Microstructure, dielectric properties and diffuse phase transition of barium stannate titanate ceramics

• Published in: Journal of materials science. Materials in electronics 2011-03, Vol.22 (3), p.265-272
• Main Authors: Cai, Wei, Fan, Yize, Gao, Jiacheng, Fu, Chunlin, Deng, Xiaoling
• Format: Article
• Language: English
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Dielectric loss and relaxation; Dielectric properties; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Diffusion; Electric fields; Electronics; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Ferroelectricity and antiferroelectricity; Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties; Materials Science; Microstructure; Optical and Electronic Materials; Phase transformations; Physics; Specific phase transitions; Structural transitions in nanoscale materials; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Tin
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-010-0126-7

BaSn x Ti 1– x O 3 (short for BTS) ceramics are prepared via the conventional solid state reaction method. The microstructures, diffuse phase transiton, dielectric and ferroelectric properties of BTS ceramics were investigated. These results indicate that Sn 4+ ions have entered the unit cell maintaining the perovskite structure of solid solution. The incorporation of SnO 2 can limit grain growth in the BTS ceramics. The Curie temperature of BTS ceramics decreases with the increasing of tin content. Addition of tin can decrease dielectric loss of BTS ceramics at room temperature. The diffuseness of the phase transition of BTS ceramics enhances with the increasing of tin content. The coercive electric field ( E C ) increases as tin content increases when x is 0.10–0.20. Moreover, the remanent polarization ( P r ) of BTS ceramics decreases with the increasing of tin content.