Ceramic powder, dielectric paste using same, multilayer ceramic electronic component, and method for production thereof

Abstract

As the ceramic powder fated to form dielectric ceramic layers in a multilayer ceramic electronic component resulting from alternately stacking the dielectric ceramic layers and internal electrode layers, a ceramic powder that possesses a perovskite-type crystal structure and satisfies an expression X < 3, wherein X denotes the weight ratio Wt / Wc of the tetragonal phase content Wt and the cubic phase content Wc, is used. The weight ratio Wt / Wc of the tetragonal phase and the cubic phase is determined by the polyphasic analysis in accordance with the Rietveld method. The ceramic powder is a barium titanate powder, for example. The specific surface area of the ceramic powder is in the range of 4 to 10 m 2 / g.

Description

technical field [0001] The present invention relates to a ceramic powder used for forming a dielectric ceramic layer in a laminated ceramic electronic component in which dielectric ceramic layers and internal electrode layers are alternately laminated, and particularly to a ceramic powder useful for improving the withstand voltage characteristics of a laminated ceramic electronic component. Furthermore, it is related with the dielectric paste which used the said ceramic powder, a laminated ceramic electronic component, and its manufacturing method. Background technique [0002] For example, multilayer ceramic capacitors, one of the multilayer ceramic electronic components, have a structure in which a plurality of dielectric ceramic layers and internal electrode layers are alternately stacked, and are widely used as small, large-capacity, and high-reliability electronic components. There are also many cases where multiple multilayer ceramic capacitors are used in one electron...

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Problems solved by technology

[0005] However, when the internal electrode layer is formed using the conductive paste for internal electrodes mainly composed of base metals such as Ni, for example, the thickness of the dielectric ceramic layer is set to be 10 μm or less, or the number of stacked layers is 100 or more, the internal electrode layer may The shrinkage and expansion of the dielectric ceramic layer are different from the shrinkage behavior of the dielectric ceramic layer, resulting in possible peeling (delamination) or cracks, resulting in a problem of poor manufacturing yield

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