caa a22 4500 388021373 CHVBK 20180307124925.0 cr unu---uuuuu 161130e199802 xx s 000 0 eng 10.1557/JMR.1998.0061 doi S0884291400042989 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0061 Preparation and optical properties of nanocrystallites of RE2Sn2−xB′xO7 (RE [Elektronische Daten] Sm, Ce; B′ = Fe, Co, Ni; 0.0 ≤ x ≤ 1.0) 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. Copyright © Materials Research Society 1998 Gong Xiong Institute of Modern Optics, Nankai University, Tianjin 300071, People's Republic of China Wu Pengfei Institute of Physics, The Academy of Chinese Sciences, Beijing 100808, People's Republic of China Chen Wenju Institute of Modern Optics, Nankai University, Tianjin 300071, People's Republic of China Yang Hongxiu Department of Chemistry, Tianjin University, Tianjin 300072, People's Republic of China Journal of Materials Research Cambridge University Press 13/2(1998-02), 469-474 0884-2914 13:2<469 1998 13 JMR https://doi.org/10.1557/JMR.1998.0061 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0061 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gong Xiong Institute of Modern Optics, Nankai University, Tianjin 300071, People's Republic of China NATIONALLICENCE 700 1- Wu Pengfei Institute of Physics, The Academy of Chinese Sciences, Beijing 100808, People's Republic of China NATIONALLICENCE 700 1- Chen Wenju Institute of Modern Optics, Nankai University, Tianjin 300071, People's Republic of China NATIONALLICENCE 700 1- Yang Hongxiu Department of Chemistry, Tianjin University, Tianjin 300072, People's Republic of China NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/2(1998-02), 469-474 0884-2914 13:2<469 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge