Boron removal by titanium addition in solidification refining of silicon with Si-Al melt

被引：96

作者：

Yoshikawa, T ^{[1
]}

Arimura, K

Morita, K

机构：

[1] Univ Tokyo, Dept Mat Engn, Tokyo 1138656, Japan

[2] Univ Tokyo, Dept Mat Engn, Tokyo 1008101, Japan

[3] Daiwa Securities Co Ltd, Tokyo 1008101, Japan

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2005年 / 36卷 / 06期

关键词：

D O I：

10.1007/s11663-005-0085-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to effectively remove B from Si for its use in solar cells, a process involving B removal by solidification refining of Si using a Si-Al melt with Ti addition was investigated. For clarifying the effect of Ti addition on B removal from the Si-Al melt, TiB2, solubilities in Si-64.6 at. pct Al melt at 1173 K and Si-60.0 at. pct Al melt at 1273 K were determined by measuring the equilibrium concentrations of B and Ti in the presence of TiB2 precipitates. The small solubilities of TiB2 in the Si-Al melt indicate the effective removal of B from the Si-Al melt by Ti addition. Further, solidification experiments of Si-Al alloys containing B by Ti addition were performed, and the effect of Ti addition on the solidification refining of Si with the Si-Al melt was successfully confirmed.

引用

页码：837 / 842

页数：6

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