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摘要: 在4.5~5.0 GPa,1 500~1 800 ℃范围内,在Li基复合氮硼化物的催化体系中添加Li8SiN4后,得到了具有光泽的棕色透明的cBN单晶。研究了cBN晶体的形貌,结果表明,添加Li8SiN4后得到的等积形cBN晶体的百分比明显增多,除部分截角四面体外,多为截角八面体晶体,且棱角尖锐,晶面致密光滑。Abstract: After adding Li8SiN4 into the catalytic system of Li-complex borom nitrides, the glossy transparent cBN brown crystals were synthesized under the conditions of high pressure and high temperature in the range 4.5~5.0 GPa and 1 500~1 800 ℃ respectively. The morphology of cBN crystals is studied. The result shows that the percentage of blocky cBN crystals synthesized with Li8SiN4 increases obviously, and except the partial tuncated tetragonal crystals, the most of them are tuncated octahedral crystals. The edges and corners of cBN crystals are accurate and sharp, and surfaces of them are dense and smooth.
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Key words:
- Li8SiN4 /
- cBN /
- morphology /
- crystal
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