| 透氧膜法由SiO2直接制备Si |
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| 引用本文： | 赵炳建,鲁雄刚,邹星礼,谷山林,陶伟. 透氧膜法由SiO2直接制备Si[J]. 材料科学与工艺, 2011, 19(2): 113-117 |
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| 作者姓名： | 赵炳建 鲁雄刚 邹星礼 谷山林 陶伟 |
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| 作者单位： | 上海大学上海市现代冶金与材料制备重点实验室;河北钢铁集团唐山钢铁股份有限公司;上海大学上海市现代冶金与材料制备重点实验室;上海大学上海市现代冶金与材料制备重点实验室;上海大学上海市现代冶金与材料制备重点实验室;上海大学上海市现代冶金与材料制备重点实验室 |
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| 基金项目： | 国家重点基础研究发展计划资助项目(2007CB613606);国家自然科学基金资助项目(51074105);上海大学研究生创新基金资助资助(SHUCX101052) |
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| 摘 要： | 为改变硅生产工艺高污染、高能耗的现状,研究了在CaCl2熔盐中利用固体透氧膜法(SOM)直接电解SiO2制备单质Si,考察了电解电压、电解时间、熔盐温度等参数对电解效果的影响,采用电子扫描显微镜和X射线衍射分析了电解产物形貌及相组成.结果表明:1100℃熔盐中,3.5 V电压下电解2 h,可制得纯Si,电流效率为89%...
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| 关 键 词： | 透氧膜 电解 硅 熔盐 |
Direct preparation of Si from SiO2 by SOM process |
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| ZHAO Bing-jian,LU Xiong-gang,ZOU Xing-li,GU Shan-lin and TAO Wei. Direct preparation of Si from SiO2 by SOM process[J]. Materials Science and Technology, 2011, 19(2): 113-117 |
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| Authors: | ZHAO Bing-jian LU Xiong-gang ZOU Xing-li GU Shan-lin TAO Wei |
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| Affiliation: | Shanghai Key Laboratory of Modern Metallurgy and Materials Processing,Shanghai University,Shanghai 200072,China;Hebei Iron and Steel Group Tangshan Iron and Steel Co.,Ltd,Tangshan 063016,China;Shanghai Key Laboratory of Modern Metallurgy and Materials Processing,Shanghai University,Shanghai 200072,China;Shanghai Key Laboratory of Modern Metallurgy and Materials Processing,Shanghai University,Shanghai 200072,China;Shanghai Key Laboratory of Modern Metallurgy and Materials Processing,Shanghai University,Shanghai 200072,China;Shanghai Key Laboratory of Modern Metallurgy and Materials Processing,Shanghai University,Shanghai 200072,China |
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| Abstract: | To solve the problem of high environmental impact and high energy consumption in Si industry,electrochemical reduction of solid SiO2 to prepare Si by SOM process was carried out in molten salt.The influences of electrolysis parameters such as reduction time,cell voltage,molten salt temperature on the product were investigated and the micro-structural characteristics and phase composition of the products was examined by SEM and XRD.The results showed that the SiO2 was completely reduced to Si after electrolyzed for 2 h at 3.5 V in 1 100 ℃ molten CaCl2,and the current efficiency was 89%,the electrolysis energy consumption was as low as 15 kW·h/kg.There was CaSiO3formed during electrolysis,and it was deoxidized to Ca and Si finally.The SOM process reduced 50% reaction time compared with FFC process,so that it might have a bright future for industrial application. |
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| Keywords: | solid oxygen-ion membrane electrolysis Si molten salt |
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