人造金刚石用触媒形状的新构想

 六面顶和两面顶高压装置都采用圆片状触媒。在同腔体的情况下，后者的单次产量比前者约高50%。介绍了触媒的表面性质和合成件加载过程的外力与变形的关系，并对触媒形状的变化关系与比表面问题作了评述。指出，增加石墨和触媒接触的比表面或反应面积，对于提高细颗粒单晶金刚石的转化率是一条重要途径。为此，提出一种新形状触媒——泡沫触媒的构想。

A NEW CONCEPT ON THE STRUCTURE OF THE CATALYST IN DIAMOND SYNTHESIS

The circular sheet catalyst has been found useful for both six anvil and two anvil high pressure devices. But the singe-output of the latter is about 50% higher than the former for the same chamber dimentions. In this paper, we analysed the catalyst's surface characteristic and the relationship between the applied load and the strain of the catalyst assembly evaluated the ruction in the variation of the specific surface area as well as the shape of the catalyst. We conclude that the increase in contact area, or reaction area, between the catalyst and graphite is important for the enhancement of convertion ratio of single-crystal fine diamond. To this end, the new concept of foam catalyst has been presented.