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1. 发明授权

US6106800A Method for producing alpha-alumina powder 失效
标题翻译：生产α-氧化铝粉末的方法
公开(公告)号：US6106800A
公开(公告)日：2000-08-22
申请号：US880996
申请日：1997-06-23
申请人： Masahide Mohri , Norio Matsuda , Shinichiro Tanaka , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe , Hiroshi Ogawa
发明人： Masahide Mohri , Norio Matsuda , Shinichiro Tanaka , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe , Hiroshi Ogawa
IPC分类号： C01F7/02 , C01F7/30 , C01F7/44
CPC分类号： C01F7/02 , C01F7/30 , C01F7/442 , C01P2004/03 , C01P2004/30 , C01P2004/50 , C01P2004/52 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2006/11 , C01P2006/21 , C01P2006/80
摘要： Alpha alumina powder is produced by granulating at least one alumina starting material selected from group consisting of transition alumina and alumina compound to obtain particles and calcining the particles in a halogen-containing atmosphere which comprises a hydrogen halide gas, a halogen gas or a mixture of a halogen gas and steam and contains at least 0.1 % by volume of at least one halogen-containing gas selected from the group consisting of hydrogen halide gas and halogen gas.By granulating the alumina starting material powder in the form of particles to increase a bulk density and calcining them in the presence of halogen, .alpha.-alumina powder having a regulated particle size and shape and a narrow particle size distribution and containing fewer agglomerated particles is produced at a high calcining efficiency.
摘要翻译：通过造粒选自过渡氧化铝和氧化铝化合物的至少一种氧化铝起始材料来制备α-氧化铝粉末，以获得颗粒并在包含卤化氢气体，卤素气体或卤素气体的混合物的含卤素气氛中煅烧颗粒卤素气体和蒸汽，并且含有至少0.1体积％的选自卤化氢气体和卤素气体的至少一种含卤素气体。通过将颗粒形式的氧化铝原料粉末制粒以提高堆积密度并在卤素存在下煅烧，产生具有调节的粒度和形状以及窄的粒度分布并且含有较少的附聚颗粒的α-氧化铝粉末煅烧效率高。

2. 发明授权

US06524549B1 Method for producing &agr;-alumina powder 失效
标题翻译：生产α-氧化铝粉末的方法
公开(公告)号：US06524549B1
公开(公告)日：2003-02-25
申请号：US08730217
申请日：1996-10-15
申请人： Masahide Mohri , Norio Matsuda , Shinichiro Tanaka , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe , Hiroshi Ogawa
发明人： Masahide Mohri , Norio Matsuda , Shinichiro Tanaka , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe , Hiroshi Ogawa
IPC分类号： C01F700
CPC分类号： C01F7/30 , C01F7/02 , C01F7/442 , C01P2004/03 , C01P2004/30 , C01P2004/50 , C01P2004/52 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2006/11 , C01P2006/21 , C01P2006/80
摘要： Alpha alumina powder having a regulated particle size, a uniform particle shape and a narrow particle size distribution and further a low halogen content is produced by calcining at least one starting material selected from transition alumina and alumina compounds in a halogen-containing atmosphere which comprises a hydrogen halide gas, a halogen gas or a mixture of a halogen gas and steam and contains at least 0.1% by volume of at least one halogen-containing gas selected from the group consisting of hydrogen halide gas and halogen gas, and removing halogen from a calcined material. The produced alpha-alumina powder is excellent in a packing property and homogeneously packed.
摘要翻译：通过在含卤素气氛中煅烧选自过渡氧化铝和氧化铝化合物的至少一种起始材料，制备具有调节粒径，均匀粒子形状和窄粒度分布以及进一步低卤素含量的α-氧化铝粉末，其包含卤化物气体，卤素气体或卤素气体和蒸汽的混合物，并且含有至少0.1体积％的选自卤化氢气体和卤素气体的至少一种含卤素气体，以及从煅烧材料。生产的α-氧化铝粉末具有优异的包装性能并且均匀包装。

3. 发明授权

US06165437A .alpha.-alumina 失效
标题翻译： α-氧化铝
公开(公告)号：US06165437A
公开(公告)日：2000-12-26
申请号：US805044
申请日：1997-02-24
申请人： Masahide Mohri , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe
发明人： Masahide Mohri , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe
IPC分类号： C01F7/02 , C01F7/44 , C30B25/00
CPC分类号： C01F7/442 , C01F7/02 , C01P2004/03 , C01P2004/30 , C01P2004/40 , C01P2004/42 , C01P2004/52 , C01P2004/54 , C01P2004/60 , C01P2004/61 , C01P2004/62 , C01P2006/80 , C30B25/00 , C30B29/20
摘要： .alpha.-Alumina comprising .alpha.-alumina single crystal particles which are homogeneous containing no crystal seed inside the particles; have an octa- or higher polyhedral shape; have a D/H ratio of from 0.5 to 3.0, wherein D represents a maximum particle diameter parallel to a hexagonal lattice plane of a hexagonal close-packed lattice of the particles, and H represents a diameter perpendicular to the hexagonal lattice plane; have a number average particle diameter of more than 5 .mu.m and not more than 30 .mu.m; have a sodium content of less than 5 ppm in terms of Na.sub.2 O; and have an alumina purity of not less than 99.90% by weight. .alpha.-Alumina in a powder form composed of .alpha.-alumina single crystal particles having a high punity, a fine and uniform composition, a narrow particle size distribution, and an octa- or higher polyhedral shape which are not aggromerates. The .alpha.-alumina of the invention is useful as an abrasive, a raw material for sintered products, a raw material for a encapsulations, a raw material for ceramic filters, etc. and, owing to its high purity, particularly useful as a raw material for single crystals, e.g., yttrium aluminum garnet (YAG), sapphire, ruby, etc. and as a raw material for high purity sintered products.
摘要翻译： α-氧化铝，其包含在颗粒内不含晶种的均匀的α-氧化铝单晶颗粒; 具有八面体或更高的多面体形状; D / H比为0.5〜3.0，其中D表示与六方孔密堆积晶格的六方晶格平面平行的最大粒径，H表示垂直于六方晶格面的直径; 数均粒径超过5μm，不超过30μm; 钠含量按Na2O计小于5ppm; 并且具有不小于99.90重量％的氧化铝纯度。由具有高惩罚性，细小且均匀的组成，窄的粒度分布和不具有聚集性的八面体或更高的多面体形状的α-氧化铝单晶颗粒组成的粉末形式的α-氧化铝。本发明的α-氧化铝可用作研磨剂，烧结产品的原料，封装用原料，陶瓷过滤器用原料等，由于其纯度高，特别用作原料用于单晶，例如钇铝石榴石（YAG），蓝宝石，红宝石等，并作为高纯度烧结产品的原料。

4. 发明授权

US06814917B1 Alumina sintered body and process for producing the same 失效
标题翻译：氧化铝烧结体及其制造方法
公开(公告)号：US06814917B1
公开(公告)日：2004-11-09
申请号：US09361118
申请日：1999-07-27
申请人： Hisashi Watanabe , Yoshio Uchida
发明人： Hisashi Watanabe , Yoshio Uchida
IPC分类号： H05B600
CPC分类号： A61L27/105 , C04B35/111 , H01L21/6838
摘要： A process for producing a polycrystalline alumina sintered body which includes the steps of: subjecting alumina powder to ultrasonic irradiation, mechanical stirring not using a grinding medium, or ultrasonic irradiation and mechanical stirring not using a grinding medium, resulting in slurry dispersed in a solvent; drying and forming the slurry to produce a green body; and then sintering the green body in an air atmosphere at a temperature in the range of 1400° C. to 1800° C.; wherein the alumina powder has: a purity of 99.99 wt % or more and includes &agr; alumina particles having polyhedral shape, having substantially no red surface and a D/H ratio of from 0.5 or more to 3.0 or less; the number-average particle size of from 0.1 &mgr;m or more to 1.0 &mgr;m or less; and a D90/D10 ratio of 7 or less.
摘要翻译：一种多晶氧化铝烧结体的制造方法，其特征在于，包括以下步骤：使氧化铝粉末进行超声波照射，不使用研磨介质的机械搅拌，或者不使用研磨介质的超声波照射和机械搅拌，使浆料分散在溶剂中; 干燥和形成浆料以产生生坯; 然后在1400℃〜1800℃的温度的空气气氛中烧结生坯。其中所述氧化铝粉末的纯度为99.99重量％以上，并且包括具有多面体形状的α氧化铝颗粒，其基本上不具有红色表面，D / H比为0.5以上至3.0以下; 数均粒径为0.1μm以上至1.0μm以下; D90 / D10比例为7以下。

5. 发明授权

US06521203B1 Process for producing &agr;-alumina 失效
标题翻译： α-氧化铝生产工艺
公开(公告)号：US06521203B1
公开(公告)日：2003-02-18
申请号：US08922478
申请日：1997-09-03
申请人： Masahide Mohri , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe
发明人： Masahide Mohri , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe
IPC分类号： C01F700
CPC分类号： C01F7/442 , C01F7/02 , C01P2004/03 , C01P2004/30 , C01P2004/40 , C01P2004/42 , C01P2004/52 , C01P2004/54 , C01P2004/60 , C01P2004/61 , C01P2004/62 , C01P2006/80 , C30B25/00 , C30B29/20
摘要： A process for producing &agr;-alumina containing &agr;-alumina single crystal particles characterized in that at least one of a transition alumina and transition alumina precursor is calcined in an atmosphere containing at least 1% by volume of hydrogen chloride at a temperature of not less than 600° C., preferably from 600 to 1,400° C., and more preferably from 800 to 1,200° C. Aluminum hydroxide, alum, aluminum sulfate, etc. are used as the alumina raw material capable of being converted to transition alumina on heating. &agr;-Alumina comprising octahedral or higher polyhedral &agr;-alumina single crystal particles have a high alumina purity above a given level, are fine and homogeneous, have a narrow particle size distribution, are not agglomerated particles, and can be obtained from raw materials of various kinds, purities, shapes, sizes, and compositions.
摘要翻译：一种生产含α-氧化铝的α-氧化铝单晶颗粒的方法，其特征在于，在含有至少1体积％氯化氢的气氛中，在不少于1重量％的温度下煅烧过渡氧化铝和过渡型氧化铝前体中的至少一种 600℃，优选600〜1400℃，更优选800〜1200℃。使用氢氧化铝，明矾，硫酸铝等作为能够在加热时转化为过渡型氧化铝的氧化铝原料。包含八面体或更高的多面体α-氧化铝单晶颗粒的α-氧化铝具有高于给定水平的高氧化铝纯度，细小且均匀，具有窄的粒度分布，不是附聚颗粒，并且可以从各种原料获得种类，纯度，形状，尺寸和组成。

6. 发明授权

US06306788B1 Translucent alumina sintered body and production thereof 有权
标题翻译：半透明氧化铝烧结体及其制造
公开(公告)号：US06306788B1
公开(公告)日：2001-10-23
申请号：US09492194
申请日：2000-01-27
申请人： Hisashi Watanabe , Yoshio Uchida
发明人： Hisashi Watanabe , Yoshio Uchida
IPC分类号： C04B3510
CPC分类号： H01J61/302 , C04B35/115
摘要： A method for producing a translucent alumina sintered body comprising the steps of: forming a raw material powder, and sintering the formed product under the condition of hydrogen atmosphere from atmospheric pressure to vacuum at a temperature of from 1600 to 1900° C., wherein the raw material powder is a mixed powder comprising an &agr;-alumina powder (1) which comprises a polyhedral primary particle having substantially no fractured surface, has a BET specific surface area of 1 to 7 m2/g, and has a purity of 99.99% or more, an alumina powder (2) having a BET specific surface area of 5 to 200 m2/g in an amount of 10% by weight or less based on said &agr;-alumina powder, and a sintering agent, and satisfies the following formula: (BET specific surface area of alumina powder (2))−(BET specific surface area of &agr;-alumina powder (1))>2 m2/g.
摘要翻译：一种半透明氧化铝烧结体的制造方法，其特征在于，在1600〜1900℃的温度下，在大气压下，在氢气氛下，将形成的原料粉末形成原料粉末并真空成型，材料粉末是包含基本上没有断裂表面的多面体一次粒子的α氧化铝粉末（1）的混合粉末，BET比表面积为1〜7m 2 / g，纯度为99.99％以上，相对于所述α-氧化铝粉末，BET比表面积为5〜200m 2 / g的氧化铝粉末（2）的含量为10重量％以下，烧结剂满足下式：

7. 发明授权

US06482761B1 Translucent alumina sintered body and a process for producing the same 失效
标题翻译：半透明氧化铝烧结体及其制造方法
公开(公告)号：US06482761B1
公开(公告)日：2002-11-19
申请号：US09648812
申请日：2000-08-28
申请人： Hisashi Watanabe , Yoshio Uchida
发明人： Hisashi Watanabe , Yoshio Uchida
IPC分类号： C04B3510
CPC分类号： H01J61/302 , C04B35/115
摘要： A translucent alumina sintered body wherein the total content of an alkali metal element and an alkaline earth metal element is 50 ppm or less, and the linear transmittance of a light having a wavelength of 600 nm is 40% or more at a thickness of the sintered body of 0.85 mm.
摘要翻译：一种半透明的氧化铝烧结体，其中碱金属元素和碱土金属元素的总含量为50ppm以下，波长600nm的光的线性透射率为40％以上。身体0.85毫米。

8. 发明授权

US6159441A .alpha.-alumina powder and process for producing the same 有权
标题翻译： α-氧化铝粉末及其制造方法
公开(公告)号：US6159441A
公开(公告)日：2000-12-12
申请号：US286255
申请日：1999-04-06
申请人： Masahide Mohri , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe
发明人： Masahide Mohri , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe
IPC分类号： C01F7/02 , C01F7/32 , C01F7/44 , C30B1/00
CPC分类号： C01F7/32 , C01F7/442 , C01P2004/03 , C01P2004/04 , C01P2004/30 , C01P2004/32 , C01P2004/40 , C01P2004/42 , C01P2004/52 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2006/11 , C01P2006/21
摘要： A process for producing .alpha.-alumina powder comprising the step of calcining at least one of transition alumina and a transition alumina precursor capable of becoming transition alumina on heating, in a gas atmosphere containing (1) a hydrogen halide, (2) a component prepared from a halogen and steam or (3) a halogen, in the presence of at least one of a seed crystal and a shape-controlling agent. The .alpha.-alumina powder is particularly useful as a raw material for abrasives, fillers, sinters or spacers which comprises .alpha.-alumina particles having a substantially octahedral or eicosahedral shape, a specific structure, and a narrow primary particle size distribution.
摘要翻译：一种制备α-氧化铝粉末的方法，包括在含有（1）卤化氢的气体气氛中煅烧过渡氧化铝和能够变为过渡氧化铝的过渡氧化铝前体中的至少一种的步骤，（2）制备的组分在卤素和蒸汽中，或（3）卤素，在晶种和形状控制剂中的至少一种的存在下进行。 α-氧化铝粉末特别可用作研磨剂，填料，烧结体或间隔物的原料，其包含具有基本上八面体或二十八面体形状的α-氧化铝颗粒，特定结构和窄的一次粒度分布。

9. 发明授权

US5935550A .alpha.-alumina powder and process for producing the same 失效
公开(公告)号：US5935550A
公开(公告)日：1999-08-10
申请号：US606679
申请日：1996-02-26
申请人： Masahide Mohri , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe
发明人： Masahide Mohri , Yoshio Uchida , Yoshinari Sawabe , Hisashi Watanabe
IPC分类号： C01F7/02 , C01F7/32 , C01F7/44 , C30B1/00
CPC分类号： C01F7/32 , C01F7/442 , C01P2004/03 , C01P2004/04 , C01P2004/30 , C01P2004/32 , C01P2004/40 , C01P2004/42 , C01P2004/52 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2006/11 , C01P2006/21
摘要： A process for producing .alpha.-alumina powder comprising the step of calcining at least one of transition alumina and a transition alumina precursor capable of becoming transition alumina on heating, in a gas atmosphere containing (1) a hydrogen halide, (2) a component prepared from a halogen and steam or (3) a halogen, in the presence of at least one of a seed crystal and a shape-controlling agent. The .alpha.-alumina powder is particularly useful as a raw material for abrasives, fillers, sinters or spacers which comprises .alpha.-alumina particles having a substantially octahedral or eicosahedral shape, a specific structure, and a narrow primary particle size distribution.

10. 发明申请

US20090308283A1 Zirconium Oxide Powder, Process For Producing The Same, And Material For Thermal Spraying 审中-公开
标题翻译：氧化锆粉，其制造方法和用于热喷涂的材料
公开(公告)号：US20090308283A1
公开(公告)日：2009-12-17
申请号：US12306293
申请日：2007-07-24
申请人： Yoshio Uchida , Kazuo Sadaoka
发明人： Yoshio Uchida , Kazuo Sadaoka
IPC分类号： C08K3/22 , C01G25/02 , B32B5/16
CPC分类号： C01G25/02 , C01G25/00 , C01P2002/72 , C01P2002/76 , C01P2004/03 , C01P2004/51 , C01P2004/61 , C01P2006/12 , C23C4/11 , Y02T50/67 , Y02T50/6765 , Y10T428/2982
摘要： The present invention provides a zirconium oxide powder, a method for producing.the same, and a material for thermal spraying. The material for thermal spraying comprises a zirconium oxide powder comprising polyhedral particles each having not less than 6 faces, wherein the zirconium oxide powder has D50 of not less than 5 μm and less than 15 μm and a D90/D10 of less than 3. D10, D50 and D90 correspond to the point where the cumulative mass from the small-particle-diameter side reaches 10%, 50%, and 90% in the cumulative particle size distribution.
摘要翻译：本发明提供一种氧化锆粉末，其制造方法和热喷涂材料。用于热喷涂的材料包括含有不少于6个面的多面体颗粒的氧化锆粉末，其中氧化锆粉末的D50不小于5μm且小于15μm，D90 / D10小于3.D10 ，D50和D90对应于累积粒度分布中从小粒径侧的累积质量达到10％，50％和90％的点。

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