溶胶-凝胶法制备钙钛矿结构(Ca_(0.61),Nd_(0.26))TiO_3纳米粒子(英文)  

Synthesis of Perovskite Structure (Ca_(0.61), Nd_(0.26))TiO_3 Nanopaticles by Sol-Gel Method

作　　者：吴飞[1] 张启龙[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《稀有金属材料与工程》2010年第S2期122-125,共4页Rare Metal Materials and Engineering

基　　金：Important Program of Zhejiang Province (2006C11119)

摘　　要：采用溶胶-凝胶法合成了(Ca0.61,Nd0.26)TiO3纳米粒子。为解决纳米粒子的分散性问题,采用聚丙烯酸铵作为表面活性剂。干凝胶在500°C热处理1h,升温速率为2oC/min,所获得的粉体的XRD图谱显示纯净的正交GdFeO3型钙钛矿结构主相。粉体呈规则的四方形,粒度为50-70nm。当热处理的升温速率为5oC/min时,在非晶的基体上可以看到大量的晶核。升温速率进一步提高到8oC/min时,粉体基本以非晶的形式存在。(Ca0.61, Nd0.26)TiO3 nanoparticles were synthesized by sol-gel method. In order to alleviate aggregation, ammonium polyacrylate was employed as dispersant. When the xerogel was heat-treated at 500 ℃ for 1 h with a heating rate 2 ℃/min, the X-ray diffraction pattern of the powder showed the presence of the orthorhombic GdFeO3 type perovskite phase without any other impurity phase. Moreover, the tetragonal structure particles were obtained with an average size of 50-70 nm. Micro-nanocrystal cores were observed on the substrate of noncrystal at a heating rate of 5 ℃/min. With the heating rate up to 8℃/min, no conspicuous crystal phase was observed.

关 键 词：纳米粒子 溶胶-凝胶 钙钛矿结构 

分 类 号：TB383.1[一般工业技术—材料科学与工程]