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

Zhang Cong Han Qi-Gang Ma Hong-An Xiao Hong-Yu Li Rui Li Zhan-Chang Tian Yu Jia Xiao-Peng

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

Zhang Cong, Han Qi-Gang, Ma Hong-An, Xiao Hong-Yu, Li Rui, Li Zhan-Chang, Tian Yu, Jia Xiao-Peng
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  • Received Date:  13 October 2009
  • Accepted Date:  26 October 2009
  • Published Online:  15 March 2010

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

  • 1. (1)长春理工大学材料科学与工程学院,长春 130012; (2)吉林大学超硬材料国家重点实验室,长春 130012

Abstract: 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.

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