摘要
采用聚合物前驱体法制备了超细Ce-Zr-Ba复合氧化物粉体,用XRD、TEM、BET和TG-DTA技术研究了合成的粉体的组成结构,晶粒大小、比表面和孔分布情况.结果表明,该粉体平均粒径<50nm,经600℃焙烧4h后该粉体的比表面为118.6m^2/g,经800℃高温焙烧4h后比表面仍高达87.4m^2/g,经1000℃高温处理后,粉体仍能保持纳米级,且分散性好,由于该粉体的高热稳定性和高比表面性能,可用作汽车尾气三效催化剂的耐高温保护性涂层材料.
Ultrafine powder of Ce-Zr-Ba mixed oxide was prepared with a macromolecule surface modified method. The typical structure, particle size, surface area and pore structure of the powder were investigated by TEM, XRD, BET and TG-DTA technologies. The results show that the Ce-Zr-Ba mixed oxide powder is nano-sized with the particle size of 50nm, and a high surface area of 119.0m(2)/g at the calcination of 600degreesC for 4h. The surface area of the powder remains 87.4m(2)/g even calcination at 800degreesC for 4h. After calcination at 1000degreesC for 4h, it will keep good particle distribution and in nano-sized properties. This powder can be used as the material in three way catalyst (TWC) for its novel character of resistance high temperature and high surface area.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第3期661-665,共5页
Journal of Inorganic Materials
关键词
铈锆固溶体
超细粉体
高比表面
耐高温材料
Ce-Zr solid solution
ultrafine powder
high surface area
material of resistance high temperature
