Eu^(3+)掺杂羟基磷灰石的制备及其发光性质  

Preparation and Luminescent Properties of Eu^(3+)-Doped Hydroxyapatite

作　　者：尹兆益[1] 宋志国[1] 周大成[1] 杨正文[1] 杨宁[1] 王荣飞[1] 邱建备[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《硅酸盐学报》2011年第1期110-113,共4页Journal of The Chinese Ceramic Society

基　　金：教育部博士点基金(200806740004);云南省自然科学基金(2008036E);云南省教育厅自然科学基金(08Y0064)资助项目

摘　　要：采用沉淀法制备了Eu3+掺杂的羟基磷灰石(hydroxyapatite,HAP),用荧光光谱、X射线衍射和扫描电镜等测试手段对所得样品进行了表征。结果表明:Eu3+的发光特性以及其占据HAP晶格中Ca(Ⅱ)和Ca(Ⅰ)位点的比例随Eu3+掺杂浓度和烧结温度改变而变化;随着Eu3+掺杂量的增加,Eu3+掺杂HAP的红光发光强度先增加后降低;当Eu3+掺杂浓度为7%(摩尔分数,下同)时,发光强度达到最大,Eu3+主要占据HAP晶格中的Ca(Ⅰ)位点;当Eu3+掺杂量增加至10%时出现浓度淬灭,发光强度降低,而Eu3+占据HAP晶格中的Ca(Ⅱ)位点的比例大幅增加。另外,随着烧结温度的提高,Eu3+掺杂HAP的红光发光强度逐渐增加,Eu3+占据HAP晶格中Ca(Ⅱ)位点的比例也逐渐增大。The Eu^3＋-doped hydroxyapatite（Eu-HAP） powder was prepared by a precipitation method.The powder samples were characterized by photoluminescence spectra,X-ray diffraction and scanning electron microscope.The results show that the luminescence properties of Eu-HAP and the ratio of Eu^3＋ occupying Ca（Ⅱ） and Ca（Ⅰ） sites of HAP crystal are affected by both doped Eu^3＋ content and sintering temperature.The luminescence intensity of Eu-HAP reached the maximum when the content of doped Eu^3＋ was 7%（mole fraction,the same as below）,and the most of Eu^3＋ occupied the sites Ca（Ⅰ） in HAP crystal.However,the luminescence inten-sity decreased when the doped Eu^3＋ content was 10%,and the ratio of Eu^3＋ occupying the Ca（Ⅱ） sites in HAP crystal increased.Moreover,the luminescence intensity of Eu-HAP and the ratio of Eu^3＋ occupying Ca（Ⅱ） sites in HAP crystal increased with increasing sintering temperature.

关 键 词：羟基磷灰石 铕 发光 沉淀法 

分 类 号：TQ174[化学工程—陶瓷工业]