OXIDE POWDER FOR DIELECTRICS, METHOD OF MANUFACTURING OXIDE POWDER FOR DIELECTRICS, AND MULTI-LAYER CERAMIC CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide a small particle oxide powder for dielectrics having a narrow particle size distribution, a low content of an OH-group, a high C/A axial ratio and a perovskite structure and a multi-layer ceramic capacitor including dielectrics manufacturing by using the oxide powder.

SOLUTION: The method of manufacturing the oxide powder for dielectrics having the ABO3(A is one or two or more kinds selected from atoms of 2 in valence and rare earth elements and B is Ti) perovskite structure comprises steps of mixing a compound dissolved with one or two or more kinds of the elements entering the site A and a TiO2raw material; calcining the mixture under a vacuum such that the site A element-containing oxide is coated on the surface of the TiO2particle, then adding the site A element-containing oxide to the coated TiO2in such a manner the site A element/Ti ratio reaches 0.995 to 1.025; and subjecting the mixture to wet mixing, drying, pulverizing and calcining. The multi-layer ceramic capacitor includes the dielectrics manufactured by using the oxide powder.

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