【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结晶形态为无定型,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１０~２０ｕｍ左右．由于有机修饰层的存在影响了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．更多还原

【Abstract】 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.更多还原