摘要
采用溶胶-凝胶和溶胶-沉淀的方法合成了立方相纳米BaTiO3粉体．溶胶-凝胶法制备的粉体平均粒径为19nm，颗粒分布均匀、含少量BaCO3．溶胶-沉淀法得到了纯BaTiO3粉，平均粒径为42nm，存在部分团聚．两种方法相比，溶胶-凝胶法的粉体烧结密度较高，介电性能较好．讨论了两种合成方法的晶粒形成机理及对材料微观结构和介电性能的影响．
Nanocrystallines of BaTiO3 with a cubic phase were synthesized by two methods, sol-gel method and sol-precipitation method. Powders obtained by the sol-gel method was homogeneous and ultrafine (19nm), with a few amounts of BaCO3. Pure crystallines of BaTiO3 with larger grain size of 42nm and some degrees of aggregates were obtained by the sol-precipitation method. The sol-gel powders had higher sintering density and better dielectric property. Mechanisms for the evolution of crystalline BaTiO3 in the sol-gel and the sol-precipitation methods were discussed in the context of microstructure and dielectric properties.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第4期457-462,共6页
Journal of Inorganic Materials
