光照激发对夜光纤维余辉和热释光特性的影响  

Influence of light excitation on afterglow and thermoluminescence characteristics of luminous fiber

作　　者：郭雪峰[1,2] 葛明桥[1] 

机构地区：[1]生态纺织教育部重点实验室(江南大学),江苏无锡214122 [2]常州纺织服装职业技术学院,江苏常州213164

出　　处：《纺织学报》2013年第3期9-14,共6页Journal of Textile Research

基　　金：国家自然科学基金资助项目(21171074/B010201);江苏省高等学校优秀科技创新团队资助计划(苏教科[2009]10号)

摘　　要：研究了光照激发条件对夜光PET纤维余辉和热释光性能的影响,采用长余辉测试仪、微机热释光剂量仪对纤维的余辉衰减规律和热释光性能进行表征。结果表明,光照激发条件对纤维的初始发光亮度和余辉时间产生了影响,但并未呈现线性变化,激发照度变大时,纤维的余辉衰减速度快,衰减到同一发光照度时所用的时间较短,增加激发时间并不能延长材料的余辉时间。光照激发条件不改变SrAl204:Eu2+,Dy3+陷阱能级的深度,却能显著增加原有陷阱能级中的电子浓度。激发光强越大,激发时间越长,热释光的相对强度越大。An investigation into the influence of light excitation conditions on the afterglow and thermoluminescent characteristics of luminescent polyester fiber used afterglow tester and TL dosimeter to characterize the afterglow decay laws and thermoluminescent characteristics of the fiber. The results indicated that light excitation conditions had impacts on the initial intensity and decay time of the fiber, and no linear change was observable. The higher the excitation intensity, the higher the decay speed, and thus it needs shorter decay time for attenuating to the same luminescent illumination. Increasing the excitation time did not prolong the afterglow time of materials. The light excitation conditions did not change the trap level depth of SrAl2O4：Eu^2＋,Dy^3＋ , but increased the electronic concentration of the trap level obviously. The greater the excitation intensity and the longer the excitation time, the higher the relative intensity of thermoluminescent peak.

关 键 词：夜光PET纤维 激发条件 余辉衰减 热释光 

分 类 号：TS151[轻工技术与工程—纺织材料与纺织品设计]