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Preparation and optical properties of nanocrystallites of RE2Sn2−xB′xO7 (RE = Sm, Ce; B′ = Fe, Co, Ni; 0.0 ≤ x ≤ 1.0)

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Abstract

New pyrochlore-type rare-earth-complex oxides of nanometer size and with B-site dopants, RE2Sn2−xB′xO7 (RE = Sm, Ce; B′= Fe, Co, Ni; 0.0 ≤ x ≤ 1.0), have been prepared by the nonalcoholate sol-gel method. The range of average particle size is from 25 to 30 nm. It is found that this method can lower the reaction temperature (about 500 K) and shorten the reaction time. The crystal structures of these nanocrystallites belong to the cubic system, and their lattice parameters are linearly related to the content of the dopant ions. The IR spectra of these nanocrystallites were investigated, and the excitation and emission spectra for these systems show that the luminescent intensities of RE3+ become weaker with the iron-group dopant in the order of Fe, Co, and Ni.

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Author notes

  1. Xiong Gong

    Present address: Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, USA

Authors and Affiliations

  1. Institute of Modern Optics, Nankai University, Tianjin, 300071, People’s Republic of China

    Xiong Gong & Wenju Chen

  2. Institute of Physics, The Academy of Chinese Sciences, Beijing, 100808, People’s Republic of China

    Pengfei Wu

  3. Department of Chemistry, Tianjin University, Tianjin, 300072, People’s Republic of China

    Hongxiu Yang

Authors
  1. Xiong Gong
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  2. Pengfei Wu
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  3. Wenju Chen
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  4. Hongxiu Yang
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Gong, X., Wu, P., Chen, W. et al. Preparation and optical properties of nanocrystallites of RE2Sn2−xB′xO7 (RE = Sm, Ce; B′ = Fe, Co, Ni; 0.0 ≤ x ≤ 1.0). Journal of Materials Research 13, 469–474 (1998). https://doi.org/10.1557/JMR.1998.0061

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  • DOI: https://doi.org/10.1557/JMR.1998.0061

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