pH值对共沉淀-水热法合成Pr-CeO_2粉体性能的影响(英文)  

EFFECT OF pH VALUE ON PROPERTIES OF Pr-CeO_2 POWDER SYNTHESIZED BY CO-PRECIPITATION-HYDROTHERMAL METHOD

作　　者：朱振峰[1] 贺睿华[1] 李静平[1] 李军奇[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021

出　　处：《硅酸盐学报》2009年第1期125-128,共4页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50772064);温州市科技攻关项目(H20070016)资助。

摘　　要：以Ce(NO_3)_3·6H_2O、Pr_6O_(11)为原料,聚乙二醇为表面分散剂,采用共沉淀剂-水热法制备了Pr-CeO_2纳米粉体。采用X射线衍射仪、比色计、Raman光谱、透射电镜研究了不同pH值对粉体晶体结构、呈色性能和形貌的影响。结果表明:碱性水热环境下,Pr部分溶解于CeO_2晶格。易生成分散性较好的小晶粒。酸性水热环境下,晶粒的发育更完善,晶粒尺寸变大,Pr在CeO_2晶格中的溶解度增大,氧空穴浓度也增大。Pr-CeO_2 nano-powders were prepared by a co-precipitation-hydrothermal method,using Ce(NO_3)_3·6H_2O,Pr_6O_(11)as raw materials and polyethylene glycol(PEG)as additive.The influences of different pH value on the crystallite structure,coloring proper- ties,morphologies and the oxygen vacancies of powders were studied by using X-ray diffraction,colorimeter,laser Raman spectra and transmission electron microscopy.The results show that,in the alkaline hydrothermal medium,praseodymium dissolves partly into the c...

关 键 词：镨掺杂氧化铈 共沉淀-水热法 

分 类 号：TB381[一般工业技术—材料科学与工程]