Modeling of ellipsoid mirror furnace for floating-zone crystal growth

NCUIR > Engineering College > National Central University Department of Chemical & Materials Engineering > journal & Dissertation > Item 987654321/26561

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26561

Title:	Modeling of ellipsoid mirror furnace for floating-zone crystal growth
Authors:	Lan,CW;Tsai,CH
Contributors:	化學工程與材料工程學系
Keywords:	MICROGRAVITY;GRAVITY
Date:	1997
Issue Date:	2010-06-29 17:31:07 (UTC+8)
Publisher:	中央大學
Abstract:	Because of its compactness and high efficiency, the image furnace using ellipsoid mirrors to focus infrared heating from lamps has widely been used in floating-zone (FZ) crystal growth. However, little research has been reported on modeling energy distribution in such a system. In this paper, a simple model considering direct and indirect radiation from the lamps is presented. This model is consistent with the point-source model as the lamp size is diminished. The effects of lamp size, shape, orientation, and defocusing are discussed. The model is further integrated with a three-dimensional thermal-capillary model. Therefore, the temperature distribution and the zone shape of the sample during FZ growth in the furnace can be estimated. Temperature measurements of a graphite rod in a mirror furnace were also conducted to validate the global model.
Relation:	JOURNAL OF CRYSTAL GROWTH
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

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