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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)

Published online by Cambridge University Press:  31 January 2011

Xiong Gong ,
Pengfei Wu ,
Wenju Chen  and
Hongxiu Yang
Xiong Gong
Affiliation:
Institute of Modern Optics, Nankai University, Tianjin 300071, People's Republic of China
Pengfei Wu
Affiliation:
Institute of Physics, The Academy of Chinese Sciences, Beijing 100808, People's Republic of China
Wenju Chen
Affiliation:
Institute of Modern Optics, Nankai University, Tianjin 300071, People's Republic of China
Hongxiu Yang
Affiliation:
Department of Chemistry, Tianjin University, Tianjin 300072, People's Republic of China
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Extract

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.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 2 , February 1998 , pp. 469 - 474
Copyright
Copyright © Materials Research Society 1998

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References

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