金红石单晶体制备方法发展现状

Current situation of the development of preparation method of rutile single crystal

金红石单晶体拥有较高的双折射率,在可见-红外波段透过性良好,因此,作为特殊介电材料、红外窗口材料、制作光隔离器的材料等,被广泛地应用于现代光学通讯领域。然而,高品质金红石单晶体的生长技术仍然是国际上的难题,相关基础研究理论匮乏。人们尝试过多种方法生长金红石单晶体,但目前比较成功的只有光浮区法和焰熔法。分析了光浮区法和焰熔法的优势和不足。由于焰熔法可制备较大尺寸的晶体,且焰熔法生长设备的技术进步,使其晶体质量得到提高,因此,作为商品应用的金红石晶体主要还是焰熔法制备。指出了使用数字精密控制技术、基于传热学和流体力学设计的焰熔法晶体生长技术是金红石单晶体制备的重要发展方向。

Rutile（TiO_2）single crystals possess a high birefringence and a high transmittance in the visible-infrared wavelengths.Therefore rutile（TiO_2）single crystals are widely used in the field of modern communication as a special dielectric material,infrared window material,optical isolator,etc.However,production of high quality rutile single crystals is still a difficult problem due to the lack of fundamental theoretical research.Many methods have been tried to grow rutile single crystal,however,the more successful ones are floating zone method and flame fusion method.This paper discusses the advantages and disadvantages of the two methods.Due to the large size of the crystals grew by flame fusion method and the technology progress of the equipment,the quality of crystal was improved,so it is the main method for commercial rutile single crystals.Using a digital precision control technology are pointed out based on heat transfer and fluid mechanics design of flame fusion method of crystal growth technology,and it is an important development direction of the preparation of rutile single crystal.