【摘要】 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。更多还原

【Abstract】 BaNiO3 nanocrystallites were prepared through the sol-gel method,and the average size of the nanoparticles was 40 to 80 nm.The microstructure of BaNiO3 nano-crystallites was characterized 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.更多还原