Abstract
This paper investigated the electrolytic production of Ti5Si3/TiC composites from TiO2/SiO2/C in molten CaCl2. The solid-oxide oxygen-ion-conducting membrane tube filled with carbon-saturated liquid tin was served as the anode, and the pressed spherical TiO2/SiO2/C pellet was used as the cathode. The electrochemical reduction process was carried out at 1273 K and 3.8 V. The characteristics of the obtained cathode products and the reaction mechanism of the electroreduction process were studied by a series of time-dependent electroreduction experiments. It was found that the electroreduction process generally proceeds through the following steps: TiO2/SiO2/C → Ti2O3, CaTiO3, Ca2SiO4, SiC → Ti5Si3, TiC. The morphology observation and the elemental distribution analysis indicate that the reaction routes for Ti5Si3 and TiC products are independent during the electroreduction process.
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Acknowledgements
The authors thank The National Natural Science Foundation of China (Nos. 51574164, and 51664005) and the National Basic Research Program of China (No. 2014CB643403) for financial support. We also thank the Instrumental Analysis and Research Center of Shanghai University for materials characterization.
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Zheng, K., Zou, X., Xie, X. et al. Electrolytic Production of Ti5Si3/TiC Composites by Solid Oxide Membrane Technology. JOM 70, 138–143 (2018). https://doi.org/10.1007/s11837-017-2693-z
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DOI: https://doi.org/10.1007/s11837-017-2693-z