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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．
The surface-coated stearic acid-containing barium titanate nanocomposite particles were synthesized by wet chemical method. It was confirmed by FT-IR and XPS that the polar group of the organic modified layer was bound to the inorganic core by a chemical bond. Although the BaTiO 3 crystal was amorphous, the tetragonal phase structure was still confirmed by Raman and XRD. The TEM result showed that the size of the nanoparticle In about 10 ~ 20um. The existence of organic modification affected the nucleation mechanism of BaTiO3 and the preferred orientation during the crystal growth. The formation mechanism of organic modified BaTiO3 nanoparticles on stearic acid surface was proposed and its structure model was given.