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    • 3. 发明授权
    • Hot filament method for growing high purity diamond
    • 用于生产高纯金刚石的热熔方法
    • US5209812A
    • 1993-05-11
    • US506633
    • 1990-04-09
    • Ching-Hsong WuMichael A. TamorTimothy J. Potter
    • Ching-Hsong WuMichael A. TamorTimothy J. Potter
    • C23C16/27
    • C23C16/271
    • A method of growing high purity diamond crystallite structures at relatively high growth rates on a temperature resistant substrate, comprising (a) flowing diamond producing feed gases at low pressure through a reaction chamber containing the substrate, the feed gases being comprised of hydrocarbon devoid of methyl group gases, i.e., acetylene or ethylene, diluted by hydrogen, and (b) while concurrently raising the temperature of the substrate to the temperature range of 600.degree.-1000.degree. C., thermally activating the feed gases by use of a hot filament located within the chamber and upstream and adjacent the substrate, the filament being heated to a temperature above 1900.degree. C., that is effective to generate a substantial atomic hydrogen (H) concentration and carbon containing free radicals. A substantial additional loss in carbon balance of the gases is triggered at a lower filament temperature indicative of the formation of intermediate substances that stimulate diamond growth. The gases may be mixed prior to passing the filament and may include CO or equivalent gases to enhance diamond purity. Alternatively, the gases are delivered in a substantially nonmixed condition past said filament and are substantially mixed for the first time at the surface of the substrate.
    • 8. 发明授权
    • Process for treatment of exhaust gases
    • 废气处理工艺
    • US4448756A
    • 1984-05-15
    • US461819
    • 1983-01-28
    • Robert H. HammerleChing-Hsong Wu
    • Robert H. HammerleChing-Hsong Wu
    • B01D53/94B01J23/42B01D53/36B01J23/44B01J23/46
    • B01D53/945Y02T10/22
    • This specification discloses a process for treatment of exhaust gases from an internal combustion engine. The process has the following general steps. A hydrocarbon fuel is burned in an internal combustion engine to generate exhaust gases containing various amounts of hydrocarbons, carbon monoxide, and oxides of nitrogen. The generated exhaust gases are passed over an improved catalyst system characterized as follows. The catalyst system has a support medium for supporting the same. The support medium has both an upstream support portion over which exhaust gases initially flow and a downstream support portion over which exhaust gases flow after passing over the upstream support portion thereof. Finely divided palladium is dispersed by itself on the upstream support portion of the support medium. The downstream support portion of the support medium has a platinum/rhodium three-way catalyst thereon.
    • 本说明书公开了一种处理来自内燃机的废气的方法。 该过程具有以下一般步骤。 烃燃料在内燃机中燃烧以产生含有各种量的烃,一氧化碳和氮氧化物的废气。 产生的废气通过改进的催化剂体系,其特征如下。 该催化剂体系具有用于支撑该催化剂体系的载体介质。 支撑介质具有上游支撑部分,废气首先流过该上游支撑部分和下游支撑部分,排气在通过其上游支撑部分之后流过该支撑部分。 细分的钯本身分散在载体介质的上游支持部分上。 载体介质的下游支持部分在其上具有铂/铑三元催化剂。