Preparation And Properties Of Barium Titanate Energy Storage Materials

Today,with the rapid development of the electronics industry,the construction of power grid systems,hybrid vehicle development,pulse power boost technology and other aspects are needed a material high energy storage density.In this paper,barium strontium titanate(Ba_0.8Sr_0.2)TiO₃?BST?is chosen as the research object to explore the relationship between its structure and properties.The effects of Bi(Zn_2/3Nb_1/3)O₃?BZN?Bi(Mg_2/3Nb_1/3)O₃?BMN?doping on the composition,dielectric temperature characteristics and energy storage of the BST were investigated.(Ba_0.8Sr_0.2)TiO₃-xBi(Zn_2/3Nb_1/3)O₃?x=0.02-0.18?ceramics were prepared by solid-state sintering method.The effects of structure,dielectric properties and energy storage properties on the ceramics were studied.The results showed that with the increasing of the content of BZN,the XRD detection showed the BZN could dissolve with the main phase ceramics in perovskite structure.The sintering temperature of the BST is improved as the content of BZN increases,which is beneficial to the sintering process.And as the value of x increases,the peak of the Curie peak is compressed to be wide and moved to a low temperature,The relaxation characteristics of the sample material are obvious.The optimum formula and energy storage performance are:0.88BST-0.12BZN,the breakdown field strength²25kV/cm,the energy storage density¹.62J/cm³,the energy storage efficiency⁹9.8%.(Ba_0.8Sr_0.2)TiO₃-xBi(Mg_2/3Nb_1/3)O₃?x=0.08-0.16?ceramics were investigated in order to synthesize new ceramics with high energy density,low loss and high temperature stability.The results show that the breakdown electric field?E_b?intensity of the main phase can be effectively changed by doping Bi(Mg_2/3Nb_1/3)O₃,which affects the energy storage density(W_rec)and efficiency???of the main phase.The 0.90BST-0.10BMN ceramic exhibited excellent energy storage properties with a W_rec².02J/cm³ and a?⁹6.8% at a high E_b²50kV/cm.Under the research,we have understood the constraints and improvement methods,and provided new ideas for the future study of BST energy storage.Through innovation,new and efficient energy storage materials will be more used in our lives.