Synthesis of high quality type-Ib diamond crystals in carats grade

作     者：XIAO HongYu JIA XiaoPeng MA HongAn LI ShangSheng LI Yong ZHAO Ming 

作者机构：State Key Laboratory of Superhard Materials Jilin University Changchun 130012 China 

出 版 物：《Chinese Science Bulletin》 (Chinese Science Bulletin)

年 卷 期：2010年第55卷第14期

页      面：1372-1375页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 50572032 and 50731006) 

主　　题：宝石级金刚石 单晶合成 克拉 金刚石晶体 质型 经济增长 生长温度 钻石首饰 

摘      要：High quality type-Ib tower-shape gem-diamond crystals in carats grade were synthesized in cubic anvil high pressure apparatus (SPD-6×1200) at 5.4 GPa and 1250-1450°C. The relationship between the growth time and the weight of growth diamond has been gained. The faces of {110} and {113} were found in the synthetic diamond crystals frequently. We found that the relative growth rate of {113} face was descending with the increase of growth temperature, and that of {110} face had no obvious change with the increase of the growth temperatures and the growth time. In the work, the crystal defects were studied carefully, and the reasons for the appearance of the defects were also obtained. Some diamond crystals have been polished into the anvil of DAC (Diamond Anvil Cell) and the diamond jewelry. Compared with natural diamond crystal, synthetic diamond crystal has the merits such as small grinding quantity, low cost, etc., so it can be widely used in super high pressure field and gemstone industry.