Abstract
Microwave and conventional heating were used to fabricate the potassium strontium niobate (KSN) glass–ceramics. Effects of the heat-treatment methods on the microstructure and charge–discharge properties of the KSN glass–ceramics were investigated. The microstructure results showed the homogeneous and fine grains distributed uniformly in the glass–ceramic crystallized by microwave process. Compared to the sample devitrified by traditional heating, the value of dielectric constant decreased slightly but the dielectric loss reduced obviously at room temperature. And the breakdown strength reached up to 1295.50 kV/cm. The impedance analysis illustrated the activation energy was reduced by microwave heat treatment. For pulsed power applications, a charge–discharge period of 19 ns and a discharge efficiency of 83.3% were obtained in the sample processed through microwave. This work could provide a new heat treatment method for high-performance dielectric capacitors.
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