Growth of benzil crystals by vertical dynamic gradient freeze technique in a transparent furnace

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26553

Title:	Growth of benzil crystals by vertical dynamic gradient freeze technique in a transparent furnace
Authors:	Lan,CW;Song,CR
Contributors:	化學工程與材料工程學系
Keywords:	OPTICAL ORGANIC MATERIALS;CZOCHRALSKI;SYSTEM
Date:	1997
Issue Date:	2010-06-29 17:30:55 (UTC+8)
Publisher:	中央大學
Abstract:	The vertical dynamic gradient freeze technique using a transparent furnace was applied to the growth of benzil single crystals. A flat-bottom ampoule with a [0001] seed was used for growth. During crystal growth, dynamic heating profiles were controlled through a computer, and the growth interface was recorded by a CCD camera. Computer simulation was also conducted, and the calculated convex interface and dynamic growth rate were consistent with the observed ones for various growth conditions. Conditions for growing single crystals were also determined, and they were mainly limited by constitutional supercooling. As the grown crystals were clear in appearance, their optical absorption spectra were insensitive to growth conditions and post-annealing.
Relation:	JOURNAL OF CRYSTAL GROWTH
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

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