Structure and dielectric properties of BaO–B2O3–ZnO–[(BaZr0.2Ti0.80)O3]0.85 − [(Ba0.70Ca0.30)TiO3]0.15 glass–ceramics for energy storage
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Alkali-free [0.10 BaO + 0.4 B2O3 + 0.5 ZnO], [0.3 BaO + 0.6 B2O3 + 0.1 ZnO] glass powder materials were mixed with [(BaZr0.2Ti0.80)O3]0.85 − [(Ba0.70Ca0.30)TiO3]0.1—BZT–BCT ceramic materials for energy density storage capacitor applications. Calcined (1,250 °C/10 h) BZT–BCT ceramic powder materials were mixed with (15 wt. %) two different glass compositions of [0.10 BaO + 0.4 B2O3 + 0.5 ZnO], [0.3 BaO + 0.6 B2O3 + 0.1 ZnO] separately and were ground using low energy ball milling for 2 h at 400 rpm. The ball milled powders were made into discs having 13 mm diameter and 0.5 mm thickness using hydraulic press (2 ton) and sintered at 900 °C for 2 h. Both the compositions have shown dielectric breakdown field strength ~260, 280 kV/cm and energy density values ~1.118 and 0.50 J/cm3.
KeywordsB2O3 Barium Strontium Titanate Energy Storage Density High Breakdown Voltage Pure BaTiO3
This work was supported by the NSF award grant #1038272. The authors are also thankful to Cristina Diaz Borrero, Material Characterization Center, University of Puerto Rico for doing SEM measurements.
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