基于有限元法分析宝石级金刚石的合成腔体温度场  

Finite element method study on the temperature distribution in the cell of large single crystal diamond

作　　者：韩奇钢[1] 马红安[1] 肖宏宇[1] 李瑞[2] 张聪[1] 李战厂[1] 田宇[1] 贾晓鹏[1] 

机构地区：[1]吉林大学超硬材料国家重点实验室,长春130012 [2]长春理工大学材料科学与工程学院,长春130012

出　　处：《物理学报》2010年第3期1923-1927,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50572032;50731006;50801030)资助的课题~~

摘　　要：以有限元法为理论分析手段模拟分析了温度梯度法合成宝石级金刚石大单晶的腔体温度场,实现了对宝石级金刚石的合成腔体内各位置温度同时测量.模拟结果表明:在宝石级金刚石合成过程中,其温度分布呈不均匀分布.腔体内高温区分布在样品(碳源+触媒)边缘,低温区分布在籽晶附近.样品腔内热量的传递方式和样品腔内的碳源输运方式相同,均由碳源的两侧向籽晶附近传输.籽晶附近轴向温度梯度大于径向温度梯度,导致单位时间内其轴向生长尺寸大于径向生长尺寸.宝石级金刚石腔体温度场分析的理论模型的成功构建,为新型宝石级金刚石腔体的研制提供了良好的设计基础,对促进优质宝石级金刚石的生长技术具有指导意义.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.

关 键 词：合成腔体 温度场 宝石级金刚石 有限元法 

分 类 号：TQ164[化学工程—高温制品工业]