Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (10): 1423-1427.DOI: 10.12068/j.issn.1005-3026.2018.10.011

• Materials & Metallurgy • Previous Articles     Next Articles

Thermal Decomposition Mechanism of Terbium Chloride Aerosol at High Temperature

XUE Shou-feng, WU Wen-yuan, BIAN Xue   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2017-05-12 Revised:2017-05-12 Online:2018-10-15 Published:2018-09-28
  • Contact: WU Wen-yuan
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Abstract: Using TbCl3 aerosol as the precursor, the thermal decomposition mechanism of TbCl3 at high temperature was investigated from micro-and nano-scale in the condition of air atmosphere, and the phase composition and morphology of the pyrolysis products were characterized by XRD and FESEM, respectively. Based on the experimental results and thermodynamic analysis, it was discussed about the chemical reaction mechanism of the TbO2 formation by thermal decomposition of TbCl3 and kinetic reasons for promoting the conversion of TbCl3 to terbium oxide. The results showed that the thermal decomposition of TbCl3 could produce the stoichiometric form of TbO2, the non-stoichiometric form of Tb7O12 was obtained when the thermal decomposition temperature was above 800℃, and TbOCl was not found in the pyrolysis products. From intermediate compounds observed in the pyrolysis products of the TbCl3 aerosol, it is helpful to understand its property and thermal decomposition process.

Key words: TbCl3, aerosol, thermal decomposition, mechanism, Tb(OH)2Cl, TbO2

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