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1. 发明申请

WO1989007011A1 APPARATUS AND METHOD FOR PRODUCING UNIFORM, FINE BORON-CONTAINING CERAMIC POWDERS 审中-公开
标题翻译：用于生产均质的装置和方法，含微孔陶瓷粉末
公开(公告)号：WO1989007011A1
公开(公告)日：1989-08-10
申请号：PCT/US1989000399
申请日：1989-02-01
申请人： THE DOW CHEMICAL COMPANY
发明人： THE DOW CHEMICAL COMPANY , WEIMER, Alan, W. , MOORE, William, G. , ROACH, Raymond, P.
IPC分类号： B01J19/08
CPC分类号： B82Y30/00 , B01J8/0095 , B01J8/12 , B01J2208/00495 , C01B21/0645 , C01B32/907 , C01B32/956 , C01B35/04 , C01P2002/85 , C01P2004/03 , C01P2004/04 , C01P2004/52 , C01P2004/61 , C01P2004/62 , C01P2004/64 , C01P2004/80 , C01P2006/12 , C01P2006/80 , C01P2006/90 , C04B35/563
摘要： Uniform, boron-containing ceramic powders are prepared by using an apparatus where boric oxide or a hydrate thereof and a carbon source are passed through a cooled reactant transport (6) at a temperature below the melt temperature of the reactants. The reactant transport (6) communicates with a reactor chamber (16) and includes a gas-flow space (20) along the perimeter of the transport (6). The reactants are passed to a reactor (16) having a heating means (40) where the reactants are reacted at a temperature above 1400°C. The resulting uniform, boron-containing ceramic powders are then cooled in cooling chamber (42).

2. 发明申请

WO1992019534A1 PROCESS FOR PREPARING ALUMINIUM NITRIDE POWDER VIA CONTROLLED COMBUSTION NITRIDATION 审中-公开
标题翻译：通过控制燃烧氮气制备氮化铝粉末的方法
公开(公告)号：WO1992019534A1
公开(公告)日：1992-11-12
申请号：PCT/US1991009372
申请日：1991-12-13
申请人： THE DOW CHEMICAL COMPANY
发明人： THE DOW CHEMICAL COMPANY , WEIMER, Alan, W. , HENLEY, John, P. , COCHRAN, Gene, A. , EISMAN, Glenn, A. , MOORE, William, G.
IPC分类号： C01B21/072
CPC分类号： C01B21/0722 , C01P2004/03 , C01P2006/12 , C01P2006/80
摘要： Rapidly heat powdered aluminum metal, whether alone or in admixture with a previously prepared aluminum nitride powder or a powdered removable or compatible material, in the presence of a source of nitrogen to a temperature within a range of 1873 to 2373 K to convert the powdered aluminum metal to aluminum nitride, then promptly quench the aluminum nitride product. Substantially all of the aluminum metal particles are heated at a heating rate of from 100 K to 10,000,000 K per second. The aluminum metal powder or admixture containing aluminum metal powder is maintained at that temperature for period of 0.2 to 10 seconds. The product has a surface area between 2 and 8 square meters per gram and an oxygen content of less than 1.2 weight percent.

3. 发明申请

WO1997010176A1 METHOD TO PRODUCE A TRANSITION METAL CARBIDE FROM A PARTIALLY REDUCED TRANSITION METAL COMPOUND 审中-公开
标题翻译：从部分还原过渡金属化合物生产过渡金属碳化物的方法
公开(公告)号：WO1997010176A1
公开(公告)日：1997-03-20
申请号：PCT/US1996014521
申请日：1996-09-10
申请人： THE DOW CHEMICAL COMPANY
发明人： THE DOW CHEMICAL COMPANY , DUNMEAD, Steven, D. , NILSEN, Kevin, J. , LASHER, Gabrielle, R. , REPMAN, Joseph, F. , BARKER, Hobart, A. , WEIMER, Alan, W.
IPC分类号： C01B31/30
CPC分类号： C01B32/949 , C01B32/914 , C01P2002/72 , C01P2004/62 , C01P2006/11 , C01P2006/12 , C01P2006/80
摘要： A transition metal carbide is formed from a precursor mixture comprising at least one of the group consisting of: a transition metal, a transition metal carbide and a transition metal oxide. The precursor mixture may contain the desired transition metal carbide (for example, WC), but if the desired transition metal carbide is present in the precursor mixture, there is necessarily a significant amount of another compound such as a transition metal oxide, undesired carbide (for example, W2C) or transition metal. The method involves forming an admixture by mixing the precursor mixture with a sufficient amount of carbon to carburize the precursor mixture to the transition metal carbide and reacting the admixture in an inert or reducing atmosphere at a temperature for a time sufficient to convert the admixture to the transition metal carbide, wherein the admixture is reacted in the presence of a means to enhance transfer of heat into the admixture, an inert or reducing gas flowing through at least a portion of the admixture or combination thereof.
摘要翻译：过渡金属碳化物由包含过渡金属，过渡金属碳化物和过渡金属氧化物中的至少一种的前体混合物形成。前体混合物可以含有所需的过渡金属碳化物（例如WC），但是如果所需的过渡金属碳化物存在于前体混合物中，则必须有大量的其它化合物，例如过渡金属氧化物，不期望的碳化物例如，W2C）或过渡金属。该方法包括通过将前体混合物与足量的碳混合来形成混合物，以将前体混合物渗碳至过渡金属碳化物，并将该混合物在惰性或还原性气氛中，在足以将混合物转化为过渡金属碳化物，其中所述混合物在增加热量进入所述混合物的手段的存在下反应，惰性或还原气体流过所述混合物的至少一部分或其组合。

4. 发明申请

WO1995028366A1 SILICON NITRIDE/SILICON CARBIDE COMPOSITE POWDERS, THEIR PREPARATION AND DENSIFIED MATERIALS PREPARED USING THE COMPOSITE POWDERS 审中-公开
标题翻译：硅氮化物/碳化硅复合粉末，其制备和使用复合粉末的稀释材料
公开(公告)号：WO1995028366A1
公开(公告)日：1995-10-26
申请号：PCT/US1995004573
申请日：1995-04-14
申请人： THE DOW CHEMICAL COMPANY
发明人： THE DOW CHEMICAL COMPANY , DUNMEAD, Stephen, D. , WEIMER, Alan, W. , CARROLL, Daniel, F. , EISMAN, Glenn, A. , COCHRAN, Gene, A. , SUSNITZKY, David, W. , BEAMAN, Donald, R. , NILSEN, Kevin, J.
IPC分类号： C04B35/584
CPC分类号： B82Y30/00 , C01B21/0685 , C01P2004/62 , C01P2004/64 , C01P2006/10 , C01P2006/12 , C04B35/584 , C04B35/593
摘要： Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.
摘要翻译：通过结晶二氧化硅粉末，碳粉末和任选的结晶氮化硅粉末的碳热还原制备氮化硅 - 碳化硅复合粉末。复合粉末的结晶碳化硅部分的平均数直径小于约700纳米并含氮。复合粉末可用于制备烧结陶瓷体和自增强氮化硅陶瓷体。

5. 发明申请

WO1995004703A1 METHOD FOR MAKING SUBMICROMETER CARBIDES, SUBMICROMETER SOLID SOLLUTION CARBIDES, AND THE MATERIAL RESULTING THEREFROM 审中-公开
标题翻译：制备助剂的方法，固体溶解碳化物及其制备的材料
公开(公告)号：WO1995004703A1
公开(公告)日：1995-02-16
申请号：PCT/US1994005963
申请日：1994-05-26
申请人： THE DOW CHEMICAL COMPANY
发明人： THE DOW CHEMICAL COMPANY , DUNMEAD, Stephen, D. , MOORE, William, G. , WEIMER, Alan, W. , EISMAN, Glenn, A. , HENLEY, John, P.
IPC分类号： C01B31/30
CPC分类号： C04B35/5622 , B82Y30/00 , C01B32/914 , C01B32/921 , C01B32/949 , C04B35/5607 , C04B35/5611 , C04B35/5626 , C04B35/62615 , C04B35/6265 , C04B35/62675 , C04B35/6268 , C04B2235/3232 , C04B2235/3244 , C04B2235/3251 , C04B2235/3256 , C04B2235/3258 , C04B2235/3839 , C04B2235/3843 , C04B2235/3847 , C04B2235/424 , C04B2235/5445 , C04B2235/5454 , C04B2235/761
摘要： A method for making submicrometer metallic carbides and submicrometer solid solution metallic carbides from a source of at least one metallic oxide and carbon involves the rapid heating of a reactive particulate mixture of the source(s) and carbon in order to achieve a resulting particulate size of less than 1 micrometer. The rapid heating may produce either a finished product or a precursor. If a precursor is produced, it may be admixed with additional carbon and subjected to a second rapid heating step to prepare a finished product. Submicrometer sized metallic carbides and solid solution metallic carbides were suitable for use in commercial ceramic applications. The smaller sized particles produce a product having superior toughness and hardness.
摘要翻译：从至少一种金属氧化物和碳源产生亚微米金属碳化物和亚微米固体金属碳化物的方法涉及快速加热源和碳的反应性颗粒混合物，以获得所得到的颗粒尺寸小于1微米。快速加热可能产生成品或前体。如果制备前体，则可以将其与另外的碳混合并进行第二快速加热步骤以制备成品。亚微米尺寸的金属碳化物和固溶金属碳化物适用于商业陶瓷应用。较小尺寸的颗粒产生具有优异韧性和硬度的产品。

6. 发明申请

WO1993014027A2 PROCESS FOR PREPARING ULTRAFINE ALUMINUM NITRIDE POWDER 审中-公开
标题翻译：制备超细氮化铝粉末的方法
公开(公告)号：WO1993014027A2
公开(公告)日：1993-07-22
申请号：PCT/US1992010574
申请日：1992-12-09
申请人： THE DOW CHEMICAL COMPANY
发明人： THE DOW CHEMICAL COMPANY , WEIMER, Alan, W. , COCHRAN, Gene, A. , HENLEY, John, P. , EISMAN, Glenn, A.
IPC分类号： C01B21/072
CPC分类号： C01B21/0728 , C01B21/06 , C01B21/0617 , C01B21/064 , C01B21/068 , C01B21/0722 , C01B21/0726 , C01B21/076 , C01P2006/12
摘要： Rapidly heat powdered aluminum, an admixture of powdered aluminum and a compatible solid material, a powdered admixture of alumina and carbon, or aluminum nitride powder having a surface area lower than desired in the presence of a source of nitrogen at a temperature of 2473 to 3073 K to produce aluminum nitride, then promptly quench the aluminum nitride product. The product has a surface area of greater than 10 m2/g, preferably greater than 15 m¿2?/g.
摘要翻译：快速加热铝粉，铝粉和相容固体材料的混合物，氧化铝和碳粉或氮化铝粉的混合物，其表面积低于在氮源存在下在2473至3073K之间的温度下进行以产生氮化铝，并快速冷却氮化铝。该产品的表面积大于10m 2 / g，优选大于15m 2 / g。

7. 发明授权

EP0620803B1 PROCESS FOR PREPARING ULTRAFINE ALUMINUM NITRIDE POWDER 失效
标题翻译：用于生产氮化铝
公开(公告)号：EP0620803B1
公开(公告)日：1999-03-03
申请号：EP93901411.4
申请日：1992-12-09
申请人： THE DOW CHEMICAL COMPANY
发明人： WEIMER, Alan, W. , COCHRAN, Gene, A. , HENLEY, John, P. , EISMAN, Glenn, A.
IPC分类号： C01B21/072
CPC分类号： C01B21/0728 , C01B21/06 , C01B21/0617 , C01B21/064 , C01B21/068 , C01B21/0722 , C01B21/0726 , C01B21/076 , C01P2006/12

8. 发明公开

EP0850195A1 METHOD TO PRODUCE A TRANSITION METAL CARBIDE FROM A PARTIALLY REDUCED TRANSITION METAL COMPOUND 失效
标题翻译：用于生产过渡金属碳化物STARTING FROM部分还原的过渡金属化合物
公开(公告)号：EP0850195A1
公开(公告)日：1998-07-01
申请号：EP96929958.0
申请日：1996-09-10
申请人： THE DOW CHEMICAL COMPANY
发明人： DUNMEAD, Steven, D. , NILSEN, Kevin, J. , LASHER, Gabrielle, R. , REPMAN, Joseph, F. , BARKER, Hobart, A. , WEIMER, Alan, W.
IPC分类号： C01B31
CPC分类号： C01B32/949 , C01B32/914 , C01P2002/72 , C01P2004/62 , C01P2006/11 , C01P2006/12 , C01P2006/80
摘要： A transition metal carbide is formed from a precursor mixture comprising at least one of the group consisting of: a transition metal, a transition metal carbide and a transition metal oxide. The precursor mixture may contain the desired transition metal carbide (for example, WC), but if the desired transition metal carbide is present in the precursor mixture, there is necessarily a significant amount of another compound such as a transition metal oxide, undesired carbide (for example, W2C) or transition metal. The method involves forming an admixture by mixing the precursor mixture with a sufficient amount of carbon to carburize the precursor mixture to the transition metal carbide and reacting the admixture in an inert or reducing atmosphere at a temperature for a time sufficient to convert the admixture to the transition metal carbide, wherein the admixture is reacted in the presence of a means to enhance transfer of heat into the admixture, an inert or reducing gas flowing through at least a portion of the admixture or combination thereof.

9. 发明公开

EP0755367A1 SILICON NITRIDE/SILICON CARBIDE COMPOSITE POWDERS, THEIR PREPARATION AND DENSIFIED MATERIALS PREPARED USING THE COMPOSITE POWDERS 失效
标题翻译：氮化硅/复合粉末，生产和使用复合粉末生产材料COMPRESSED
公开(公告)号：EP0755367A1
公开(公告)日：1997-01-29
申请号：EP95916972.0
申请日：1995-04-14
申请人： THE DOW CHEMICAL COMPANY
发明人： DUNMEAD, Stephen, D. , WEIMER, Alan, W. , CARROLL, Daniel, F. , EISMAN, Glenn, A. , COCHRAN, Gene, A. , SUSNITZKY, David, W. , BEAMAN, Donald, R. , NILSEN, Kevin, J.
IPC分类号： C04B35 , C01B21
CPC分类号： B82Y30/00 , C01B21/0685 , C01P2004/62 , C01P2004/64 , C01P2006/10 , C01P2006/12 , C04B35/584 , C04B35/593
摘要： Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.

10. 发明公开

EP0453516A1 PROCESS FOR PREPARING SILICON CARBIDE 失效
标题翻译：方法制备碳化硅的。
公开(公告)号：EP0453516A1
公开(公告)日：1991-10-30
申请号：EP90903075.0
申请日：1990-01-11
申请人： THE DOW CHEMICAL COMPANY
发明人： WEIMER, Alan, W. , MOORE, William, G. , RAFANIELLO, William , ROACH, Raymond P.
IPC分类号： C01B , B01J8 , C01B31
CPC分类号： B82Y30/00 , B01J8/0095 , B01J8/12 , C01B32/956 , C01P2004/51 , C01P2004/61 , C01P2004/62 , C01P2004/64 , C01P2006/12 , C01P2006/80
摘要： Un procédé de préparation de carbure de silicium par réduction carbothermique consiste à chauffer rapidement un mélange particulaire réactif d'une source de silice et d'une source de carbone afin de former un produit présentant une uniformité améliorée de la taille des cristaux. On peut utiliser le produit de ce procédé pour former une pièce densifiée. Ledit procédé consiste à faire passer un mélange particulaire réactif (24) d'une source de silice et d'une source de carbone dans un réacteur comportant (a) un élément (6) de transport de réactif, ledit élément de transport de réactif présentant une paroi définissant un conduit creux, la paroi étant dotée d'un moyen de refroidissement et étant en outre caractérisée en ce qu'elle comporte une paroi intérieure concentrique définissant un espace annulaire intérieur (20), ce dernier comprenant une admission et étant ouvert au niveau de sa partie inférieure de sorte que du gaz peut s'y écouler; (b) une chambre de réacteur (16), présentant une paroi (26) et définissant une zone de réaction (28), ladite chambre étant en liaison fluidique avec ledit élément de transport de réactif; (c) un moyen de chauffage (40) adapté pour chauffer le mélange particulaire réactif dans ladite zone de réaction; et (d) une chambre de refroidissement (42) présentant une paroi (48) définissant une zone de refroidissement (44), ladite paroi étant dotée d'un moyen de refroidissement, et ladite chambre de refroidissement étant en liaison fluidique avec la chambre du réacteur. On peut régler indépendamment les températures de l'élément de transport de réactif, de la chambre du réacteur et de la chambre de refroidissement, de sorte que l'on peut acheminer en continu le mélange particulaire réactif par l'intermédiaire dudit élément de transport de réactif jusque dans la zone du réacteur puis dans ladite zone de refroidissement.

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