纳米β-BiNbO_4粉体的低温合成  

LOW-TEMPERATURE SYNTHESIS OF NANO β-BiNbO_ 4 POWDER

作　　者：王宁[1] 李蔚[1] 赵梅瑜[1] 殷之文[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《硅酸盐学报》2003年第7期625-628,共4页Journal of The Chinese Ceramic Society

摘　　要：对低温合成纳米 β BiNbO4粉体进行了研究。以Bi和Nb的柠檬酸盐为初始原料 ,采用溶胶凝胶法 ,通过控制适当的 pH值、温度等条件 ,可在 60 0℃的低温下热分解获得高温相 β BiNbO4纳米粉体 ,比普通固相法采用的温度低 40 0℃左右。用红外光谱 ,热重差热分析 ,X射线衍射 ,液氮吸附法以及透射电镜等手段来表征BiNbO4的柠檬酸盐前驱体及煅烧后粉体的各项特性。结果表明 :用柠檬酸盐溶胶凝胶法制得的 β BiNbO4粉体平均粒径约 75nm ,比表面积达 12 .42m2 /g。对形成 ββ-BiNbO4 powder with nanometer size (=75 nm) particles was prepared by the sol-gel technique using Bi-citrate and Nb-citrate as the starting precursors. The crystalline phase of β-BiNbO4 can be obtained by the thermal decomposition of citrate complex precursors at a low temperature of 600°C, which is about 400°C lower than that of common solid-state reaction process. Infrared spectrum, thermo-gravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) technique and transmission electron microscopy (TEM) were used to characterize the properties of the citrate precursors and the calcined powders. The results show that the average particle size of β-BiNbO4 powder obtained by the citrate sol-gel technique is about 75 nm, and the specific surface area is 12.42 m2/g. The synthesis process and the forming mechanism are also discussed briefly.

关 键 词：β—铌酸铋 微波介质 化学合成 纳米 

分 类 号：TQ174[化学工程—陶瓷工业]