Physical Chemistry on Low Temperature Solidification Refining of Solar Grade Silicon Using Solvent

太阳能级硅溶剂低温凝固精炼的物理化学研究

• 批准号: 22360312
• 负责人: MORITA Kazuki
• 金额: $ 9.82万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22360312/
• 关键词: 溶融・凝固; 太陽電池シリコン; 低温凝固精製; 銅; スズ; 融体・凝固; ボロン; 融体; 凝固

By unidirectional solidification of Cu-Si and Sn-Si alloys, optimized cooling condition for producing a bulk Si crystal as well as the refining effect was investigated. Bulk Si was obtained by controlling the temperature gradient and cooling rate for both solvents and the solidification rates were found to be controlled by the diffusion of Si in the solvents. Refining effects were no so significant as that of Al-Si solvent which was clarified and our former research. From the thermodynamic measurement of Sn-Si-B system, instability of B in the melts was clarified and more effective removal of B using CaO-CaF2-SiO2 slag was verified.

通过对Cu-Si和Sn-Si合金的定向凝固，研究了获得块体Si晶体的最佳冷却条件和细化效果。通过控制两种溶剂的温度梯度和冷却速率，获得了体硅，发现凝固速率受硅在溶剂中的扩散控制。精炼效果不如已澄清的Al-Si溶剂和我们以前的研究显著。通过对Sn-Si-B系的热力学测定，阐明了B在熔体中的不稳定性，验证了CaO-CaF 2-SiO2渣系能更有效地去除B。

项目成果

Solidification Refining of Si for Solar Cells using Si-Sn Solvent

使用 Si-Sn 溶剂凝固精炼太阳能电池用硅

• 发表时间: 2012
• 作者: X.Ma ;T.Yoshikawa ;K.Morita
• 通讯作者: K.Morita

PhaseRelations for the Si-Sn-B System at1673 K

Si-Sn-B 系统在 1673 K 时的相关系

• 发表时间: 2011
• 作者: X.Ma ;T.Yoshikawa ;K.Morita
• 通讯作者: K.Morita

Solvent Refining of Si for Solar Cells Using a Si-Sn Solvent

使用 Si-Sn 溶剂对太阳能电池用硅进行溶剂精炼

• 发表时间: 2012
• 作者: X.Ma;T.Yoshikawa;K.Morita
• 通讯作者: K.Morita

レアメタルの最新動向

稀有金属最新趋势

• 发表时间: 2012
• 作者: 吉川健;森田一樹
• 通讯作者: 森田一樹

Removal of Boron from Silicon-Tin Solvent by Slag Treatment

• DOI: 10.1007/s11663-013-9812-1
• 发表时间: 2013-06-01
• 期刊: METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
• 影响因子: 3
• 作者: Ma, Xiaodong;Yoshikawa, Takeshi;Morita, Kazuki
• 通讯作者: Morita, Kazuki