.sub.3 N.sub.4 powder; (2) mixing at least one sintering aid with the raw material powder; (3) forming the powder mixture to give a compact; and (4) firing the compact at a temperature ranging from 1800.degree. to 2000.degree. C. under a nitrogen atmosphere having an atmospheric pressure of at least 1 atm.
摘要翻译：具有优异的表面强度的氮化硅陶瓷，包括氮化硅和稀土氧化物，其特征在于，用作拉伸表面的烧结表面的横向断裂强度与横向断裂强度之比作为经受加工的表面粗糙度Rmax为0.8μm以下的作为拉伸面的加工面的室温下的断裂强度为0.7以上，即使在除了作为待加工的拉伸面，具有Rmax0.8μm以下的表面粗糙度。本发明还提供了一种制造氮化硅陶瓷的方法，包括以下步骤：（1）将α-Si 3 N 4粉末和β-Si 3 N 4粉末混合以获得满足公式0.05 /β/α+β

54. 发明授权

US5089468A Process for producing bismuth-based superconducting oxide 失效
标题翻译：用于生产基于双相的超导氧化物的方法
公开(公告)号：US5089468A
公开(公告)日：1992-02-18
申请号：US501723
申请日：1990-03-28
申请人： Hitoshi Yoshida , Hitoshi Sakai , Shuichiro Oki , Keiichiro Watanabe , Manabu Yoshida , Toshio Oda
发明人： Hitoshi Yoshida , Hitoshi Sakai , Shuichiro Oki , Keiichiro Watanabe , Manabu Yoshida , Toshio Oda
IPC分类号： C04B35/45 , H01L39/24
CPC分类号： H01L39/2419 , C04B35/4521 , Y10S505/741 , Y10S505/742
摘要： The present process for producing a Bi-based superconducting oxide includes the steps of molding a material powder and subjecting the molded article to partial melting and then to crystallization in the presence of oxygen. In that case, the molded article is annealed, after the partial melting, to the crystallization temperature and subjected to crystallization at that temperature. Also, the article after the crystallization is cooled and the cooled article is heat-treated in an inert gas atmosphere. According to the above process, there can be obtained a Bi-based superconducting oxide having excellent superconducting properties.

55. 发明授权

US5030398A Method of producing a cordierite honeycomb structural body 失效
标题翻译：堇青石蜂窝结构体的制造方法
公开(公告)号：US5030398A
公开(公告)日：1991-07-09
申请号：US320629
申请日：1989-03-08
申请人： Toshiyuki Hamanaka , Keiichiro Watanabe , Kunikazu Hamaguchi , Seiichi Asami
发明人： Toshiyuki Hamanaka , Keiichiro Watanabe , Kunikazu Hamaguchi , Seiichi Asami
IPC分类号： B01J21/14 , B01J35/04 , C04B35/195 , C04B38/00
CPC分类号： B01J35/04 , B01J21/14 , C04B35/195 , C04B38/0006 , Y10T428/24149
摘要： Cordierite honeycomb structural bodies having coefficients of thermal expansion of not more than 1.0x10.sup.-6, an improved thermal shock resistance, a very small leakage amount and an improved heat exchanging efficiency are provided by using very fine particles of kaolin and talc to restrict a total pore volume of a given pore diameter to a given range. The cordierite honeycomb structural bodies are useful in broader fields than conventional ones.

56. 发明授权

US4883781A Heat resisting low expansion zirconyl phosphate-zircon composite 失效
标题翻译：耐热低膨胀型磷酸锆锆石复合材料
公开(公告)号：US4883781A
公开(公告)日：1989-11-28
申请号：US94743
申请日：1987-09-09
申请人： Keiichiro Watanabe , Tsuneaki Ohashi
发明人： Keiichiro Watanabe , Tsuneaki Ohashi
IPC分类号： C04B35/447 , C04B35/48
CPC分类号： C04B35/481 , C04B35/447
摘要： Heat resisting low expansion zirconyl phosphate-zircon composite bodies are disclosed, which contain zirconyl phosphate and zircon as a main crystalline phase and a secondary crystalline phase, respectively. The heat resisting low expansion zirconyl phosphate-zircon composite bodies have a coefficient of thermal expansion in a temperature range from room temperature to 1,400.degree. C. being not more than 30.times.10-7/.degree. C. and a melting point being not less than 1,600.degree. C. The composite bodies have a chemical composition essentially consisting of 58.2 to 65.4% by weight of ZrO.sub.2, 17.4 to 37.1% by weight of P.sub.2 O.sub.5, and 1.5 to 19.0% by weight of SiO.sub.2. The heat resisting low expansion zirconyl phosphate-zircon composite bodies optionally contain MgO and Al.sub.2 O.sub.3 in a total amount of not more than 2.5% by weight or 0.1 to 4% by weight of Nb.sub.2 O.sub.5. A process for producing such zirconyl phosphate-zircon composite bodies is also disclosed.
摘要翻译：公开了耐热低膨胀性磷酸锆锆石复合体，其分别含有磷酸锆和锆石作为主结晶相和二次结晶相。耐热低膨胀型磷酸锆锆锆复合体的体系在室温〜1400℃的温度范围内的热膨胀系数为30×10 -7 /℃以下，熔点为1600℃以上复合体具有基本上由58.2至65.4重量％的ZrO 2，17.4至37.1重量％的P 2 O 5和1.5至19.0重量％的SiO 2组成的化学组成。耐热低膨胀性磷酸锆锆锆复合体任意地含有MgO和Al 2 O 3，其总量不超过2.5重量％或0.1〜4重量％的Nb 2 O 5。还公开了一种制备这种磷酸锆锆石复合体的方法。

57. 发明授权

US4772580A Catalyst carrier of cordierite honeycomb structure and method of producing the same 失效
标题翻译：堇青石蜂窝结构催化剂载体及其制备方法
公开(公告)号：US4772580A
公开(公告)日：1988-09-20
申请号：US936501
申请日：1986-12-01
申请人： Toshiyuki Hamanaka , Keiichiro Watanabe , Takashi Harada , Seiichi Asami
发明人： Toshiyuki Hamanaka , Keiichiro Watanabe , Takashi Harada , Seiichi Asami
IPC分类号： B01J35/04 , C04B35/195 , C04B38/00 , B01J32/00
CPC分类号： B01J35/04 , C04B35/195 , C04B38/0006 , Y10T428/24149
摘要： Catalyst carriers made of cordierite honeycomb structures having low thermal expansion, porosities of not exceeding 30%, high strengths and thin partition walls with high cell density or low cell density are provided by using very fine particles of kaoline and talc which are considered heretofore disadvantageous for producing such catalyst carriers. The catalyst carriers are useful in a broader use field than conventional ones, particularly as catalyst carriers for purifying exhaust gases exited from automobile engines.
摘要翻译：通过使用非常细微的高岭土和滑石颗粒，提供了具有低热膨胀，孔隙率不超过30％，高强度和高细胞密度或细胞密度低的薄隔壁的催化剂载体，其被认为是不利于生产这种催化剂载体。催化剂载体在比现有技术更广泛的应用领域中是有用的，特别是作为用于净化从汽车发动机排出的废气的催化剂载体。

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