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将BaCl2.2H2O和H2O2溶液在NH3.H2O中反应制备出前驱体BaO2.H2O2,再用H2TiO3和前驱体BaO2.H2O2作反应物、KNO3和KOH作溶剂,用熔盐法合成了钛酸钡纳米粒子,用XRD、SEM、TEM、EDS和FT-IR对产品的结构、形貌和成份进行了表征。结果表明,在500～600℃煅烧24h可获得粒径约为25～50nm的立方相钛酸钡纳米粒子,粒子大小分布均匀,形状近似为球形。随着反应温度升高,BaTiO3纳米粒子的晶胞参数减少、粒径增大。另外,还讨论了BaTiO3纳米粒子的形成机理。
The BaCl2.2H2O and H2O2 solutions were reacted in NH3.H2O to prepare BaO2.H2O2 precursors, and then using H2TiO3 and precursor BaO2.H2O2 as reactants, KNO3 and KOH as solvents, the BaTiO3 The structure, morphology and composition of the product were characterized by XRD, SEM, TEM, EDS and FT-IR. The results show that calcined at 500 ~ 600 ℃ for 24 hours to obtain a particle size of about 25 ~ 50nm cubic phase barium titanate nanoparticles, the particle size distribution, the shape is approximately spherical. As the reaction temperature increases, the unit cell parameters of BaTiO3 nanoparticles decrease and the particle size increases. In addition, the formation mechanism of BaTiO3 nanoparticles was also discussed.