Co-Modification of Ba5NdTi3Ta7O30 Dielectric Ceramics by Substitution and Introducing Secondary Phase |
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Authors: | X.H. Zheng X.M. Chen |
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Affiliation: | (1) Department of Materials Sciences & Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China |
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Abstract: | Co-modification of Ba5NdTi3Ta7O30 dielectrics ceramics was investigated through Pb substitution for Ba and introducing Bi4Ti3O12 secondary phase. The dielectric constant increased from 150 to 283, the temperature coefficient of the dielectric constant decreased from –2500 ppm/°C to –1279 ppm/°C, and the dielectric loss decreased to 0.0007 at 1 MHz. Meanwhile, the bi-phase ceramics were investigated to achieve temperature stable ceramics with high dielectric constant and low dielectric loss. As the composition x varied from 0.4 to 0.7 for (1 – x)(Ba0.8Pb0.2)5NdTi3Ta7O30/xBi4Ti3O12, the temperature coefficient of the dielectric constant changed from negative to zero to positive. |
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Keywords: | tungsten-bronze Ba5NdTi3Ta7O30 Bi4Ti3O12 dielectric properties |
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