In this work, we use a multi-seed arrangement assembly with an annular carbon source to synthesize large single-crystals of diamond and investigate the influence of the external environment on the synthesis of diamonds by adjusting the lateral cooling water temperature under high pressure and high temperature conditions. The finite element method (FEM) is used to simulate the temperature and convection fields of the synthetic cavity. The simulation results show that the radial temperature distribution of the catalyst is uniform. In addition, the distribution of the convection field of the employed catalyst is also asymmetric. The asymmetric distribution of the temperature field and convection field could lead to the asymmetric consumption of carbon sources, and then lead to the asymmetric growth of the diamond crystals. Diamond synthesis experimental results proved the correctness of our simulation results.

中文翻译：

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通过调节侧向冷却水温度来显着改进金刚石合成的多种子方法

在这项工作中，我们使用具有环形碳源的多种子排列组件来合成大型金刚石单晶，并通过在高压和高压下调节侧向冷却水温度来研究外部环境对金刚石合成的影响。温度条件。有限元方法（FEM）用于模拟合成腔的温度和对流场。仿真结果表明，催化剂的径向温度分布是均匀的。另外，所用催化剂的对流场的分布也是不对称的。温度场和对流场的不对称分布可能导致碳源的不对称消耗，进而导致金刚石晶体的不对称生长。