Ceramic powder, dielectric paste, 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 for forming a dielectric ceramic layer in a laminated ceramic electronic component in which a dielectric ceramic layer and an internal electrode layer are alternately laminated, and in particular to a ceramic powder effective for improving the dielectric properties 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, laminated ceramic capacitors, a typical example of laminated ceramic electronic components, have a structure in which multiple dielectric ceramic layers and internal electrode layers are alternately laminated, and are widely used as small, large-capacity, and high-reliability electronic components. For example, it is not uncommon to use many MLCCs in one electronic machine. [0003] In recent year...

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Problems solved by technology

[0004] In this situation, the thinning of each layer has progressed to about 2 μm between layers (the thickness of each dielectric ceramic layer is about 2 μm), but if the dielectric ceramic layer is thinned, when a voltage is applied, the The electric field of the layer becomes stronger, the dielectric loss significantly deteriorates, and the capacity temperature characteristics also deteriorate, causing many problems.

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