Abstract
Ba (1− x) Sr x TiO 3 ( x = 0, 0.1, 0.2, 0.3) nanopowders were synthesized from alkoxide solution precursor by sol–gel process. The Ba (1− x) Sr x TiO 3 powders calcined at 800 °C for 2 h were maintained in cubic phase and the cell parameters were in the range of 4.0282–3.9786. The effects of Sr doping and sintering temperature on structure and dielectric characteristics of the Ba (1− x) Sr x TiO 3 ceramics were investigated. The increase of Sr content in the Ba (1− x) Sr x TiO 3 ceramics causes the inhibition of grain growth and downward shift of Curie temperature ( T c). The T c shift rate is 2.5 °C/mol% with increasing Sr content. At T c, the dielectric constants of Ba (1− x) Sr x TiO 3 ceramics increase with the increasing of sintering temperature, and the highest permittivity (7032) is obtained for x = 0.1 sample sintered at 1400 °C.
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