Numerical study of three-dimensional convection due to buoyancy force in an aluminum oxide melt for Kyropoulos growth

Y. G. Son; J.H. Ryu; W. J. Lee; Y. C. Lee; H. H. Jo; 박용호

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자료유형: 학술저널

저자정보: Y. G. Son (부산대학교) J.H. Ryu (부산대학교) W. J. Lee (Empa Swiss Federal Laboratories for Materials Science and Technology) Y. C. Lee (한국생산기술연구원) H. H. Jo (한국생산기술연구원) 박용호 (부산대학교)

저널정보: 한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제16권 제1호

발행연도: 2015.2

수록면: 68 - 73 (6page)

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Sapphire single crystals are used widely in a number of modern high-tech applications, such as a substrate material for the epitaxial deposition, optical window material and a filter material for thermal neutron beams. In particular, sapphire single crystals have been highlighted for epitaxial gallium nitride films in high-power laser and light emitting diode (LED) industries. Among the many crystal growth methods, the Kyropoulos process is an excellent commercial method for growing larger, highoptical-quality sapphire crystals with fewer defects. Because the properties and growth behavior of sapphire crystals are influenced largely by the temperature distribution and convection of molten sapphire during the manufacturing process, accurate predictions of the thermal fields and melt flow behavior are essential to design and optimize the Kyropoulos crystal growth process. In this study, computational fluid dynamic simulations were performed to examine the effects of the thermal conditions and geometry on melt convection during Kyropoulos sapphire crystal growth. The evolution of various growth parameters on the temperature, pressure, and velocity profiles were examined using three-dimensional, quantitative, finite volume element-based simulations.

#Computer simulation #Convection #Radiation #Single crystal growth #Kyropoulos method #Sapphire

참고문헌 (14)

참고문헌 신청

A. Wang / 2002 / Single- Crystal Sapphire Optical Fiber Sensor Instrumentation

Daniel C. Harris / 2004 / A Century of Sapphire Crystal Growth / Proceedings of the 10th DoD Electromagnetic Windows Symposium

Chandra P. Khattak / 2001 / Growth of the world’s largest sapphire crystals / Journal of Crystal Growth 225:572~579

S. E. Demina / 2007 / Numerical analysis of sapphire crystal growth by the Kyropoulos technique / Optical Materials 30:62~65

Chung-Wei Lu / 2010 / Effects of RF coil position on the transport processes during the stages of sapphire Czochralski crystal growth / Journal of Crystal Growth 312:1074~1079

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