首页|(162932)Effect of holding time on microstructure, ferroelectric and energy-storage properties of Pb_(0.925)La_(0.05)Zr_(0.95)Ti_(0.05)O_3@SiO_2 ceramics
(162932)Effect of holding time on microstructure, ferroelectric and energy-storage properties of Pb_(0.925)La_(0.05)Zr_(0.95)Ti_(0.05)O_3@SiO_2 ceramics
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NSTL
Elsevier
Antiferroelectric materials are considered promising energy storage materials because they have excellent energy density during the antiferroelectric phase transition. Herein, Pb_(0.925)La_(0.05)Zr_(0.95)Ti_(0.05)O_3@SiO_2 (PLZT@SiO_2) core-shell structure ceramic materials were synthesized by combing sol-gel method with conventional solid-phase method. The effect of holding time (3 h, 6 h, 9 h, 12 h) on the electrical properties and energy storage properties of PIZT@SiO_2 ceramics were investigated. TEM results indicate the formation of a core-shell structure. Transmission electron microscope (TEM) reveals the formation of core-shell structure. X-ray diffraction (XRD) obtained clear tetragonal perovskite structure PLZT and SiO_2 phase. The phase transition temperature of PLZT@SiO_2 ceramics is between 222 °C and 225 °C, and its dielectric constant can be adjusted by the holding time. The PLZT with surface coated SiO_2 can increase the breakdown electric field (BDS) and thus increase the energy density. When the holding time is 9 h, the breakdown electric field is as high as 156.84 kV/cm, and the recoverable energy density (W_(re)) is 1.92 J/cm~3, which is mainly determined by its high density and breakdown electric field.
NSTL
Elsevier
