Φ140 mm sapphire crystal growth by temperature gradient techniques and its color centers

被引：26

作者：

Zhou, GQ

Dong, YJ

Xu, J

Li, HJ

Si, JL

Qian, XB

Li, XQ

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

MATERIALS LETTERS | 2006年 / 60卷 / 07期

关键词：

sapphire; TGT; growth; color centers; crystals;

D O I：

10.1016/j.matlet.2005.10.092

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Sapphire crystals, 140 mm in diameter and 90 turn in height, have been grown by temperature gradient techniques (TGT). The growth direction of the boule was fixed by means of Lane X-ray diffraction. A prominent 204 nm absorption band in TGT-Al2O3. which does not appear in single crystals grown by Czochralski method has been studied. Analysis further substantiates the F-center model of this band. Two relatively weaker bands absorbing at 232 nm and 254 nm were ascribed to F+ centers. F-type centers concentration was determined using Smakula's equation. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：901 / 904

页数：4

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