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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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电子束熔炼冶金级硅除铝研究
Keywords: 无机非金属材料,硅,电子束熔炼,分凝,挥发
Abstract:
？采用电子束熔炼工艺提纯了冶金级硅材料。硅中重要杂质元素al在制备铸锭中的分布不均匀,呈现出由底部到顶部、由边缘到中心的富集趋势。铸锭边缘部位的杂质al含量最低,已经低于icp--aes的探测极限(1×10-5%)。对杂质al的挥发去除过程进行了理论分析。由langmuir方程和henry定律导出了杂质al的去除率与熔体表面温度、熔炼时间的关系式,该关系式表明杂质al的去除率会随着熔体表面温度升高、熔炼时间延长而增加,其理论计算值与实测结果符合的较好。
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