摘要
以铝、钕、钇的硝酸盐和尿素为原料,采用尿素均匀沉淀法制备了不同钕掺杂量的Nd∶YAG陶瓷粉体。采用TG-DSC、FT-IR、XRD、SEM和荧光分光光度计分别研究了前驱体的组成以及钕掺杂量对晶相组成、晶粒形貌和光致发光性能的影响规律。结果表明:尿素均匀沉淀法制备的前驱体是由氢氧化物和碳酸盐组成的复合盐。前驱体在1000℃焙烧2h后得到的样品,其晶相组成随钕掺杂量的增加由单一YAG相向YAG、YAM、YAP三相共存发展,颗粒的平均粒径随掺杂量的增加呈增大趋势。荧光发射强度随钕掺杂量的增加呈先增大后减小的变化趋势,在钕掺杂量为1.69%时出现最大值。
Neodymium-doped yttrium aluminum garnet （Nd：YAG） powders with different neodymium contents have been prepared by a precipitation method using urea and nitrate salts of aluminum, neodymium, and yttrium as raw materials. TG-DSC, FT-IR, XRD, SEM and fluorescence speetrophotometry were used to study the precursor composition and the influence of varying neodymium content on the phase composition, morphologies, and luminescence. The results showed that the precursor obtained by the urea method contained both hydroxide and carbonate phases. After sintering at 1000℃ for 2 h, the phase composition of the powder changed with increasing Nd-doped content from a single phase YAG to the coexistence of YAG, yttrium aluminum monoclinic （YAM） and yttrium aluminum perovskite （YAP）. The average particle diameter increased with increasing content of the neodymium dopant. The fluorescence intensity initially increased with increasing Nd content, and then decreased, with the maximum intensity appearing at a Nd content of 1.69 %.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第4期54-59,共6页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
关键词
尿素
均匀沉淀法
钇铝石榴石
钕
掺杂
urea
homogeneous precipitation method
yttrium aluminum garnet
Nd
dopant
