XIN Feng, ZHANG Xiaohua, CHEN Yichuan, ZENG Renfen, SHUAI Weiqiang, HU Yuehui
(School of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)

Abstract: Multilayer ceramic capacitors (MLCCs) as basic components of electronic information systems have been widely used in the electronic industry. Among them, BaTiO₃-based MLCC with Y5V specification has attracted much attention for its good dielectric properties and temperature stability. In this paper, dielectric properties and electrostatic storage characteristics of the BaTiO₃-based Y5V MLCC with ultra-thin dielectric layers were studied. Its polarization response to the external electric field was analyzed, based on the frequency spectrum and temperature dependence of the dielectric properties. It is shown that the dielectric permittivity is suppressed by the applied dc bias and the resonant frequency shifts to the high frequency direction with the increase of the bias. Its electrostatic energy density reaches 1.76 J/cm³and the storage efficiency decreases with the increase of the electric field.

Key words: MLCC; Y5V; dielectric property; energy storage