Oxide powder for dielectrics, method of manufacturing oxide powder for dielectrics, and multi-layer ceramic capacitor using the same

摘要

Disclosed herein is a small particle oxide powder for dielectrics. The oxide powder has a perovskite structure, an average particle diameter [D50(mum)] of 0.3 mum or less, a particle size distribution of the average particle diameter within 3%, a particle size distribution satisfying a condition D99/D50<2.5, a content of OH^- groups of 0.2 wt % and a C/A axial ratio of 1.006 or more. A method of manufacturing the oxide powder comprises the steps of mixing TiO₂ particles and a compound solved with at least one element represented by A of the perovskite structure of ABO₃; drying and pulverizing the mixture of TiO₂ and the compound; calcining the pulverized mixture; adding the oxide containing the elements of the site A to the coated TiO₂ particles and wet-mixing, drying and pulverizing; primarily calcining and pulverizing the pulverized powder under vacuum; and secondarily calcining and pulverizing the powder.