碱土金属长余辉材料的耐酸碱性研究  

Study on Acid and Alkali Resistance of Alkaline Earth Metal Long Afterglow Materials

作　　者：周聪[1] 钱欣欣[1] 葛明桥[1] 

机构地区：[1]江南大学生态纺织教育部重点实验室,无锡214122

出　　处：《材料导报》2012年第18期26-29,共4页Materials Reports

基　　金：国家自然科学基金(21171074)

摘　　要：分别对发光性能最好的铝酸盐基质长余辉材料SrAl2O4∶Eu2+,Dy3+与硅酸盐基质长余辉材料Sr2MgSi2O7∶Eu2+,Dy3+进行酸、碱处理(以HNO3和NaOH为例),研究其耐酸碱性能。XRD、SEM、激发光谱、发射光谱以及余辉特性测试的结果表明:SrAl2O4∶Eu2+,Dy3+及Sr2MgSi2O7∶Eu2+,Dy3+经酸、碱处理后物相发生了部分改变,其激发与发射光谱的强度随着酸碱度的增大而降低,但峰形与峰位没有改变;SrAl2O4∶Eu2+,Dy3+经酸碱处理后表面变得更不平整,棱角变得不明显;SrAl2O4∶Eu2+,Dy3+经酸处理后的初始亮度为未处理时的39.2%,经碱处理后的初始亮度为未处理时的14.0%;Sr2MgSi2O7∶Eu2+,Dy3+经酸碱处理后晶体的结构、形貌、表面及余辉衰减情况基本无变化。SrAl2O4：Eu^2＋,Dy^3＋ and Sr2 MgSi2O7：Eu^2＋,Dy^3＋were treated by acid or alkali in order to study the acid and alkali resistance of SrAl2O4：Eu^2＋,Dy^3＋ and Sr2 MgSi2O7：Eu^2＋,Dy^3＋. Take HNO3 and NaOH for an example. Through analyzing the results of XRD, SEM, excitation spectra, emission spectra and afterglow decay curve, it is indicated that the crystal structures of SrAl2O4：Eu^2＋,Dy^3＋ and Sr2 MgSi2O7：Eu^2＋,Dy^3＋ vary in part af- ter being treated by HNO2 or NaOH. The shape and position of peaks in excitation and emission spectra keep almost no change, but the intensity of excitation and emission spectra decline along with the increase of acidity-alkalinity. The surface of SrAl2O4：Eu^2＋,Dy^3＋ after being treated by HNO3 or NaOH becomes uneven and the edges become unob- vious. The initial brightness of SrA1204 ： Euz＋ , Dy3＋ after being treated by HNO3 is 39. 20/oo of that of SrAl2O4：Eu^2＋,Dy^3＋ untreated, and the initial brightness of SrA1204 ： Eu2＋ ,Dy3＋ after being treated by NaOH is 14.0% of that of SrAl2O4：Eu^2＋,Dy^3＋ untreated. The crystal structure, sharp and surface, afterglow decay of Sr2 MgSi2O7：Eu^2＋,Dy^3＋ keep almost no change.

关 键 词：SrAl2O4∶Eu2+ DY3+ Sr2MgSi2O7∶Eu2+ DY3+ HNO3 NaOH耐酸碱性 

分 类 号：TS941.498[轻工技术与工程—服装设计与工程]