Low‐Temperature Sintering Barium Titanate‐Based X8R Ceramics with Nd ₂ O ₃ Dopant and ZnO–B ₂ O ₃ Flux Agent

Abstract

To demonstrate that barium titanate‐based ceramics could be sintered at a low temperature thus reducing the cost of capacitor production, systematic investigation has been made on the structure and dielectric properties of barium titanate‐based X8R ceramics, doped with various Nd 2 O 3 content and different ZnO–B 2 O 3 solution as the sintering aids. The dielectric ceramic powder with good permittivity and low dielectric loss were obtained at a sintering temperature of 900°C, meeting X8R specifications. Transmission electron microscopy and EDS analysis shows a high concentration of Nd element in the boundary regions, which verifies the beneficial role of Nd in facilitating the formation of core‐shell structure. The results also suggest that the developed BaTiO 3 ‐based ceramics may serve as a promising candidate for fabricating cheap multilayer capacitors with pure Ag as inner electrode.