乙醇/水混合溶剂热法制备BaHfO_3:Ce超微粒子  

Preparation of BaHfO_3:Ce Ultra-fine Particles by C_2H_5OH/H_2O Mixed Solvolthermal Method

作　　者：苑晓宇[1,2] 马伟民[1] 闻雷[3] 杨化仁[2] 

机构地区：[1]沈阳化工大学材料科学与工程学院辽宁省稀土化学及应用重点实验室,沈阳110142 [2]沈阳大学机械工程学院,沈阳110044 [3]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016

出　　处：《人工晶体学报》2011年第2期486-491,共6页Journal of Synthetic Crystals

基　　金：辽宁省教育厅重点实验室项目(2008S181);辽宁省科技计划项目(2008224001);沈阳市科技计划项目(1081236-1-00)

摘　　要：以Ba（NO3）2和HfOCl2.8H2O为原料,KOH为矿化剂,乙醇/水作溶剂,Ce（NO3）3作为激活剂,在150-220℃和16-36 h的条件下,制备了掺杂Ce^3＋的BaHfO3超微粒子。用XRD,SEM等手段表征了粒子合成过程的物相变化及形貌特征;用荧光光度计分析了样品的激发光谱和发射光谱。结果表明,在n（Ba）∶n（Hf）=1∶1,水热合成温度200℃,保温时间24 h,pH=13.5的条件下制备的BaHfO3∶Ce粒子分散性好,形貌近球形,粒径约52 nm。当掺杂Ce3＋浓度为0.3 mol%时BaHfO3发光效果最佳。The BaHfO3∶Ce ultra-fine particles were prepared by C2H5OH/H2O mixed solvolthermal method,under 150-220 ℃ for 16-36 h using Ba（NO3）2 and HfOCl2·8H2O as raw materials,added KOH aqueous solution as precipitant and Ce（NO3）3 aqueous solution as activator.The phase transformation and the morphology of powders during preparation of BaHfO3∶Ce powders were studied by XRD and SEM.The excitation and emission spectra of samples were analyzed by the fluor-photometer.The results show that the powders are approximately spherical particles with even particle size of about 52 nm and good dispersibility under the condition of n（Ba）∶n（Hf）=1∶1,pH=13.5,treated at 200 ℃ for 24 h.The superior photoluminescence properties were obtained at dopping of 0.3 mol % Ce.

关 键 词：BaHfO3:Ce粒子 水热法 物相变化 光谱特性 

分 类 号：O614.33[理学—无机化学] TQ422[理学—化学]