激活剂Pr_2O_3对CaWO_4发光性能的影响  

Effect of Activator Pr_2O_3 on the Luminescent Properties of CaWO_4

作　　者：李敏[1] 沈斌[1] 朱相任[1] 金日光[1] 杨儒[1] 李友芬[1] 刘家祥[1] 

机构地区：[1]北京化工大学新型高分子材料制备与加工北京市重点实验室,北京100029

出　　处：《稀有金属材料与工程》2008年第A01期281-284,共4页Rare Metal Materials and Engineering

摘　　要：采用高温固相法合成红色荧光材料CaWO_4:Pr^(3+),对样品的表面形貌、晶体结构、激发光谱和发射光谱进行了表征。结果表明制得的CaWO_4属四方晶系,I4_1/a(No.88,C_(4h)~6)空间群。CaWO_4体系中加入H_3BO_3助熔剂,生成的晶体粒径较大,结晶更加完善,粒径大小约为20～40μm。当Pr^(3+)浓度为1.4%～2.0%时,样品在603、617和648 nm处的发光强度最强,随着Pr^(3+)浓度的增加CaWO_4自发光强度被逐渐削弱。Red phosphor CaWO4： Pr^3＋ was synthesized by high temperature solid phase reaction, and their surface configurations, crystal structures, excitation and emission spectra were studied. The prepared CaWO4 was tetragonal, belonging to the I41/ a （No. 88, C4h^6） space group. Addition of H3BO3 as assistant flux enlarged crystal size to 20～40 μm, and improved the crystal texture. Strong luminescent was observed at 603 nm, 617 nm and 648 nm for the materials containing Pr^3＋ between1.4%～2.0%, and the luminescence weakened with further increasing Pr^3＋ concentration.

关 键 词：稀土 发光 激活剂 钨酸钙 

分 类 号：O482.31[理学—固体物理]