Effect of sintering temperature on the electrolysis of TiO_2
Effect of sintering temperature on the electrolysis of TiO_2作者机构：College of Chemistry and Chemical Engineering Chongqing University Chongqing 400044 China College of Materials Science and Engineering Chongqing University Chongqing 400044 China
出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)
年 卷 期：2012年第19卷第7期
页 面：636-641页
核心收录：
学科分类：080503[工学-材料加工工程] 081702[工学-化学工艺] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学]
主 题：titanium dioxidegelectrolysis sintering microstructure
摘 要：The effects of sintering temperature on the microstructure and the conductivity of TiO2 cathodes were studied by examining the phase composition, microstructure, and element contents of the sintered cathodes and the cathodic products using X-ray diffraction and scan- ning electronic microscopy-energy dispersive spectrometry. The oxygen vacancy, conductivity, average pore diameter, and specific surface area of the sintered cathodes were detected by X-ray photoelectron spectroscopy, four-point probe, and ASPA 2010. The results showed that TiO2 phase transformations occurred, and oxygen vacancies formed with the increase of sintering temperature. The cathodic conductivity improved, but the average pore diameter and the effective response area of the TiO2 cathode were reduced when the sintering temperature in- creased. These phenomena could weaken the contact between reaction ions and electrons and also had the same effect on the cathodes and the molten salt. Moreover, they were disadvantageous to ion migration, so a lower sintering temperature was favorable for the microstructure of electrolysis. Consequently, the cathodic conductivity may be improved, but the microstrucatre became compact with the increase of sin- tering temperature. The cathodic products at different temperatures indicated that the cathodic conductivity was more important for electroly- sis.
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