铋激活碱土金属氟磷酸盐的制备及其发光性质  

Preparation and Luminescence Properties of Bi Activated Alkaline Earth Fluorophosphates

作　　者：李臣[1] 李永进[1] 宋志国[1] 邱建备[1] 赵宗彦[1] 杨正文[1] 尹兆益[1] 王雪[1] 王齐[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《硅酸盐学报》2013年第4期511-515,共5页Journal of The Chinese Ceramic Society

基　　金：国家"973"计划(No.2011CB211708);国家自然科学基金(No.61265007);云南省青年自然科学基金(No.2012FD010和2012FD009);昆明理工大学分析测试基金(No.2011010和2011061)资助项目

摘　　要：用高温固相法在空气中制备了Bi掺杂碱土金属氟磷酸盐[(M5(PO4)3F,M=Ca,Sr,Ba)]荧光粉,通过X射线衍射和荧光光谱对其晶体结构和紫外–可见发光性质进行了分析。结果表明:观察所有样品都得到Bi3+位于紫外波段的特征发光,观察Ca5(PO4)3F:Bi和Sr5(PO4)3F:Bi样品可同时到源于Bi2+明亮的黄白色宽带发射。根据光谱结果和结构特性,分析Bi在氟磷酸盐中的多价态特性及形成机理,结果显示:在氟磷酸盐中存在2种Bi3+发光中心,分别占据2种不同的阳离子(M2+)格位;在Ca5(PO4)3F:Bi和Sr5(PO4)3F:Bi中,位于M2+(1)位点的Bi3+可被电荷补偿等因素的非常规还原作用还原为Bi2+,Bi掺杂的Ca5(PO4)3F和Sr5(PO4)3F有望成为一类新型的黄白色荧光粉。Alkaline earth fluorophosphates doped Bi （M5（PO4）3F,M=Ca,Sr, Ba） were synthesized by a high temperature solid-state method in air. The samples were characterized by X-ray diffraction and photoluminescence spectroscopy, respectively. The results show that all the samples exhibit ultraviolet （UV） luminescence of Bi^3＋. The yellow-white broadband emission from Bi^2＋ was observed in the Bi doped Ca5（PO4）3F and Sr5（PO4）3F. According to the emission data with the lattice sites of samples, there were two types of Bi ions, i.e., Bi^3＋ and Bi^2＋ in Ca5（PO4）3F and Sr5（PO4）3F crystals, and each located on one of the two M lattice sites. The Bi^3＋ ion occupying M^2＋（1） sites was reduced to Bi^2＋ due to the self-reduction and the ionic radii in alkaline earth fluorophosphates. It was indicated that Ca5（PO4）3F and Sr5（PO4）3F doped Bi could be promising candidates for yellow phosphors.

关 键 词：碱土金属氟磷酸盐 铋离子 晶体结构 自还原 

分 类 号：O734[理学—晶体学]