摘要
通过湿化学法合成了表面包覆硬脂酸的钛酸钡纳米复合微粒。通过FT－IR和XPS可以确认有机修饰层的极性基团通过化学键与无机内核结合；虽然BaTiO3结晶形为无定型，但通过Raman和XRD依然可以确定四方相结构，TEM结果显示纳米微粒的尺寸在10－20nm左右。由于有机修饰层的在影响了BaTiO3的成核机理和晶体生长过程中的择优取向。提出了硬脂酸表面有机修饰BaTiO3纳米微粒的形成机理，并给出其结构模型。
The wet-chemical preparation of barium titanate nanocomposites surface-coated with stearate was described. The chemical binding between stearate and metallic cations can be confirmed from both FT-IR and XPS results. Although amorphous BaTiO3 obtained, tetragonal phase of nuclei can be inferred from both XRD and Raman patterns. The particles size is around at 10-20nm determined by TEM morphology. The nucleation and epitaxial growth of crystalline are significantly effected in the presence of organic modifying groups.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第3期590-594,共5页
Journal of Inorganic Materials
