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

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.