NDLI: Dependence of Radiation Effects on System Configuration and Physical Properties in Bridgman Growth of Optical Crystals

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ma, Y. Zheng, L. L.
Copyright Year	2004
Abstract	Optical crystals, such as YAG, GGG, sapphire, CaF2, are of high melting temperature. As a result, the radiative heat transfer during the crystal growth process is an important factor to influence the temperature distribution and hence the quality of as-grown crystals. However, the radiation effect is complicated in the optical crystal growth system. It depends on the system geometry and properties, such as the spectral transmittance of the oxide crystals, and the emissivity of the ampoule and the furnace inner wall. In this paper, the analysis of heat transfer coupled with radiation effect has been carried out using one-dimensional thermal resistance network method for optical crystals growth. The results show that radiation plays a significant role in the heat transfer and temperature distribution during growth, and the subsequent quality of the grown crystal. Two-dimensional numerical simulations have also been conducted and the simulation results have been compared with the one-dimensional results. Effects of system configuration and physical properties on crystal quality are also analyzed and discussed.
Sponsorship	Heat Transfer Division
Starting Page	437
Ending Page	445
Page Count	9
File Format	PDF
ISBN	079184711X
DOI	10.1115/IMECE2004-59907
Volume Number	Heat Transfer, Volume 3
Conference Proceedings	ASME 2004 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2004-11-13
Publisher Place	Anaheim, California, USA
Access Restriction	Subscribed
Subject Keyword	Crystal growth Radiation effects Temperature distribution Temperature Melting Computer simulation Crystals Geometry Emissivity Simulation results Furnaces Radiation (physics) Thermal resistance Sapphire Heat transfer Radiative heat transfer
Content Type	Text
Resource Type	Article

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