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1. 发明申请

WO1993024680A1 PROCESS FOR PRODUCING 'alpha'-ALUMINA 审中-公开
标题翻译：生产α-氧化铝的方法
公开(公告)号：WO1993024680A1
公开(公告)日：1993-12-09
申请号：PCT/JP1993000737
申请日：1993-06-01
申请人： SUMITOMO CHEMICAL COMPANY, LIMITED , MOHRI, Masahide , UCHIDA, Yoshio , SAWABE, Yoshinari , WATANABE, Hisashi
发明人： SUMITOMO CHEMICAL COMPANY, LIMITED
IPC分类号： C30B29/20
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 powdery alpha -alumina comprising single-crystal alpha -alumina grains, which comprises firing transition alumina and/or an alumina source material which yields transition alumina upon heat treatment in an atmospheric gas containing at least 1 vol.% of hydrogen chloride or one containing both of at least 1 vol.% of chlorine and 0.1 vol.% of steam at 600 DEG C or above, preferably from 600 DEG C to 1,400 DEG C, still preferably from 800 DEG C to 1,200 DEG C. Examples of the usable alumina source material include aluminum hydroxide, alum and aluminum sulfate. This process can provide powdery alpha -alumina comprising single-crystal alpha -alumina grains which are highly pure, fine and homogeneous, have a narrow grain size distribution, are not aggregated, and form an at least eight-sided polyhedron from various alumina source materials which are mutually different in kind, purity, form, grain size and composition.
摘要翻译：一种生产包含单晶α-氧化铝颗粒的粉末状α-氧化铝的方法，其包括在含有至少1体积％氯化氢的气氛气体中进行热处理时，焙烧过渡氧化铝和/或氧化铝源材料，产生过渡氧化铝或者在600℃以上，优选600℃〜1400℃，更优选800〜1200℃，同时含有至少1体积％的氯和0.1体积％的蒸汽。可用的氧化铝源材料包括氢氧化铝，明矾和硫酸铝。该方法可以提供包含高纯度，细小且均匀的单晶α-氧化铝颗粒的粉末状α-氧化铝，具有窄的晶粒度分布，不聚集，并由各种氧化铝源材料形成至少八面多面体它们的种类，纯度，形式，粒度和组成相互不同。

2. 发明申请

WO1993024681A1 'alpha'-ALUMINA 审中-公开
标题翻译： α-ALUMINA
公开(公告)号：WO1993024681A1
公开(公告)日：1993-12-09
申请号：PCT/JP1993000738
申请日：1993-06-01
申请人： SUMITOMO CHEMICAL COMPANY, LIMITED , MOHRI, Masahide , UCHIDA, Yoshio , SAWABE, Yoshinari , WATANABE, Hisashi
发明人： SUMITOMO CHEMICAL COMPANY, LIMITED
IPC分类号： C30B29/20
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 powdery alpha -alumina comprising single-crystal alpha -alumina grains which are homogeneous and free from any crystal seed inside, form an at least eight-sided polyhedron, and have a D to H ratio of 0.5 to 3.0 (wherein D is the maximum grain diameter in parallel with the hexagonal lattice plane of the alpha -alumina having a hexagonal closest lattice structure and H is the grain diameter perpendicular to the hexagonal lattice plane thereof), a number-average grain diameter of longer than 5 mu m up to 30 mu m, a sodium content of less than 0.05 wt.% in terms of Na2O and an alumina purity of 99.90 wt.% or above. The powdery alpha -alumina of the invention comprises single-crystal alpha -alumina grains which are highly pure, fine and homogeneous, have a narrow grain size distribution, are not aggregated, and form an at least eight-sided polyhedron. It is suitable as the raw materials of abrasive, sinter, plasma spraying material, filler, single crystal, catalyst support, phosphor, sealing material and ceramic filter, thus being remarkably useful from the industrial viewpoint. In particular, it has such a high purity that it can be used as the raw material of single crystals of, for example, yttrium aluminum garnet (YAG), sapphire and ruby, which cannot be prepared from low-purity alpha -alumina, and as the raw material of high-purity sinter.
摘要翻译：包含均匀且不含任何晶种的单晶α-氧化铝颗粒的粉末状α-氧化铝形成至少八面多面体，D至H比为0.5至3.0（其中D为最大值与具有六角形最接近的格子结构的α-氧化铝的六方晶格平面平行的晶粒直径，H是垂直于其六边形晶格面的晶粒直径），数均粒径长于5μm至30 以Na2O计，钠含量小于0.05重量％，氧化铝纯度为99.90重量％以上。本发明的粉末状α-氧化铝包括高纯度，细小且均匀的单晶α-氧化铝颗粒，具有窄的粒度分布，不聚集，并形成至少八面多面体。适用于磨料，烧结矿，等离子体喷涂材料，填料，单晶，催化剂载体，磷光体，密封材料和陶瓷过滤器的原料，从工业观点来看是非常有用的。特别是具有这样高的纯度，可以将其用作不能由低纯度α-氧化铝制备的例如钇铝石榴石（YAG），蓝宝石和红宝石的单晶的原料，以及作为高纯度烧结矿的原料。

3. 发明申请

WO1995014638A1 PROCESS FOR PRODUCING 'alpha'-ALUMINA POWDER 审中-公开
标题翻译：生产α-氧化铝粉的方法
公开(公告)号：WO1995014638A1
公开(公告)日：1995-06-01
申请号：PCT/JP1994001989
申请日：1994-11-25
申请人： SUMITOMO CHEMICAL COMPANY, LIMITED , MOHRI, Masahide , MATSUDA, Norio , TANAKA, Shinichiro , UCHIDA, Yoshio , SAWABE, Yoshinari , WATANABE, Hisashi , OGAWA, Hiroshi
发明人： SUMITOMO CHEMICAL COMPANY, LIMITED
IPC分类号： C01F07/02
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： An alpha -alumina powder is produced by granulating at least one starting material selected from among transition alumina and alumina compounds and firing the obtained granules in a gaseous atmosphere containing a hydrogen halide, a gaseous atmosphere containing a halogen, or an atmosphere containing a mixture of a halogen gas with steam and at least one halogen compound selected from among at least 0.1 vol.% of hydrogen halide gases and halogen gases. It is possible to produce an alpha -alumina powder having controlled granular form and diameter and a narrow grain size distribution and containing little aggregated granules at a high firing efficiency by granulating the powdery starting material to increase the bulk density and firing the granules in the presence of a halogen.
摘要翻译：通过将选自过渡氧化铝和氧化铝化合物中的至少一种起始材料制粒，并将得到的颗粒在含有卤化氢，含有卤素的气体气氛或含有卤素的气氛的气体气氛中焙烧得到的α-氧化铝粉末，具有蒸汽的卤素气体和选自至少0.1体积％的卤化氢气体和卤素气体中的至少一种卤素化合物。可以制备具有受控颗粒形式和直径的窄的粒度分布的α-氧化铝粉末，并且通过将粉末原料粒化以增加堆积密度并在存在下烧制颗粒的卤素。

4. 发明申请

WO1993024682A1 'alpha'-ALUMINA 审中-公开
标题翻译： α-ALUMINA
公开(公告)号：WO1993024682A1
公开(公告)日：1993-12-09
申请号：PCT/JP1993000739
申请日：1993-06-01
申请人： SUMITOMO CHEMICAL COMPANY, LIMITED , MOHRI, Masahide , UCHIDA, Yoshio , SAWABE, Yoshinari , WATANABE, Hisashi
发明人： SUMITOMO CHEMICAL COMPANY, LIMITED
IPC分类号： C30B29/20
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 powdery alpha -alumina comprising single-crystal alpha -alumina grains which are homogeneous and free from any crystal seed inside, form an at least eight-sided polyhedron, and have a D to H ratio of 0.5 to 3.0 (wherein D is the maximum grain diameter in parallel with the hexagonal lattice plane of the alpha -alumina having a hexagonal closest lattice structure and H is the grain diameter perpendicular to the hexagonal lattice plane thereof), a number-average grain diameter of 0.1 to 5 mu m and a narrow grain size distribution. The powdery alpha -alumina of the invention comprises single-crystal alpha -alumina grains which are nearly spherical, fine and structurally homogeneous and have a narrow grain size distribution, and is suitable as the raw materials of abrasive, sinter, plasma spraying material, filler, single crystal, catalyst support, phosphor, sealing material and ceramic filter, in particular, as the raw materials of precision abrasive, sinter and ceramic filter, thus being remarkably useful from the industrial viewpoint.
摘要翻译：包含均匀且不含任何晶种的单晶α-氧化铝颗粒的粉末状α-氧化铝形成至少八面多面体，D至H比为0.5至3.0（其中D为最大值与具有六角形最接近的格子结构的α-氧化铝的六方晶格平面平行的晶粒直径，H是垂直于其六边形晶格面的晶粒直径），数均粒径为0.1-5μm，窄粒度分布。本发明的粉状α-氧化铝包含近似球形，细微且结构均匀的单晶α-氧化铝颗粒，具有较窄的粒度分布，适用于磨料，烧结矿，等离子喷涂材料，填料的原料，单晶，催化剂载体，荧光粉，密封材料和陶瓷过滤器，特别是作为精密磨料，烧结陶瓷和陶瓷过滤器的原料，从工业观点来看是非常有用的。

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