均匀共沉淀法合成纳米Gd2O3：Eu粉体及其发光特性  

Homogeneous co-precipitation synthesis and photoluminescence properties of Gd_2O_3:Eu nanoparticles

作　　者：刘志刚[1,2] 孙旭东[1] 李晓东[1] 连景宝[1] 

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110004 [2]河北理工大学材料学院,河北唐山063009

出　　处：《材料与冶金学报》2009年第2期110-113,共4页Journal of Materials and Metallurgy

基　　金：国家杰出青年基金资助(50425413);国家自然科学基金资助(50672014)

摘　　要：以六次甲基四胺(hexamethylenetetramine,(CH2)6N4,HMT)为沉淀剂,在GdCl3和EuCl3混合溶液中,利用均匀共沉淀法制得了纳米颗粒.结果表明,获得的Gd2O3:Eu纳米颗粒近似为球形,尺寸均匀,平均粒径为100 nm,且每个球形颗粒由平均粒径为20 nm的微晶聚并而成.Gd2O3:Eu荧光粉在波长612 nm的红光发射来自Eu3+的5D0-7F2电偶极跃迁,发光强度随煅烧温度提高而增强,随Eu3+掺杂摩尔分数的提高而增强.Eu3+掺杂摩尔分数超过7%时,发生浓度淬灭,发光强度减弱.Gd2O3 ： Eu nanoparticles were synthesized by a homogeneous co-precipitation method using hexamethylenetetramine（ （CH2 ） 6N4, HMT） as the precipitant in GdCl3 and EuCl3 blended solution. The results show that Gd2O3 ：Eu nanopartides are almost spherical and uniform in particle size with an average particle diameter of about 100 nm. Each spherical nanoparticle is composed of the aggregation of small crystallites of about 20 nm in size. The intensity of red light emission （612 nm） originated from the 5D0 -7122 electric -dipole transition of Eu^3＋ ion increases with increasing calcination temperature and Eu^3＋ doping molar fraction. Concentration quenching occurs when the Eu^3＋ doping molar fraction exceeds 7mol% , leading to the decrease of intensity of red light emission.

关 键 词：氧化钆 六次甲基四胺 纳米颗粒 光致发光 荧光粉 

分 类 号：TM204.4[一般工业技术—材料科学与工程]