Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (6): 661-666.DOI: 10.15541/jim20160471

• Orginal Article • Previous Articles     Next Articles

Tuning Bismuth Activator Valence in Calcium Halophosphate Solid Solution by Controlling Activator Site

ZHANG Qing-Fu1, LI Chen1, SONG Zhi-Guo1, LI Yong-Jin2, QIU Jian-Bei1, YANG Zheng-Wen1   

  1. (1. 昆明理工大学 材料科学与工程学院, 昆明650093; 2. 云南工商学院, 昆明651700)
  • Received:2016-08-17 Published:2017-06-20 Online:2017-05-27
  • About author:ZHANG Qing-Fu(1993–), male, undergraduate. E-mail: kmlgzqf@hotmail.com
  • Supported by:
    National Natural Science Foundation of China (61465006, 61265007);Reserve Talents Project of Yunnan Province (2015HB013)

Abstract:

Effect of halide ions on valence state and luminescence property of Bi ions in calcium halophosphates was investigated. Bi-activated fluorapatite-chlorapatite solid solutions were synthesized by a solid state reaction. The content ratio between Bi2+ and Bi3+ ions in the crystals could be tuned rationally by the component ratio of F-/Cl-, and the absent emission of Bi2+ ion occur when halide ions are all occupied by Cl- ions. The origin of this change is because the Ca2 site of calcium halophosphate is split into Ca(2)a and Ca(2)b sites for F- and Cl- as the nearest neighbors, and the Ca(2)a is adopted to offer activator site that enables Bi3+ to be self-reduced. The results in this study can provide a scientific reference for controlling the valence state of Bi ions in crystals.

Key words: calcium halophosphate, bismuth, luminescence properties, control

CLC Number: