摘要
以铌柠檬酸盐、乙酸钡和钛酸正四丁酯为原料,采用溶胶-凝胶法,通过控制反应条件,在700℃的温度下获得Ba3Ti4Nb4O21纳米粉体,比采用普通固相法合成的温度低400℃左右。用红外光谱,差热-热重,X射线衍射以及透射电镜等手段表征Ba3Ti4Nb4O21柠檬酸盐前驱体以及煅烧后粉体的各项特性。结果表明:用柠檬酸盐溶胶-凝胶法制得的前驱体在700℃煅烧2h后,可获得纯Ba3Ti4Nb4O21纳米粉体,其平均粒径在30～50nm,适合于微波介质陶瓷的制备。
Ba3Ti4Nb4O21 powder was prepared by sol-gel technique using Nb-citrate, Ba(CH3COO)2 and C16H36O4Ti as raw materials. The crystalline phase of Ba3Ti4Nb4O21 can be obtained at 700 oC, which is about 400 oC lower than that of common solid-state reaction process. Infrared spectrum, thermo-gravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to characterize properties of the citrate precursors and the calcined powders. The results show that pure Ba3Ti4Nb4O21 powder with particle size of 30-50 nm are obtained from precursor gel calcined at 700 oC for 2 h.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2010年第S2期380-382,共3页
Rare Metal Materials and Engineering
基金
浙江省重大科技攻关项目资助(2006C11119)
