Structural and Luminescent Properties of Mg_(0.25-x)Al_(2.57)O_(3.79)N_(0.21):xMn^(2+)Green-Emitting Transparent Ceramic Phosphor  

作　　者：郝留成 MIAO Xiaojun LI Kai ZHONG Jianying 涂兵田 YANG Zhangfu 王皓 HAO Liucheng;MIAO Xiaojun;LI Kai;ZHONG Jianying;TU Bingtian;YANG Zhangfu;WANG Hao(Pinggao Group Co.,Ltd,Pingdingshan 467001,China;State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;Hubei Longzhong Laboratory,Xiangyang 430070,China;School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]Pinggao Group Co.,Ltd,Pingdingshan 467001,China [2]State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China [3]Hubei Longzhong Laboratory,Xiangyang 430070,China [4]School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第3期533-540,共8页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.52272072);the Independent Innovation Projects of the Hubei Longzhong Laboratory(No.2022ZZ-13)。

摘　　要：A series of spinel-type Mg_(0.25-x)Al_(2.57)O_(3.79)N_(0.21):xMn^(2+)(MgAlON:xMn^(2+))phosphors were synthesized by the solid-state reaction route.The transparent ceramic phosphors were fabricated by pressureless sintering followed by hot-isostatic pressing(HIP).The crystal structure,luminescence and mechanical properties of the samples were systematically investigated.The transparent ceramic phosphors with tetrahedrally coordinated Mn^(2+)show strong green emission centered around 515 nm under blue light excitation.As the Mn^(2+)concentration increases,the crystal lattice expands slightly,resulting in a variation of crystal field and a slight red-shift of green emission peak.Six weak absorption peaks in the transmittance spectra originate from the spin-forbidden ^(4)T_(1)(^(4)G)→^(6)A_(1) transition of Mn^(2+).The decay time was found to decrease from 5.66 to 5.16 ms with the Mn^(2+)concentration.The present study contributes to the systematic understanding of crystal structure and properties of MgAlON:xMn^(2+)green-emitting transparent ceramic phosphor which has a potential application in high-power light-emitting diodes.

关 键 词：transparent ceramic phosphor green emission MGALON PHOTOLUMINESCENCE 

分 类 号：TQ174.758.23[化学工程—陶瓷工业] TQ422[化学工程—硅酸盐工业]