Effect of starting composition and post-anneal on the structure and luminescence properties of Eu-doped Ca-α-SiAlON phosphors prepared by combustion synthesis  

作　　者：陈莹 袁轩一 陈克新 崔巍 葛一瑶 

机构地区：[1]State Key Laboratory of New Ceramics and Fine Processing, School of Materials, Tsinghua University [2]Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of China

出　　处：《Journal of Rare Earths》2014年第6期501-507,共7页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(51302311);the National High Technology Research and Development Program of China(2009AA03Z211)

摘　　要：Eu-doped Ca-α-SiAlON yellow phosphors, with the compositions Ca0.72Eu0.08Si9.56Al2.44O0.84N15.16, were prepared by a highly efficient combustion synthesis method. By optimizing the starting compositions of reactants and choosing appropriate post-annealing conditions, phase-pure, uniform and fine Ca-α-sialon：Eu2＋ phosphors possessing the particle size ranging -3-5μm, and good luminescence properties with an intense emission band that peaks at 592 nm under n-UV or blue light excitation were ob-tained. The results indicated that combustion synthesis method was an energy efficient, time saving and low cost way to prepare Ca-α-SiAlON phosphors by controlling the mass ratio of comburents. A combination with post-annealing treatment was desired for further increase of the properties of Ca-α-SiAlON phosphors.Eu-doped Ca-α-SiAlON yellow phosphors, with the compositions Ca0.72Eu0.08Si9.56Al2.44O0.84N15.16, were prepared by a highly efficient combustion synthesis method. By optimizing the starting compositions of reactants and choosing appropriate post-annealing conditions, phase-pure, uniform and fine Ca-α-sialon：Eu2＋ phosphors possessing the particle size ranging -3-5μm, and good luminescence properties with an intense emission band that peaks at 592 nm under n-UV or blue light excitation were ob-tained. The results indicated that combustion synthesis method was an energy efficient, time saving and low cost way to prepare Ca-α-SiAlON phosphors by controlling the mass ratio of comburents. A combination with post-annealing treatment was desired for further increase of the properties of Ca-α-SiAlON phosphors.

关 键 词：combustion synthesis Ca-α-SiAlON：Eu2＋ photolummescence post-anneal rare earths 

分 类 号：TQ422[化学工程]