Abstract
The (BaO, Na2O)–Nb2O5–SiO2 glass-ceramics with various amounts of La2O3 addition, were fabricated through melt casting followed by controlled crystallization. The effect of La2O3 addition on the phase transition, microstructure, and dielectric properties for (BaO, Na2O)–Nb2O5–SiO2 glass-ceramics was investigated. With the addition of La2O3, the dielectric constant and the breakdown strength for the glass-ceramics were drastically improved, which resulted in the improvement of the discharged property. The maximum energy-storage density of 8.4J/cm3 was achieved in the niobate glass-ceramics with 0.5% La2O3 addition, indicating that the glass-ceramic with this composition is a promising dielectric material for high energy storage density capacitors.
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