中文摘要：

采用溶胶–凝胶法制备了BaTiO3溶胶,并在BaTiO3纳米粉体表面原位包覆一层均匀的同质溶胶。表征了包覆的BaTiO3纳米粉体的性能,研究了包覆量和烧结温度对包覆样品相对密度的影响。结果表明：在BaTiO3纳米粉体表面原位包覆了一层5～6nm厚的同质均匀溶胶。包覆量为BaTiO3粉体质量的3.0%时包覆效果最佳;1260℃烧结的包覆粉体样品,较未包裹的BaTiO3粉体具有更高的相对密度,前者为96.48%,而后者仅为75.40%。包覆粉烧结体断面致密,而原始粉烧结体断面则有明显气孔。

英文摘要：

A smooth and uniform BaTiO3 sol was prepared via sol–gel method and the surface of BaTiO3 nano-powder is in situ evenly coated with a homogeneous BaTiO3 sol layer. The properties of the coated powder samples were characterized. The effects of the coated amount of BaTiO3 sol and sintering temperature on the relative density of the coated powder sample were investigated. The results show that the surface of BaTiO3 nano-powder has a uniform homogeneous BaTiO3 sol layer with 5–6 nm thickness. The coating result is best when the amount of BaTiO3 sol is 3.0% in mass and the sintering temperature is 1 260 ℃ . Relative density of the sample with the coated powder sintered at 1 260 ℃ is 96.48%, much higher than that of the uncoated one which is 75.40%. The sample of coated BaTiO3 sol powder is dense, whereas the sintered sample of the original powder is obviously porous.