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Preparation of Magnéli Phase Ti n O2 n -1 by Carbothermal Reduction Sieving Method in Air Atmosphere
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Affiliation:

1.Yunnan Normal University, Kunming 650500, China;2.Panzhihua University, Panzhihua 617000, China

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Fund Project:

National Natural Science Foundation of China (U1802257)

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    Abstract:

    A novel method for fabricating Magnéli phase (MP) TinO2n-1 (4<n<10), carbothermal reduction sieving, in air atmosphere was introduced. The influence of the reduction temperature and reduction time on the phase structure and resistivity of reduction product was investigated. The results show that increasing the reduction temperature and prolonging the reduction time are beneficial for the reduction of TiO2 to MP TinO2n-1. MP TinO2n-1 (n=4, 5) powder was obtained after reduction at 1350 °C for 20 min, and its particle size is 0.5~8 μm according to results of scanning electron microscopy analysis. Resistivity of the reduction product is decreased significantly with prolonging the reduction time at 1350 °C. The minimum resistivity of 79.3 Ω?cm is achieved for the product after reduction at 1350 °C for 50 min, and the phase composition is mainly Ti3O5.

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[Hou Jing, Yang Peizhi, Zheng Qinhong, Wu Enhui, Li Jun. Preparation of Magnéli Phase Ti n O2 n -1 by Carbothermal Reduction Sieving Method in Air Atmosphere[J]. Rare Metal Materials and Engineering,2021,50(11):3824~3827.]
DOI:10.12442/j. issn.1002-185X.20201007

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History
  • Received:December 29,2020
  • Revised:June 20,2021
  • Adopted:July 09,2021
  • Online: November 25,2021
  • Published: November 24,2021