背景光辐照下SrAl_2O_4:(Eu^(2+),Dy^(3+))的力致发光性能的实验研究  

Mechanoluminescenceproperty of SrAl_2O_4:(Eu^(2+),Dy^(3+))under Background Light Irradiation

作　　者：周文斌 毛启楠[1] 陈志安 季振国[1] 

机构地区：[1]杭州电子科技大学材料与环境工程学院,杭州310018

出　　处：《传感技术学报》2017年第8期1163-1166,共4页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(61372025);2015年大学生科技创新活动计划(新苗人才计划)项目(2015R407034)

摘　　要：SrAl_2O_4:(Eu^(2+),Dy^(3+))作为一种力致发光材料,因其力致发光强度高而受到广泛的关注。但SrAl_2O_4:(Eu^(2+),Dy^(3+))力致发光强度随余辉衰减时间延长而减弱,这一特性阻碍了它在应力传感器中的实际应用。针对这一问题,本文采用小球下落冲击法,研究了背景光照射下SrAl_2O_4:(Eu^(2+),Dy^(3+))长余辉发光材料的力致发光特性。相比无背景光条件下的力致发光,采用的365 nm背景光持续辐照SrAl_2O_4:(Eu^(2+),Dy^(3+)),可以使其力致发光强度不受余辉衰减时间影响,并能够提高力致发光强度及灵敏度。这一结果有助于推动SrAl_2O_4:(Eu^(2+),Dy^(3+))在冲击力传感领域的应用。As a mechanoluminescence( ML) material,SrAl_2O_4:( Eu^(2+),Dy^(3+)) has attracted much attention owing to its strong ML intensity. However,the ML intensity of SrAl_2O_4:( Eu^(2+),Dy^(3+)) decreases with the decay time,which hinders its practical application for stress sensing. To solve this problem,a ball impact technique was employed to study the ML property of SrAl_2O_4:( Eu^(2+),Dy^(3+)) under background lightillumination in this paper. Compared with ML without background illumination,the ML intensity of SrAl_2O_4:( Eu^(2+),Dy^(3+)) irradiated by 365 nm UV-light is notaffected by the decay time,and the intensity and sensitivity of ML are improved,which can promote the application of SrAl_2O_4:( Eu^(2+),Dy^(3+)) in the field of impact sensing.

关 键 词：发光材料 力致发光 背景光辐照 冲击力探测 

分 类 号：TB321[一般工业技术—材料科学与工程] O482.3[理学—固体物理]