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Title: Synthesis and VUV-UV spectroscopic properties of rare earth borosilicate oxyapatite: RE {sub 5}Si{sub 2}BO{sub 13}:Ln {sup 3+} (RE=La, Gd, Y; Ln=Eu, Tb)

Abstract

Three rare earth borosilicate oxyapatites, RE {sub 5}Si{sub 2}BO{sub 13} (RE=La, Gd, Y), were synthesized via wet chemical method, of which RE {sub 5}Si{sub 2}BO{sub 13} (RE=Gd, Y) were first reported in this work. In the three oxyapatites, [BO{sub 4}] and [SiO{sub 4}] share the [TO{sub 4}] tetrahedral oxyanion site, and RE {sup 3+} ions occupy all metal sites. The differential scanning calorimetry-thermo gravimetry measurements and high temperature powder X-ray diffraction pattern revealed a vitrification process within 300-1200 deg. C, which was due to the glass-forming nature of borosilicates. From the VUV excitation spectra of Eu{sup 3+} and Tb{sup 3+} in RE {sub 5}Si{sub 2}BO{sub 13}, the optical band gaps were found to be 6.31, 6.54 and 6.72 eV for RE {sub 5}Si{sub 2}BO{sub 13} (RE=La, Gd, Y), respectively. The emission and excitation bands of Eu{sup 3+} and Tb{sup 3+} are discussed relating with their coordination environments. Among the three hosts, Y{sub 5}Si{sub 2}BO{sub 13} would be the best for Eu{sup 3+} and Tb{sup 3+}-doped phosphors. - Graphical abstract: The perspective view of RE {sub 5}Si{sub 2}BO{sub 13} (RE=La, Gd, Y) oxyapatite along [001] direction. All non-tetrahedral metal sites are occupied by RE {sup 3+}, and the tetrahedral sites bymore » SiO{sub 4} and BO{sub 4} groups. Y{sub 5}Si{sub 2}BO{sub 13} is a good host for both Eu{sup 3+} and Tb{sup 3+} activated phosphors.« less

Authors:
 [1];  [2];  [1];  [2];  [1];  [2];  [1];  [3];  [4];  [4]
  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China)
  2. (China)
  3. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China), E-mail: jtzhao@mail.sic.ac.cn
  4. NSRL, University of Science and Technology of China, Hefei 230027 (China)
Publication Date:
OSTI Identifier:
21015785
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal Issue: 4; Other Information: DOI: 10.1016/j.jssc.2007.01.033; PII: S0022-4596(07)00066-7; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; APATITES; BORATES; BORON SILICATES; BOROSILICATE GLASS; CALORIMETRY; DOPED MATERIALS; EUROPIUM IONS; EV RANGE 01-10; FAR ULTRAVIOLET RADIATION; GRAVIMETRY; PHOSPHORS; RARE EARTH COMPOUNDS; SILICON OXIDES; SPECTRA; SPECTROSCOPY; SYNTHESIS; TEMPERATURE RANGE 0400-1000 K; TEMPERATURE RANGE 1000-4000 K; TERBIUM IONS; VITRIFICATION; X-RAY DIFFRACTION

Citation Formats

Yuan Junlin, Graduate School of Chinese Academy of Sciences, Beijing, Zhang Zhijun, Graduate School of Chinese Academy of Sciences, Beijing, Wang Xiaojun, Graduate School of Chinese Academy of Sciences, Beijing, Chen Haohong, Zhao Jingtai, Zhang Guobin, and Shi Chaoshu. Synthesis and VUV-UV spectroscopic properties of rare earth borosilicate oxyapatite: RE {sub 5}Si{sub 2}BO{sub 13}:Ln {sup 3+} (RE=La, Gd, Y; Ln=Eu, Tb). United States: N. p., 2007. Web. doi:10.1016/j.jssc.2007.01.033.
Yuan Junlin, Graduate School of Chinese Academy of Sciences, Beijing, Zhang Zhijun, Graduate School of Chinese Academy of Sciences, Beijing, Wang Xiaojun, Graduate School of Chinese Academy of Sciences, Beijing, Chen Haohong, Zhao Jingtai, Zhang Guobin, & Shi Chaoshu. Synthesis and VUV-UV spectroscopic properties of rare earth borosilicate oxyapatite: RE {sub 5}Si{sub 2}BO{sub 13}:Ln {sup 3+} (RE=La, Gd, Y; Ln=Eu, Tb). United States. doi:10.1016/j.jssc.2007.01.033.
Yuan Junlin, Graduate School of Chinese Academy of Sciences, Beijing, Zhang Zhijun, Graduate School of Chinese Academy of Sciences, Beijing, Wang Xiaojun, Graduate School of Chinese Academy of Sciences, Beijing, Chen Haohong, Zhao Jingtai, Zhang Guobin, and Shi Chaoshu. Sun . "Synthesis and VUV-UV spectroscopic properties of rare earth borosilicate oxyapatite: RE {sub 5}Si{sub 2}BO{sub 13}:Ln {sup 3+} (RE=La, Gd, Y; Ln=Eu, Tb)". United States. doi:10.1016/j.jssc.2007.01.033.
@article{osti_21015785,
title = {Synthesis and VUV-UV spectroscopic properties of rare earth borosilicate oxyapatite: RE {sub 5}Si{sub 2}BO{sub 13}:Ln {sup 3+} (RE=La, Gd, Y; Ln=Eu, Tb)},
author = {Yuan Junlin and Graduate School of Chinese Academy of Sciences, Beijing and Zhang Zhijun and Graduate School of Chinese Academy of Sciences, Beijing and Wang Xiaojun and Graduate School of Chinese Academy of Sciences, Beijing and Chen Haohong and Zhao Jingtai and Zhang Guobin and Shi Chaoshu},
abstractNote = {Three rare earth borosilicate oxyapatites, RE {sub 5}Si{sub 2}BO{sub 13} (RE=La, Gd, Y), were synthesized via wet chemical method, of which RE {sub 5}Si{sub 2}BO{sub 13} (RE=Gd, Y) were first reported in this work. In the three oxyapatites, [BO{sub 4}] and [SiO{sub 4}] share the [TO{sub 4}] tetrahedral oxyanion site, and RE {sup 3+} ions occupy all metal sites. The differential scanning calorimetry-thermo gravimetry measurements and high temperature powder X-ray diffraction pattern revealed a vitrification process within 300-1200 deg. C, which was due to the glass-forming nature of borosilicates. From the VUV excitation spectra of Eu{sup 3+} and Tb{sup 3+} in RE {sub 5}Si{sub 2}BO{sub 13}, the optical band gaps were found to be 6.31, 6.54 and 6.72 eV for RE {sub 5}Si{sub 2}BO{sub 13} (RE=La, Gd, Y), respectively. The emission and excitation bands of Eu{sup 3+} and Tb{sup 3+} are discussed relating with their coordination environments. Among the three hosts, Y{sub 5}Si{sub 2}BO{sub 13} would be the best for Eu{sup 3+} and Tb{sup 3+}-doped phosphors. - Graphical abstract: The perspective view of RE {sub 5}Si{sub 2}BO{sub 13} (RE=La, Gd, Y) oxyapatite along [001] direction. All non-tetrahedral metal sites are occupied by RE {sup 3+}, and the tetrahedral sites by SiO{sub 4} and BO{sub 4} groups. Y{sub 5}Si{sub 2}BO{sub 13} is a good host for both Eu{sup 3+} and Tb{sup 3+} activated phosphors.},
doi = {10.1016/j.jssc.2007.01.033},
journal = {Journal of Solid State Chemistry},
number = 4,
volume = 180,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}