期刊
JOURNAL OF CRYSTAL GROWTH
卷 311, 期 12, 页码 3257-3264出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2009.03.031
关键词
Phase equilibria; Solid solutions; Bridgman technique; Semiconducting lead compounds
资金
- Russian foundation of basic researches (RFBR)
The application of T-x-y phase diagram for the control of the crystal composition of alloy crystals during Bridgman growth is illustrated using(Pb1-xSnx)(1-delta)Se1+delta solid solutions as an example. Within the framework of the proposed approach, the axial segregation can be minimised if the feed composition is chosen in the regions of phase diagram where the iso-mole-fraction lines are perpendicular to isotherms. For the system Pb-Sn-Se the component distribution in crystals grown from a melt with (delta=0, a Se-rich melt(delta>0) and a metal-rich melt (delta<0) are discussed. Uniform crystals with x=(0.03-0.15) +/- 0.01 can be obtained from Se-rich melt (Se enrichment is 12-5at%Se, T=1280-1200K). The use of metal-rich melt allows obtaining crystals with moderate segregation of 3-5 mol% SnSe for x=0.13-0.23 at 3-9at% of metal enrichment and T-1270-1200K and for x=0.35-0.45 at 25-35at% of metal enrichment and T=1120-1050K. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据