The development of X8R BaTiO_(3)-based dielectric materials is of great significance for the hightemperature application of MLCCs.Herein,a series of BaTiO3-based dielectric ceramics were prepared by the conventional s...The development of X8R BaTiO_(3)-based dielectric materials is of great significance for the hightemperature application of MLCCs.Herein,a series of BaTiO3-based dielectric ceramics were prepared by the conventional solid-state method,and the effects of Bi_(4)Ti_(3)O_(12)and Mn_(3)O_(4)on the properties of BaTiO_(3)-based dielectric ceramics were studied.The SEM images show that the addition of Bi_(4)Ti_(3)O_(12)with a low melting point can densify the ceramics at a lower sintering temperature(1,150℃).TEM images and EDS results indicate that the samples have a“core-shell”structure,which can be optimized by Bi_(4)Ti_(3)O_(12),resulting in phase transition dispersion and thus improving the temperature stability of the material.The addition of Mn can reduce the dielectric loss of ceramics at high temperatures.As a result,the optimal composition exhibits a high permittivity of 2,090,a low dielectric loss of 1.1%,and high temperature stability satisfying the X8R specification.展开更多
基金supported by the National Key R&D Program of China(grant number 2021YFB3800601)the Basic Science Center Project of the National Natural Science Foundation of China(NSFC)(grant number 51788104)the Fellowship of China Postdoctoral Science Foundation(grant number 2022M710073).
文摘The development of X8R BaTiO_(3)-based dielectric materials is of great significance for the hightemperature application of MLCCs.Herein,a series of BaTiO3-based dielectric ceramics were prepared by the conventional solid-state method,and the effects of Bi_(4)Ti_(3)O_(12)and Mn_(3)O_(4)on the properties of BaTiO_(3)-based dielectric ceramics were studied.The SEM images show that the addition of Bi_(4)Ti_(3)O_(12)with a low melting point can densify the ceramics at a lower sintering temperature(1,150℃).TEM images and EDS results indicate that the samples have a“core-shell”structure,which can be optimized by Bi_(4)Ti_(3)O_(12),resulting in phase transition dispersion and thus improving the temperature stability of the material.The addition of Mn can reduce the dielectric loss of ceramics at high temperatures.As a result,the optimal composition exhibits a high permittivity of 2,090,a low dielectric loss of 1.1%,and high temperature stability satisfying the X8R specification.
