利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.026 秒)

    Method for producing uniform, fine boron-containing ceramic powders
    2.
    发明授权
    Method for producing uniform, fine boron-containing ceramic powders 失效
    制备均匀，细微的含硼陶瓷粉末的方法

    公开(公告)号：US5194234A

    公开(公告)日：1993-03-16

    申请号：US758029

    申请日：1991-09-12

    申请人： Alan W. Weimer ,  William G. Moore ,  Raymond P. Roach

    发明人： Alan W. Weimer ,  William G. Moore ,  Raymond P. Roach

    IPC分类号： B01J8/00 ,  B01J8/12 ,  C01B21/064 ,  C01B31/30 ,  C01B31/36 ,  C01B35/04 ,  C04B35/563

    CPC分类号： B82Y30/00 ,  B01J8/0095 ,  B01J8/12 ,  C01B21/0645 ,  C01B31/301 ,  C01B31/36 ,  C01B35/04 ,  C04B35/563 ,  B01J2208/00495 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/52 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2006/12 ,  C01P2006/80 ,  C01P2006/90

    摘要： Uniform, fine ceramic powder is prepared using an apparatus comprising (a) a cooled reactant transport member; (b) a reactor chamber; (c) a heating means; and (d) a cooling chamber. The reactant transport member comprises a wall defining a conduit that communicates with the reactor chamber, with a gas-flow space being defined along the perimeter of the transport member and in communication with the reactor chamber. The reactor chamber comprises a wall defining a reaction zone, and the heating means is associated with the reaction zone, and adapted for heating reactants in the reaction zone. The cooling chamber comprises a wall defining a cooling zone that communicates with the reactor chamber. In one embodiment the communication is by means of a cooling inlet, the diameter of the cooling zone being larger than the diameter of the cooling inlet. The temperatures of the reactant transport member, the reactor chamber, and the cooling chamber are independently controllable. Reactants can be fed through the reactant transport member into the reaction zone and reacted to form products, and the products then fed into the cooling zone to produce uniform, fine ceramic powders.

    摘要翻译： 使用包含（a）冷却的反应物输送构件的装置制备均匀的细陶瓷粉末; （b）反应室; （c）加热装置; 和（d）冷却室。 反应物输送构件包括限定与反应器室连通的管道的壁，其中气流空间沿着输送构件的周边限定并与反应器室连通。 反应器室包括限定反应区的壁，并且加热装置与反应区相关联，并且适于加热反应区中的反应物。 冷却室包括限定与反应器室连通的冷却区的壁。 在一个实施例中，通信通过冷却入口，冷却区的直径大于冷却入口的直径。 反应物输送构件，反应器室和冷却室的温度是独立可控的。 反应物可以通过反应物输送构件进料到反应区中并反应以形成产物，然后将产物进料到冷却区中以产生均匀的精细陶瓷粉末。

    High yield manufacturing process for silicon carbide
    4.
    发明授权
    High yield manufacturing process for silicon carbide 失效
    高产量的碳化硅制造工艺

    公开(公告)号：US5190737A

    公开(公告)日：1993-03-02

    申请号：US693507

    申请日：1991-04-30

    申请人： Alan W. Weimer ,  Raymond P. Roach ,  John P. Henley

    发明人： Alan W. Weimer ,  Raymond P. Roach ,  John P. Henley

    IPC分类号： B01J8/00 ,  B01J8/12 ,  C01B31/36

    CPC分类号： C01B31/36 ,  B01J8/0095 ,  B01J8/12 ,  B82Y30/00 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/80

    摘要： A process for preparing silicon carbide by carbothermal reduction which includes transporting, in a gaseous medium, a particulate reactive mixture of a silica source and a carbon source through a reaction zone. The heating rate of the atmosphere within the reaction zone is such that substantially all of the reactive mixture is heated at a heating rate of at least about 100.degree. C./second until an elevated temperature of at least 1800.degree. C. is reached. Either (1) carbon monoxide is added to the reaction zone or (2) a carbon monoxide level in the reaction is achieved in order to provide at least about 30 mole percent of the gases exiting the reaction zone to achieve a higher yield of silicon carbide.

    摘要翻译： 一种通过碳热还原制备碳化硅的方法，其包括在气态介质中通过反应区输送二氧化硅源和碳源的颗粒反应性混合物。 反应区内的气氛的加热速率使得基本上所有的反应混合物以至少约100℃/秒的加热速率被加热直到达到至少1800℃的升高的温度。 （1）将一氧化碳加入到反应区中，或（2）达到反应中的一氧化碳水平，以便提供离开反应区的至少约30摩尔％的气体以获得更高的碳化硅产率 。