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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.124  No.11 (November) (2016)  >  pp.1171-1174

Journal of the Ceramic Society of Japan
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Low-temperature preparation of ZrC powders using a combined sol–gel and microwave carbothermal reduction method

Yingnan CAO1) 2), Faliang LI1), Haijun ZHANG1), Shaowei ZHANG1), Feng LIANG1), Jianghao LIU1)
1) The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology 2) State Key Laboratory of Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd.

ZrC powders were synthesized by a combined sol–gel and microwave carbothermal reduction method using zirconium oxychloride and citric acid as starting materials. The effects of firing temperature and n(C)/n(Zr) molar ratio on the synthesis of ZrC powders were studied. The results showed that the optimal n(C)/n(Zr) for the preparation of phase pure ZrC powders was 5.0, and the firing temperature required was 1573 K. This synthesis temperature was 200 K lower than that required by using conventional carbothermal reduction method. Microstructures and phase morphologies of as-prepared ZrC powders were examined by using a field emission–scanning electron microscope (FE–SEM) and a transmission electron microscope (TEM), revealing that the grain sizes of ZrC in the samples prepared at 1573 K for 3 h were about 200–300 nm.

ZrC, Sol–gel, Microwave heating, Carbothermal reduction

Received: March 31, 2016
Accepted: August 19, 2016 , Published online: November 01, 2016



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