Carbothermal synthesis of ultra-fine zirconium carbide powders using inorganic precursors via sol–gel method |
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Authors: | Yongjie Yan Zhengren Huang Xuejian Liu Dongliang Jiang |
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Institution: | (1) Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, P.R. China;(2) Graduate School of the Chinese Academy of Sciences, Beijing, 100039, P.R. China |
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Abstract: | Ultra-fine zirconium carbide (ZrC) powders have been synthesized by carbothermal reduction reactions using inorganic precursors
zirconium oxychloride (ZrOCl2 · 8H2O) as sources of zirconium and phenolic resin as the carbon source. The reactions were substantially completed at relatively
lower temperatures (∼1400 °C/1 h) and the synthesized powders had a small average crystallite size (<200 nm) and a large specific
area (54 m2/g). The oxygen content of the powder synthesized at 1400 °C/1 h was less than 1.0 wt%. The thermodynamic change process in
the ZrO2–C system and the synthesis mechanism were studied. |
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Keywords: | Zirconium carbide Sol– gel Ultra-fine Carbothermal reduction |
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