RHOMBOHEDRAL POLYCRYSTALLINE BORON NITRIDE AND PROCESS FOR ITS PRODUCTION
    3.
    发明授权
    RHOMBOHEDRAL POLYCRYSTALLINE BORON NITRIDE AND PROCESS FOR ITS PRODUCTION 失效
    RHOMBOHEDRAL多结晶硼氮化硼及其生产工艺

    公开(公告)号:EP0216932B1

    公开(公告)日:1992-05-13

    申请号:EP86901511.5

    申请日:1986-02-27

    IPC分类号: C01B21/064 C23C16/34

    摘要: Highly pure, high-density rhombohedral polycrystalline boron nitride substantially comprising rhombohedral crystals and having a three-fold axis of symmetry (an axis parallel to axis c according to hexagonal representation) oriented to one direction, which can be obtained in an arbitrary mass or thin film form by a chemical vapor deposition process of introducing a boron source gas and a nitrogen source gas and, optionally, a diluting and carrier gas into a reactor provided with a heated base to deposit boron nitride on the base, while providing a nitrogen source gas- and/or a carrier gas-diffusing layer around the heated base. The resulting boron nitride is extremely useful as semiconductors, crucibles for melting, various high-temperature jigs, high-frequency insulators, microwave transmitting apertures, and boron source for semi-conductors and, in addition, optimal as a precursor of high-pressure phase cubic boron nitride.

    摘要翻译: 高纯度,高密度的菱形多晶氮化硼,其基本上包含菱形晶体并且具有朝向一个方向的三重对称轴(与六角形表示的轴c平行的轴),其可以以任意质量或薄 通过化学气相沉积工艺将硼源气体和氮源气体以及任选的稀释气体和载气引入具有加热基底的反应器中,以在基底上沉积氮化硼,同时提供氮源气体 - 和/或围绕加热基座的载气扩散层。 所得到的氮化硼作为半导体,熔化用坩埚,各种高温夹具,高频绝缘体,微波通过孔,半导体用硼源等非常有用,而且作为高压相 立方氮化硼。

    Ceramics composite article and method of making same
    6.
    发明公开
    Ceramics composite article and method of making same 失效
    陶瓷复合物品及其制造方法

    公开(公告)号:EP0377317A1

    公开(公告)日:1990-07-11

    申请号:EP89313562.4

    申请日:1989-12-22

    IPC分类号: C04B35/80

    CPC分类号: C04B35/584 C04B35/806

    摘要: A ceramics composite article of high strength and superior toughness, wherein whiskers are dispersed in its matrix and said dispersed whiskers are oriented parallel to the outer surface of the ceramics article and also in two-dimensionally random directions over the whole thickness from the outer surface to the inner surface of the ceramics article.
    The invention extends to a method of making such an article.

    摘要翻译: 一种高强度和高韧性的陶瓷复合材料制品,其中晶须分散在其基体中,并且所述分散的晶须取向平行于陶瓷制品的外表面,并且还在从外表面到整个厚度的二维随机方向上取向 陶瓷制品的内表面。 本发明延伸至制造这种制品的方法。