Ca-Si-Al-O玻璃合成Ca-α-SiAlON:Eu荧光粉及其发光性能研究  

Preparation and Luminescence Properties of Ca-α-SiAlON:Eu Phosphors from Ca-Si-Al-O Glass

作　　者：汤云[1] 何杰[1] 张雪萍[1] 田朋芳 张思思[1] 薛沛[1] 

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055

出　　处：《人工晶体学报》2017年第8期1564-1568,共5页Journal of Synthetic Crystals

基　　金：陕西省教育厅专项科研计划(15JK1421);2016年省级大学生创新创业训练计划项目(1244)

摘　　要：以Ca-Si-Al-O玻璃为主要原料,通过添加Eu_2O_3,采用碳热还原氮化法合成出Ca-α-Si Al ON∶Eu荧光粉体。借助X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见分光光度计和荧光分光光度计等手段,对合成Ca-α-Si Al ON∶Eu的物相组成、显微结构及发光性能进行表征。结果表明:(1)以Ca O,Al_2O_3,Si O_2为原料,合成的Ca-SiAl-O非晶玻璃具有Si O4四面体与Al O4四面体相互连接的架状结构;(2)以Ca-Si-Al-O玻璃为主要原料,通过添加Eu_2O_3,在1450℃碳热还原氮化合成出呈棱柱状形貌的Ca-α-Si Al ON粉体,其中Eu离子在Ca-α-Si Al ON中实现了良好的固溶;(3)合成的Ca-α-Si Al ON∶Eu在紫外-可见光部分具有较强的吸收,在420 nm的激发下,发射光谱的峰值波长为~570 nm,实现了黄绿光发射,归属于Eu^(2+)的4f^65d-4f^7跃迁。Ca-α-SiAlON：Eu phosphors were synthesized from Ca-Si-Al-O glass with the addition of Eu2O3 by carbothermal reduction nitridation（ CRN） method. The phase composition,microstructure and luminescence properties of the obtained Ca-α-SiAlON ：Eu were investigated by X-ray Diffractometer（ XRD）,Scanning Electron Microscope（ SEM）,UV-Vis spectrophotometer and fluorescent spectrophotometer. The results show that：（ 1） The chemical structure of Ca-Si-Al-O glass prepared from Ca O,Al2O3 and SiO2 can be generally described as frame structure of Si O4 tetrahedra branched with Al O4 tetrahedra;（ 2） Ca-α-SiAlON doping with Eu ion with prismatic morphology are prepared at 1450 ℃ from Ca-Si-Al-O glass with the addition of Eu2O3 by CRN;（ 3） The obtained Ca-α-SiAlON：Eu has high adsorption in the UV-visible spectral region. Under the excitation of 420 nm,the Ca-α-SiAlON：Eu exhibited an intense greenish yellow emission centered at 570 nm,which is attributable to the allowed 4f^65d-4f^7 transition of Eu^2＋.

关 键 词：Ca-Si-Al-O玻璃 碳热还原氮化法 Ca-α-SiAlON:Eu荧光粉 发光性能 

分 类 号：TQ422[化学工程]