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有色金属(冶炼部分):2020,(1):36-39
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熔盐电解SiO2/TiO2制备硅钛合金的研究
(1.昆明理工大学 冶金与能源工程学院;2.锂离子电池及材料国家地方联合工程实验室)
Study on Electrochemical Preparation of Si-Ti Alloy from SiO2/TiO2 in Molten Salt
ZHOU Zhong-ren1,2,3,2, ZHANG Ying-jie, HUA Yi-xin, DONG Peng, ZHANG Yi-yong, MENG Qi
(1.Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology;2.China;3.State Key Lab of Complex Nonferrous Metal Resources Clean Utilization)
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投稿时间:2019-09-05     修订日期:2019-09-09     录用日期:2019-09-10     网络发布日期:2019-12-18
中文摘要: 采用熔盐电解法通过直接电解SiO2、TiO2混合物料来制备硅钛合金。热力学计算结果表明,在700 ℃下,SiO2和TiO2的理论分解电压分别为1.28 V和1.37 V,生成的单质硅和钛在高温下能够自发进行合金化反应,生成硅钛系列合金,且容易倾向于生成稳定合金相TiSi2合金。研究表明,以摩尔比50︰1的SiO2/TiO2混合物料为原料,在等摩尔比的CaCl2-NaCl混合熔盐中,在700 ℃、2.4 V槽电压下,经过5 h电解后,制备得到TiSi2/Si合金,微观形貌为粒径0.2~2.5 μm的多孔颗粒堆积,单质硅颗粒覆盖在TiSi2合金颗粒表面。
中文关键词: TiSi2/Si  硅钛合金  熔盐电解
Abstract:Silicon-titanium alloy was prepared by direct electrolysis of SiO2 and TiO2 mixture through molten salt electrolysis. According to thermodynamic calculation, theoretical decomposition voltage of SiO2 and TiO2 at 700 ℃ is 1.28 V and 1.37 V respectively. Reduced metallic Si and Ti can react spontaneously to form Si-Ti alloys at high temperature, and stable TiSi2 alloy phase is produced more easily than other alloyed phases. Experimental results suggest that TiSi2/Si can be produced applying SiO2/TiO2 with molar ratio of 50︰1 as raw material in equimolar CaCl2-NaCl molten salt under 2.4 V cell voltage at 700 ℃ for 5 h. Morphology of TiSi2/Si is accumulation of porous particles with particle size of 0.2~2.5 μm, and metallic silicon covers surface of TiSi2 alloy.
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基金项目:国家自然科学基金资助项目(51804148,51764029);云南省应用基础研究计划项目(2018FD038)
引用文本:
周忠仁,张英杰,华一新,董鹏,张义永,孟奇.熔盐电解SiO2/TiO2制备硅钛合金的研究[J].有色金属(冶炼部分),2020(1):36-39.
ZHOU Zhong-ren,ZHANG Ying-jie,HUA Yi-xin,DONG Peng,ZHANG Yi-yong,MENG Qi.Study on Electrochemical Preparation of Si-Ti Alloy from SiO2/TiO2 in Molten Salt[J].Nonferrous Metals (Extractive Metallurgy),2020(1):36-39.

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