Reliable High Pressure Technique for Material Synthesis.

本课题的研究历时两年，分别为1992年和1993年。成都科技大学(CUST)设计的立方砧式高压高温装置已成功应用于筑波大学(TU)设计和安装的立方砧式高压高温装置。在保证围压的机械稳定性(避免“井喷”事故)方面是有效的，但需要对设计进行改进，使压力效率略有提高。设计和生产的压力介质比传统的TU使用的压力介质更好，压力和温度的稳定性得到了改善，因为不需要的热转变较少。CUST装置与TU设计和提供的压力和加热功率控制单元相结合，在压力和温度方面的稳定性和重复性得到了极大的提高。CUST装置已成功地用于在小超压下从石墨碳源中生长金刚石种子晶体的实验。这种生长过程需要一个非常稳定的压力来长期生长。这些结果表明，两所大学的实验能力都有所提高，并根据两种仪器的合作特性，期待着更精细的实验的进一步发展。

Researches in this subject were performed for two years, 1992 and 1993. Cubic anvils designed in Chengdu University of Science and Technology (CUST) were applied successfully to the cubic anvil-type high pressure-high temperature apparatus designed and installed in University of Tsukuba (TU). The CUST-type anvils are effective in the mechanical stability of confining pressure (avoiding the "blowout" accident), though with a need for improvement of the design to raise the pressure efficiency a little. The pressure medium designed and produced in CUST was better than that used in TU conventionally, in showing improved stability of pressure and temperature because of having less thermal transformation undesirable.The apparatus of CUST, applied with pressure and heating power controlling units designed and supplied by TU, showed a very improved stability and reproducibility in pressures and temperatures. The CUST apparatus was manifested to be used successfully in experiments of growing seed crystals of diamond from a carbon source of graphite at a small excess pressure. This growth process requires a very stable pressure for a long growth term.Those results show improvement in experimental ability of the both universities and make one expect further development of finer experiments based on the co-operative characters of the both-type apparatuses.