近红外长余辉材料ZnGa2MO6:Cr3+的制备与余辉性能  

Preparations and afterglow properties of near-infrared long-afterglow materials ZnGa2MO6:Cr3+

作　　者：潘再法[1] 严丽萍[1] 邵康 王锴 PAN Zaifa;YAN Liping;SHAO Kang;WANG Kai(College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China)

机构地区：[1]浙江工业大学化学工程学院

出　　处：《浙江工业大学学报》2019年第6期666-671,678,共7页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(10804099);浙江省自然科学基金重点资助项目(LZ18B050002)

摘　　要：采用高温固相法合成了近红外长余辉材料ZnGa2MO6:Cr3+(M=Si,Ge,Sn,Ti)。利用X射线衍射、扫描电子显微镜、荧光光谱、长余辉光谱、余辉衰减曲线和热释光谱等手段,研究了不同金属离子对尖晶石结构、余辉性能以及缺陷分布的影响。结果表明:所得4种材料中ZnGa2GeO6:Cr3+和ZnGa2SiO6:Cr3+的余辉强度显著高于ZnGa2O4:Cr3+,分别是ZnGa2O4:Cr3+的2.6和1.9倍,这与其具有更强的热释峰结果相对应。说明通过引入四价阳离子,可以促进基质中的缺陷形成,提高了近红外长余辉材料的性能。Near infrared long-afterglow materials ZnGa2MO6:Cr3+(M=Si, Ge, Sn, Ti) were synthesized by high temperature solid-state reactions. The effects of different metal ions on structures, afterglow properties and defects distributions of spinel were studied by X-ray diffraction, scanning electron microscopy, photoluminescence spectra, long-afterglow spectra, afterglow decay curves and thermoluminescence spectra. The results showed that the afterglow intensity of ZnGa2GeO6:Cr3+ and ZnGa2SiO6:Cr3+ were 2.6 and 1.9 times stronger than that of ZnGa2O4:Cr3+, respectively, which was consistent with their stronger thermoluminescence peaks. These results indicated that the formation of defects in the matrix can be promoted by introducing tetravalent cations, and thereof the properties of near infrared long-afterglow materials can be improved.

关 键 词：近红外长余辉 尖晶石 缺陷 不等价替换 

分 类 号：O482.31[理学—固体物理]