MSnO_3(M=Ca和Ba)纳米晶不同合成方法对其成相温度的影响  

Influences of Different Routes on Crystallization Temperature in Syntheses of MSnO_3 (M=Ca and Ba) Nanocrystals

作　　者：钱东[1] 龚本利[1] 汪璐[1] 卢周广[1] 黄可龙[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《稀有金属》2005年第3期374-376,共3页Chinese Journal of Rare Metals

基　　金：粉末冶金国家重点实验室开放课题(200506123105A)

摘　　要：分别采用共沉淀法和溶胶凝胶法制备了钙钛矿结构的MSnO3(M=Ca和Ba)纳米晶。研究发现,在共沉淀法的制备过程中,CaSnO3成相的焙烧温度须高于BaSnO3;而在溶胶凝胶法制备过程中,情况正好相反。从反应机制和物质本征结构两方面对此进行了讨论。MSnO_3 (M=Ca and Ba) nanocrystals with perovskite structure were synthesized by a co-precipitation route and a sol-gel route, respectively. It is found that the crystallization temperature of CaSnO_3 is higher than that of BaSnO_3 in their co-precipitation preparations. However, the situation is reversed in their sol-gel preparations. Probable explanation is given in terms of the related reaction mechanism and material′s characteristic structures.

关 键 词：MSnO3(M=Ca和Ba)纳米晶 共沉淀 溶胶-凝胶 钙钛矿结构 成相温度 

分 类 号：TN304[电子电信—物理电子学]