Preparation And Energy Storage Properties Of Three-phase Point Barium Titanate-based Lead-free Ceramics

In recent years,dielectric capacitors have been widely used in the power electronics industry due to their short charge and discharge times and low cost.Dielectric ceramic materials have a higher temperature and a wider range of applications than polymer dielectric capacitor materials,and have attracted the attention of a large number of researchers.However,each material has its shortcomings,and the dielectric ceramic material has a relatively low breakdown strength,which also limits its energy storage characteristics to meet current requirements.In order to improve this shortcoming,the application of three-phase point dielectric ceramic material in the neighborhood of energy storage has been reported.It has high polarization strength under low electric field conditions,and the energy storage efficiency can reach more than 90%.As the electric field strength increases,the three-phase point dielectric ceramic samples were quickly broken down.At the same time,this subject improves its breakdown strength by adding low relative dielectric constant BZN and BMZ materials,thereby improving the energy storage performance of the three-phase point dielectric ceramic material,and testing and characterizing the three-phase point ceramic material.The main research contents and results of this paper are as follows:1.A(1-x)BTS-xBZN two-phase composite energy storage ceramic sample was prepared by the traditional solid-phase method.After ferroelectric testing at a frequency of 10 Hz,the effective energy storage density of BTS-10wt%BZN was 1.15 J/cm3,the energy storage efficiency reaches more than 99%.2.(1-x)BTS-xBMZ solid solution energy storage ceramic materials were prepared.The BMZ material is used to increase the energy storage density of the three-point BTS ceramic material,and the effective energy storage density can reach 1.52J/cm3 on the basis of sacrificing energy storage efficiency.3.Ba0.9Sr0.1Ti0.895Sn0.105O3-11wt%BZN solid solution ceramic material with high energy storage performance was prepared.Adding SrTiO3 linear dielectric and low relative dielectric constant BZN material to the three-phase BTS ceramic material makes the effective energy storage density of Ba0.9Sr0.1Ti0.895Sn0.105O3-11wt%BZN solid solution ceramic material up to 2.18 J/cm3,The energy storage efficiency reaches 95.6%.