BaNiO_3纳米晶的制备与表征

Preparation and characterization of BaNiO_3 composite nanocrystallites

采用溶胶-凝胶法制备了BaNiO3复合纳米晶,讨论了制备BaNiO3纳米晶的最佳实验条件。X-衍射分析、透射电镜和扫描电镜对其粒径大小及形貌特征进行了表征;研究结果表明,当氯化钡和硝酸镍的物质的量比为6∶5、灼烧温度>500℃、pH为7时形成BaNiO3晶粒,粒度随焙烧温度的升高而增大,温度达到700℃时,晶型趋于完善。

BaNiO3 nanocrystallites were prepared through the solgel method, and the average size of the nanoparticles was 40 to 80 nm. The microstructure of BaNiO3 nano-erystallites was character- ized by the techniques of XRD, TEM and SEM, while the best experimental conditions were also investigated. The results showed that the as-prepared nanoparticles had small size, with a narrow size distribution when the ratio of BaCl2 ： NiNO3 was equal to 6： 5, with the calcination temperature exceeding 500 ℃ and acidity equating to 7. The average particle size increases with an increasing calcination temperatures.