Shengchen Chen

Effects of glass additions on energy storage performance of (Pb0.97La0.02)(Zr0.92Sn0.05Ti0.03)O3 antiferroelectric thick films

50 μm-thick (Pb0.97La0.02)(Zr0.92Sn0.05Ti0.03)O3 antiferroelectric (AFE) thick films with different amount of 0.8PbO–0.2B2O3 glass additions were fabricated by the screen-printing method on alumina substrate, which was pre-coated with Pt as electrode. The effects of glass additions on dielectric properties and energy storage performance were investigated in details. Due to the enhancement of breakdown strength (BDS) of the specimens by the addition of glass, the energy storage performances of the thick films could be greatly improved. As a result, with 3% glass addition, the BDS of the specimens were as high as 475 kV/cm, the maximum polarization of 34.8 μC/cm2 and the maximum recoverable energy storage density of 7.4 J/cm3 were obtained. The results indicated the (Pb0.97La0.02)(Zr0.92Sn0.05Ti0.03)O3 (PLZST) thick films have a promising potential application in capacitors for pulsed power systems.

Effect of excess PbO on the microstructures and electric field induced strain of Pb0.97La0.02(Zr0.63Sn0.26Ti0.11)O3 antiferroelectric ceramics

Microstructures and electrical properties of (Pb0.97La0.02)(Zr0.63Sn0.26Ti0.11)O3 (PLZST) antiferroelectric (AFE) ceramics with different PbO content were investigated in this study. X-ray diffraction analysis showed that with the increase of PbO amount, the stability of AFE phase reduced due to the decrease of lead vacancies. Besides, it was observed that the sintering properties could be improved by adding a small amount of PbO. Further, the electric field induced polarization and strain first increased, and then decreased with increasing PbO addition and they showed good frequency stability at low frequency. The maximum strain of 0.65% was obtained in the specimens with 8 mol% PbO content at the frequency 1 Hz. Both a high strain level and relatively good frequency stability in this composition can make a potential candidate for actuators applications over a wide-frequency working range.