通过对温场的数值模拟计算,发现外加轴向、径向温度梯度能够提高界面稳定性,减小熔体热对流,有利提高晶体的生长质量。根据大尺寸蓝宝石晶体生长的温场要求,对常规的GOI法晶体生长炉进行了改造,并设计了独特的加热体形状和隔热屏结构,能够为晶体生长系统提供可控的轴向、径向温度梯度。通过试验比较也证明了改造温场后的单晶炉能够生长出性能较好的大尺寸蓝宝石晶体。
Abstract
With the help of numerical simulation on temperature field,we get the result that additional axial and radial temperature gradient can increase the stability of interface,decrease thermal convection of fused mass and improve the quality of crystal growth.According to the temperature field requirement for growing large size sapphire,the conventional GOI furnace was modified with designing special shape of heater and structure of heat shield.It can provide controllable axial and radial temperature gradient for the system of crystal growth.It is indicated that the improved temperature field furnace could grow better quality large size sapphire.
关键词
温场优化 /
数值模拟 /
蓝宝石 /
GOI法
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Key words
optimization of temp /
numerical simulation /
sapphire /
GOI method
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参考文献
何立萍,成楚之,徐品高.超高速导弹毫米波/红外复合导引头研究[J].红外与激光工程,1996,25(4)56-64.
李玉民,李瑾.红外光学材料及整流罩技术的新进展[J].红外与激光技术,1995,24(5):1-6.
黄存新,李建保,雷牧云,等.中波红外光学材料的研究现状和发展趋势[J].人工晶体学报,2003,32(3):276-281.
聂辉,陆炳哲.蓝宝石及其在军用光电设备上的应用[J].舰船电子工程.2005,25(2):131-133.
张义广,丁明跃,周成平.弹道导弹红外成像制导的关键技术[J].华中科技大学学报(自然科学版).2004,32(4):105-107.
KYROPOULS S,ANORG Z.Chem[J].1926,154:308-314.
韩杰才,左洪波,孟松鹤,等.泡生法制备大尺寸蓝宝石单晶体[J].人工晶体学报,2005,34(1):101-102.
赵镇南.传热学[M].北京:高等教育出版社,2002.7.
王兴安,梅飞鸣.辐射传热[M].北京:高等教育出版社,1989.11.
NICOARA I,NICOARA D,VIZMAN D.Heat transfer analysis and structure perfection of shaped semi-transparent crystals[J].Journal of Crystal Growth.1993,128:152-158.
YUFEREV V S,VASILEV M G..Heat transfer in shaped thinvalled semi-transparent crystals pulled from the melt[J].Journal of Crystal Growth.1987,82:31-38.
BRANDON S,GAZIT D,HOROWITZ A.Modeling of crystal growth process in during the gradient solidification method growth of sapphire single crystals[J].Journal of Crystal Growth,1983,169:147-152.
HARRIS D C.Material for Infrared Window and Dome-Properties and Performance[C].SPIE.1999.
曹余惠.热辐射透过百分数对界面形状的影响[J].人工晶体学报,1996,25(4):286-290.
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