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    • 7. 发明公开
    • Production of ultrastructural ceramics
    • Herstellung von Keramiken mit einer Ultrastruktur。
    • EP0357176A2
    • 1990-03-07
    • EP89304258.0
    • 1989-04-27
    • Sullivan, Thomas Milton
    • Sullivan, Thomas Milton
    • C04B35/58C04B35/56C04B35/64D01F9/10
    • C04B35/65C04B35/571C04B35/58C04B35/58014C04B35/58028C04B35/58042C04B35/589C04B35/591C04B35/62295C04B35/645Y10S264/11
    • A process for the production of high-performance ceramics and ceramic precursors is disclosed which comprises reacting an organometallic precursor with a reactant in a supercritical fluid and exposing the organometallic prod­uct to a ceramic material. A critical temperature (or pressure) is required to produce the supercritical fluid which is the maximum temperature (or pressure) at which a gas or vapor may be liquified by the application of a critical pressure (or temperature).
      Nitrogen-containing ceramics such as nitrides, oxynitrides and carbonnitrides, and carbide ceramics are produced by reacting precursors such as alkyl halosilanes and dialkyl silanes in the presence of a supercritical fluid such as nitrogen, hydrogen, ammonia and mixtures thereof for the nitrogen-containing ceramics and in the presence of hydrocarbons, hydrogen or mixtures thereof for the carbide ceramics. The high performance ceramics produced find particular application in the automobile industry.
    • 公开了一种用于生产高性能陶瓷和陶瓷前体的方法,其包括使有机金属前体与超临界流体中的反应物反应并将有机金属产物暴露于陶瓷材料。 需要临界温度(或压力)以产生超临界流体,超临界流体是通过施加临界压力(或温度)使气体或蒸汽液化的最高温度(或压力)。 通过使诸如烷基卤代硅烷和二烷基硅烷的前体在氮,氢,氨等超临界流体及其混合物的存在下使含氮陶瓷反应,制备氮化物,氮氧化物和碳氮化物等含氮陶瓷,以及碳化物陶瓷。 并且在碳氢化合物,氢气或其混合物的存在下,用于碳化物陶瓷。 制造的高性能陶瓷在汽车工业中得到了应用。