In-situ synthesis of nanocrystalline TiC powders, nanorods, and nanosheets in molten salt by disproportionation reaction of Ti(Ⅱ) species

作者：Lingxu Yang; Ying Wang; Ruijia Liu; Huijun Liu^*; Xue Zhang; Chaoliu Zeng; Chao Fu

来源：Journal of Materials Science & Technology, 2020, 37(02): 173-180.

• Titanium carbide
• Nanocrystalline
• Nanorod
• Nanosheet
• Disproportionation
• Molten salt

A high-efficiency method is developed to in-situ synthesize nanocrystalline TiC powders, nanorods, and nanosheets by using equimolar ratio of Ti powder and acetylene black, multiwalled carbon nanotubes(MWCNTs), and graphene, respectively, as precursor in eutectic Na Cl-KCl molten salt at 800–900℃ for 2–3 h. Higher temperature and longer duration are more beneficial for TiC preparation. In addition, mechanism of TiC formation was investigated by linear scan voltammetry. Results indicate that nanocrystalline TiC is in-situ synthesized by reaction between Ti atoms, which come from disproportionation reaction of Ti(Ⅱ) species in the molten salt, and C atoms on the surface of carbon sources.

• 单位
  中国科学技术大学