新型应力发光材料Ca_(5)Ga_(6)O_(14):Sm^(3+)制备及其性能  

Preparation and Properties of a Novel Mechanoluminescent Material Ca_(5)Ga_(6)O_(14):Sm^(3+)

作　　者：王强 刘伟 杜玉松[1,2] 李欢 张志军 饶光辉 程帅[1,2] 赵景泰 WANG Qiang;LIU Wei;DU Yusong;LI Huan;ZHANG Zhijun;RAO Guanghui;CHENG Shuai;ZHAO Jingtai(School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China;School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]桂林电子科技大学广西信息材料重点实验室,广西桂林541004 [3]桂林电子科技大学机电工程学院,广西桂林541004

出　　处：《发光学报》2024年第6期959-969,共11页Chinese Journal of Luminescence

基　　金：广西科技基地和人才专项(2020AC18005);广西研究生教育创新计划项目(YCSW2022267);广西中央引导地方科技发展基金(ZY22096009);广西八桂学者基金资助项目。

摘　　要：采用高温固相法成功制备出新型Ca_(5-x)Ga_(6)O_(14):xSm^(3+)应力发光材料。通过X射线衍射、扫描电镜、漫发射光谱、光致激发和发射光谱、荧光衰减曲线、应力发光光谱和热释光光谱等测试详细研究了Ca_(5-x)Ga_(6)O_(14):xSm^(3+)的晶体结构、表面形貌、光致发光和应力发光性能及其发光机理。在404 nm激发下,Ca_(5-x)Ga_(6)O_(14):xSm^(3+)呈现出4个发射峰,分别位于562,599,642,715 nm,对应Sm^(3+)的^(4)G_(5/2)→6Hj(j=5/2,7/2,9/2,11/2)的特征发射。随着Sm^(3+)离子掺杂浓度的增加,发光强度先增强后减弱,在x=0.07时获得最强发射,且衰减时间从1.92 ms缩短至1.30 ms。在滑动摩擦激发下可获得Ca_(5-x)Ga_(6)O_(14):xSm^(3+)的应力发光发射带,且应力发光强度与施加应力满足线性增长,表明该材料在应力传感领域具有潜在应用价值。A novel Ca_(5-x)Ga_(6)O_(14):xSm^(3+)mechanoluminescent(ML)material was successfully prepared by high-temperature solid-state reaction method.The crystal structure,surface morphology,photoluminescence,ML properties and luminescence mechanism of Ca_(5-x)Ga_(6)O_(14):xSm^(3+)were investigated via X-ray diffraction(XRD),scanning electron microscopy(SEM),diffuse reflection spectra,photoluminescence excitation and emission spectra,luminescence decay,ML spectra and thermoluminescence spectra.Under the excitation of 404 nm,the emission peaks at 562,599,642,715 nm are detected in Ca_(5-x)Ga_(6)O_(14):xSm^(3+),corresponding to^(4)G_(5/2)→6Hj(j=5/2,7/2,9/2,11/2)characteristic emission of Sm^(3+).With the increase of Sm3+content,the luminescence intensity first increases and then decreases,the optimal luminescence intensity is obtained at x=0.07 and the decay time decreases from 1.92 ms to 1.30 ms.Under the sliding friction,ML emission band is obtained in Ca_(5-x)Ga_(6)O_(14):xSm^(3+),and the ML intensity increases linearly with applied stress,indicating that the material has potential application in the field of stress sensors.

关 键 词：应力发光 Ca_(5)Ga_(6)O_(14) Sm^(3+) 

分 类 号：O482.31[理学—固体物理]