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JOURNAL OF SYNTHETIC CRYSTALS ›› 2021, Vol. 50 ›› Issue (1): 80-87.

• Research Articles • Previous Articles     Next Articles

Synthesis of Ultrafine TbO1.81 and Tb2O3 Powders for Magneto-Optical Application

FENG Kai1, LÜ Bin1, CHENG Hongmei1, WU Shaofan2,3, WANG Yan2,3, LIU Yongxing4   

  1. 1. School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China;
    2. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;
    3. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China;
    4. Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province, Ningbo 315211, China
  • Received:2020-10-09 Online:2021-01-15 Published:2021-03-01
  • Contact: LÜ Bin, doctor, associate professor. E-mail:lvbin@nbu.edu.cn
    WANG Yan, doctor, professor. E-mail:wy@fjirsm.ac.cn
  • About author:FENG Kai(1996—), male, from Liaoning Province, postgraduates. E-mail:1109503281@qq.com
  • Supported by:
    National Natural Science Foundation of China (51702171, 51872286, 51832007); Zhejiang Provincial Qianjiang Talent Program of China (QJD1702017); Natural Science Foundation of Ningbo (2019A610052); Key Laboratory of Optoelectronic Materials Chemistry and Physics, Chinese Academy of Sciences (2008DP173016); Science and Technology Plan Leading Project of Fujian Province (2018H0046)

Abstract: Ultrafine TbO1.81 and Tb2O3 powders were obtained from the pyrolytic precursor prepared via a wet chemical route using ammonium hydrogen carbonate (AHC) as the precipitant. The precipitation precursor has a chemical composition of hydrated terbium carbonate and exhibits one-dimensional nanorod morphology. The average width of the nanorods rises as the increase of AHC concentration. Calcining the precursor in air directly yields a round TbO1.81 nanopowder with an average particle size of ~140 nm through dehydration, decarbonation and particle growth processes. On the other hand, a Tb2O3 powder with a finer particle size of ~85 nm is reduced under flowing hydrogen atmosphere upon heating. The molar ratio of AHC to Tb3+ significantly affects the particle dispersion of final oxide products and the best molar ratio for the synthesis of well dispersed powder is 1∶1. The bandgap energies of TbO1.81 and Tb2O3 are ~1.67 eV and 5.20 eV, respectively.

Key words: ultrafine powder, Tb2O3, TbO1.81, co-precipitation method, magneto-optical effect, morphology

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