3 Process for Preparing BaTiO3-based Dielectric Ceramics with High Density and Ultra-Fine Grains

摘要

The present invention relates to a method for producing a high density ultrafine BaTiO ₃ based dielectric ceramic to which rare earth elements are added. BaTiO ₃ based method for producing a dielectric ceramic of the present invention, La ₂ O ₃ to BaTiO ₃ powder in a usual solid-phase reaction method, and (or) M ₂ O ₃ (M is Pr, Nd, Sm, Eu, Gd, Tb, It is a rare earth element selected from the group consisting of Dy, Ho, Er and Yb) powder is added in an amount of 5 mol% or less to prepare a mixed powder, it is characterized in that it is sintered in an oxygen atmosphere. According to the present invention, by adding a rare earth element to BaTiO ₃ and controlling the sintering process to an oxygen atmosphere, high density ultrafine BaTiO ₃ based dielectric ceramics can be obtained.