Optimized microstructure and energy-storage density of Sm2O3-added lead-free borate glass–ceramic composites
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Lead-free borate glass–ceramic composites added with Sm2O3 were synthesized through melt-quenching followed by controlled crystallization techniques. The structural and dielectric properties were characterized. The addition of 0.5 mol% Sm2O3 to the glass ceramics changed the dielectric permittivity and breakdown strength remarkably. The maximum theoretical energy density of 8.15 J/cm3 was achieved in the glass–ceramic with 0.5 mol% Sm2O3, which was improved by 2.6 times as compared with that of the pure glass–ceramic, suggesting dielectric glass–ceramic composite of this composition could be the most attractive candidate for high energy density capacitors.
KeywordsDielectric Constant Sm2O3 Dielectric Loss Ceramic Composite Borate Glass
The authors would like to acknowledge funding from National Natural Science Foundation of China (51162002) and Science and Technology Project of Guangxi Returned Personnel (2012-250).
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