Finite element method study on the temperature distribution in the cell of large single crystal diamond
Finite element method study on the temperature distribution in the cell of large single crystal diamond
复制标题
大型单晶金刚石晶胞内温度分布的有限元法研究
DOI：
10.7498/aps.59.1923
复制
发表时间：
2010-03
期刊：
影响因子：
--
通讯作者：
中科院分区：
文献类型：
--
作者：
基于有限元方法，研究了温度梯度法生长的单晶金刚石晶胞内的温度分布。我们的结果表明单晶金刚石合成过程中的温度分布不均匀。电池中的最高温度位于单碳溶剂的外部，电池中的最低温度位于金刚石晶种附近。传热和传质具有相同的方向（从碳源外部到金刚石晶种）。轴向温度梯度高于径向，这解释了为什么人造单晶金刚石轴向尺寸大于径向尺寸。该模型将有助于设计通过温度梯度法生长的单晶金刚石。此外，这项工作有望改进用于合成高质量金刚石晶体的立方砧型高压技术。
The temperature distribution in the cell of single crystal diamond grown by the temperature gradient method has been studied, which is based on the finite element method. Our results shwo that the temperature distribution in the synthetic process of single crystal diamond is not uniform. The highest temperature in the cell is located at the outside of single carbon solvent, and the lowest temperature in the cell is located near the diamond seed. The heat transfer and the mass transport have a same direction （from outside of carbon source to diamond seed）. The temperature gradient in the axial direction is higher than that in the radial direction, which explains why the size of synthetic single crystal diamond in the axial direction is larger than that in the radial direction. The model will be useful for the design of single crystal diamond grown by the temperature gradient method. Furthermore, this work will be hopeful to improve the cubic anvil type high pressure techniques for the synthesis of high quality diamond crystals.