研究目的
Designing high power and energy-storage density dielectric materials for miniature and compact electronic and electrical devices, focusing on antiferroelectric analogous ceramics with improved energy-storage performance.
研究成果
The Y2O3-doped PSLZSnT ceramics exhibit excellent energy-storage performance with a density of 176.6 mJ/cm3 and efficiency of 66.09% at 20 kV/cm, attributed to their pure perovskite structure, high density, small grain size, and antiferroelectric-like behavior. Future work should focus on increasing the dielectric breakdown strength through composite formation, sintering aids, and defect reduction.
研究不足
The electric field measurement was limited to 20 kV/cm due to equipment constraints and dielectric breakdown concerns. The ceramics require a higher dielectric breakdown strength for practical applications, and further improvements in density, grain size reduction, and defect chemistry are needed.
1：Experimental Design and Method Selection:
The Y2O3-doped PSLZSnT ceramics were prepared using the solid-state sintering method with Y2O3-coating introduced via the self-combustion method to inhibit grain growth and stabilize the perovskite structure.
2：Sample Selection and Data Sources:
Stoichiometric oxides and carbonates (PbO, SrCO3, La2O3, ZrO2, SnO2, TiO2) were used as raw materials, with an additional 5 mol% PbO added. Y2O3-coated powder was synthesized using Y(NO3)3·6H2O, citric acid, CTAB, and calcined PSLZSnT precursor powder.
3：List of Experimental Equipment and Materials:
XRD equipment (Rigaku D/max-2500/PC), SEM equipment (Hitachi S-4800), P-E hysteresis loop measurement equipment (Radiant Precision Premier LC), and materials for sintering and coating.
4：Experimental Procedures and Operational Workflow:
The mixture was calcined at 900°C for 3 hours, self-combusted at 300°C for 2 hours, cold-pressed into pellets, and sintered at 1275°C for 2 hours. Crystal structure and morphology were characterized by XRD and SEM, and energy-storage properties were measured using P-E loops.
5：Data Analysis Methods:
Energy-storage density and efficiency were calculated from P-E hysteresis loops using integration and ratio formulas; statistical analysis of grain size was done with SmileView software.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
