Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (9): 991-996.doi: 10.15541/jim20160642

• Orginal Article • Previous Articles     Next Articles

Preparation of TiC Nano-particles and Transformation of TiO2 via Microwave Carbothermic Reduction Rout

Zhen-Xia YUAN1(), You-Jun LU1,2(), Wei-Ye CHEN1, Lan-Er WU1,2   

  1. 1. School of Material Science and Engineering, Beifang University of Nationalities, Yinchuan 750021, China
    2. Key Laboratory of Powder Materials & Special Ceramics, Beifang University of Nationalities, Yinchuan 750021, China
  • Received:2016-11-25 Revised:2016-01-05 Online:2017-09-30 Published:2017-08-29
  • About author:YUAN Zhen-Xia. E-mail: 2394053570@qq.com
  • Supported by:
    National Natural Science Foundation of China (51662002);Project of State Ethnic Affairs Commission (14BFZ006);Innovative Talents of Ningxia

Abstract:

TiC powders were prepared via microwave carbothermic reduction in Ar with TiO2 and nano-carbon black as starting materials. Effects of TiO2 particle sizes, temperature and holding time on phase compositions, particle morphologies and TiC yields in the reaction products were investigated by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). Avrami equation was fitted to the change of TiO2 conversion with time at different temperatures. Results show that TiO2 powders with average diameters ranging from 40 to 400 nm were fully reduced at 1300-1400℃ for 30-40 min with TiC yield as high as 98.2%. TiC powder with uniform particle size less than 100 nm was obtained in case of reaction at 1400℃ for 30 min by using 40 nm TiO2 as starting material. Transformation curves of TiO2 were prepared for the synthesis of nano-TiC by microwave carbothermic reduction.

Key words: nano-TiC, microwave synthesis, phase analysis, diffusion mechanism

CLC Number: 

  • TQ174