Abstract

(Na0.5Bi0.5)TiO3 lead-free thick films were successfully fabricated on alumina substrates via a screen printing method with 0–10 wt% BaO–B2O3–SiO2 glass addition. Microstructure, dielectric properties and energy-storage performance of the thick films were systematically investigated. The results show that the denser thick films were obtained by addition of glass. Thus, the breakdown strength, the energy-storage density and efficiency were greatly improved. The maximum recoverable energy-storage density and efficiency of sample with 1 wt% glass were 2.0 J/cm3 and 44.1 %, respectively. Meanwhile, a low leakage current density of about 10−6 A/cm2 was obtained for all samples at 100 kV/cm.

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