Preparation of Barium Strontium Titanate Powder with Controllable Morphology by High-Gravity and Hydrothermal Method

Zero-dimensional and multidimensional structures of barium strontium titanate（Ba1-xSrx TiO3, BST） powders have the advantages of high specific surface area and high aspect ratio, respectively. To improve the material properties, expand the industrial application of raw materials in electronic components and improve the uneven distribution and long time in the preparation process of powder, BST powder with glycerol were prepared by impinging stream-rotating packed bed（IS-RPB） combined hydrothermal method. The effects of hydrothermal temperature, hydrothermal time and the amount of glycerol added to the morphology of BST powder were investigated. The morphology, crystal phase and composition of BST powder were characterized by X-ray diffractometer（XRD）, scanning electron microscope（SEM） and transmission electron microscope（TEM）. The results show that under the conditions of supergravity factor of 40, initial impact velocity of 10. 61 m/s, hydrothermal temperature of 180 ℃ and hydrothermal time of 12 h, when a small amount of glycerol is added, it acts as a dispersant, and the BST powder is prepared as nano spherical particles with good uniformity and dispersion. When more glycerol is added, it acts as a solvent and grew along the unit crystal surface under hydrothermal conditions to obtain flake and flower-like morphology. In this paper, the high-gravity hydrothermal method and the addition of glycerol have explored a convenient and fast way for the preparation of BST powder with controllable morphology in industrial industry.