Abstract
Abstract Ba 0.985 Bi 0.01 TiO 3 –BaTi 1− x Sn x O 3 powders were synthesized by a two-step soft chemical method. Ceramics with core–shell structure could be easily obtained by using these uniformly distributed powders. The ceramics not only satisfied the requirement of EIA-X8R specification, but also were near to that of EIA-X9R specification. Microstructural evaluation conducted by X-ray diffraction and scanning electron microscopy confirmed the hierarchical structure of the ceramic grains. The shape of the e – T curves near the dielectric peak became broad when x increased from 0.001 to 0.02. The permittivity of Ba 0.985 Bi 0.01 TiO 3 –BaTi 0.98 Sn 0.02 O 3 ceramic was ∼23,000, Δ C / C 20 °C was −15%, 14.4% and −15% at −55 °C, 120 °C and 170 °C, respectively, and the dielectric loss was 0.5. The results showed that the content of Sn had a strong impact on the diffusion and the dielectric properties of the ceramics.
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