文献类型：期刊文献

中文题名：Li_2SiO_3:Eu^(3+)红色荧光粉的制备与发光性能

英文题名：Synthesis and Luminescence Properties of Li_2SiO_3:Eu^(3+) Red Phosphor

作者：李帅帅[1];李蔚[1];顾金楼[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237

年份：2016

卷号：42

期号：5

起止页码：653

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：Li2Si03:Eu^3+;球磨固相反应法;红色荧光粉

外文关键词：Li2SiO3 ： Eu^3＋ ; ball-grinding solid state reaction; red phosphor

摘要：以LiOH·H_2O、Si(OC_2H_5)_4和Eu(NO_3)_3·6 H_2O为主要原料,采用简单的机械球磨法,在室温下合成了Li_2SiO_3:Eu^(3+)荧光粉前驱体,再经高温灼烧,得到一系列Li_2 SiO_3:x%Eu^(3+)红色荧光粉。研究了灼烧温度、保温时间及Eu^(3+)的物质的量浓度对产物的结构和发光性能的影响。结果表明,当x在1.5~15这个较宽的范围内,随着Eu^(3+)物质的量的增加,Li_2SiO_3:x%Eu^(3+)荧光粉的物相组成保持不变,且直到x值达到12之后,才出现了浓度淬灭现象;当灼烧温度为1173K、保温时间为2h时,荧光材料的发光强度达到最大值。在467 nm激发下,基于Eu^(3+)的~5D_0→~7F_2(615 nm)跃迁,Li_2SiO_3:Eu^(3+)荧光粉发射出强烈的红光。
Li2SiO3 ： Eu^3＋ phosphor precursor was prepared via a simple ball-grinding solid state reaction at room temperature using LiOH · H2 O· Si（OC2 H5 ）4and Eu（NO3 ）3 · 6H20 as raw materials, then after calcination at high temperature, a series of Li2 Si03 ： x% Eu^3＋ red phosphors were obtained. The influences of calcining temperature, dwelling time and Eu^3＋ contents on the structure and luminescent properties of as-prepared phosphors were investigated. The results indicated that the phase composition of Li2 SiO3 ： x%Eu^3＋ did not change with the increase of Eu^3＋ content when x was in the range of 1. 5 to 15, and the concentration quenching phenomenon did not appear until the value of x reached 12. When the calcining temperature was 1 173 K and the dwelling time was 2 h,the luminous intensity of the fluorescent system reached the maximum value. The Li2Si03 ： Eu^3＋ phosphors showed an intense red emission, corresponding to the ^5D0→^7F2（615 nm） transition of Eu^3＋under 467 nm excitation.