Abstract: The radial temperature difference at the bottom of crucible is determined by the bottom shield structure. The morphology of crystal tailing growth is determined by the radial temperature difference at the bottom of crucible. The suitable radial temperature difference at the bottom of crucible can ensure good crystal tail growth and inhibit interface inversion. CFD software was used to simulate the effects of different bottom shield structure on the crystal power, the radial temperature difference at the bottom of crucible and the convexity. The results show that the smallest crystal power, the largest radial temperature difference at the bottom and the largest convexity can be obtained by using the splitting bottom shield structure whenever the shouldering and the tailing stage. According to the optimized results, the splitting bottom shield structure was used to carry out the experiment of crystal growth. The bottom surface of the crystal showed annual rings and the crystal quality was good.
于海群. 底部保温结构对大尺寸蓝宝石晶体生长影响的数值模拟及实验研究[J]. 材料导报, 2019, 33(z1): 37-40.
YU Haiqun. Simulation and Experimental Research on the Effect of Bottom Shield Structure on the Large-size Sapphire Crystal Growth. Materials Reports, 2019, 33(z1): 37-40.