Electrolytic Production of Ti5Si3/TiC Composites by Solid Oxide Membrane Technology

This paper investigated the electrolytic production of Ti 5 Si 3 /TiC composites from TiO 2 /SiO 2 /C in molten CaCl 2 . The solid-oxide oxygen-ion-conducting membrane tube filled with carbon-saturated liquid tin was served as the anode, and the pressed spherical TiO 2 /SiO 2 /C pellet was used as t...

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Bibliographic Details
Published in:JOM (1989) 2018-02, Vol.70 (2), p.138-143
Main Authors: Zheng, Kai, Zou, Xingli, Xie, Xueliang, Lu, Changyuan, Chen, Chaoyi, Xu, Qian, Lu, Xionggang
Format: Article
Language:English
Subjects:
Chemistry/Food Science
Earth Sciences
Engineering
Environment
Physics
Toward Resources and Processes Sustainability: Part I
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Summary:This paper investigated the electrolytic production of Ti 5 Si 3 /TiC composites from TiO 2 /SiO 2 /C in molten CaCl 2 . The solid-oxide oxygen-ion-conducting membrane tube filled with carbon-saturated liquid tin was served as the anode, and the pressed spherical TiO 2 /SiO 2 /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: TiO 2 /SiO 2 /C → Ti 2 O 3 , CaTiO 3 , Ca 2 SiO 4 , SiC → Ti 5 Si 3 , TiC. The morphology observation and the elemental distribution analysis indicate that the reaction routes for Ti 5 Si 3 and TiC products are independent during the electroreduction process.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-017-2693-z