F/Cl比对卤磷酸钙固溶体Bi离子掺杂位点及价态的调控（英文）  

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

作　　者：张庆福[1] 李臣[2] 宋志国[1] 李永进[2] 邱建备[1] 杨正文[1] 

机构地区：[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

出　　处：《无机材料学报》2017年第6期661-666,共6页Journal of Inorganic Materials

基　　金：National Natural Science Foundation of China(61465006,61265007);Reserve Talents Project of Yunnan Province(2015HB013)

摘　　要：本工作研究了卤素离子含量对卤磷酸钙固溶体中Bi离子的价态和发光性能的影响。荧光分析表明,卤素磷酸钙中的Bi^(2+)/Bi^(3+)可以通过其F-/Cl-组分变化实现有效调控;当卤素离子全部为Cl-离子时,晶体中Bi^(2+)全部消失。上述现象的主要原因在于,当卤素离子为F或者Cl时,晶体中与其邻近的Ca(2)位点可以被分裂为Ca(2)a或Ca(2)b两种不同的格位,而Ca(2)a位点则有利于实现Bi^(3+)的自还原。上述研究结果可以为Bi离子在晶体中的价态调控提供指导。Effect of halide ions on valence state and luminescence property of Bi ions in calcium halophosphates was investigated. Bi-activated fiuorapatite-chlorapatite solid solutions were synthesized by a solid state reaction. The con- tent ratio between Bi^2＋ and Bi^3＋ ions in the crystals could be tuned rationally by the component ratio of F/CI, and the absent emission of Bi^2＋ ion occur when halide ions are all occupied by CI 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 CI 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 sci- entific reference for controlling the valence state of Bi ions in crystals.

关 键 词：卤磷酸钙 BI 发光性能 调控 

分 类 号：O482[理学—固体物理]