Preparation of barium strontium titanate Ba1−xSrxTiO3 (0 ⩽ x ⩽ 0.2) single-crystal nanorods by a novel combined method

An ultrasonic irradiation method was applied to the sol/gel synthesis of the single-crystal cubic barium strontium titanate Ba1−xSrxTiO3 (0 ⩽ x ⩽ 0.2). The characteristics of the composites were examined by X-ray diffraction, thermogravimetric analysis, differential thermal analysis, transmission electron microscopy and high-resolution transmission microscopy. The diameters and lengths of typical resultant Ba0.8Sr0.2TiO3 are in the range of 70–100 nm and 650–1000 nm, respectively. In addition, the stoichiometric sonogel formation and its heat-treatment process, the relationship between x of Ba1−xSrxTiO 3 and the crystal structure, the relationship between synthesis condition of sonogel and morphology have been discussed.