Dielectric ceramic composition, multilayer ceramic capacitor, and method for manufacturing the same

Abstract

Provided are a dielectric porcelain composition, a laminated ceramic capacitor and the manafacturing method thereof. The dielectric porcelain composition comprises barium titanate as the principal component, a first subcomponent (at least one member of the oxides of Mg, Ca, Ba, and Sr), a second subcomponent (an oxide containing 1 mol of Si atoms in 1 mol), a third subcomponent (at least one member of the oxides of V, Mo, and W), a fourth subcomponent containing at least one kind of R1oxide (wherein R1is at least one member selected from among Sc, Er, Tm, Yb, and Lu), a fifth subcomponent containing at least one kind of R2oxide (wherein R2is at least one member selected from among Y, Dy, Ho, Tb, Gd, and Eu), a sixth subcomponent (at least one member selected from the oxides of Mn and Cr), and a seventh subcomponent (at least one member selected from calcium zirconate and a mixture of a Ca oxide and a Zr oxide). The ratio of the number of moles A of the second subcomponent of the composition 1, and the total number of moles B of the fourth subcomponent and the fifth subcomponent is no less than 0.7; the ratio of the number of moles C of the Si atoms in the second subcomponent of the composition 2, and the total number of moles D of the atoms except Si and oxygen in all the subcomponents.

Description

technical field [0001] The present invention relates to a dielectric ceramic composition, a multilayer ceramic capacitor and a manufacturing method thereof, and more specifically, to a dielectric ceramic composition and a multilayer ceramic having a long mean time to failure (MTTF: Mean Time To Failure) and satisfying X8R characteristics capacitors etc. technical background [0002] Electronic Components Multilayer ceramic capacitors are widely used as small, large-capacity, and highly reliable electronic components. In recent years, along with the miniaturization and high performance of equipment, the situation that multilayer ceramic capacitors are required to be further miniaturized, larger in capacity, lower in price, and higher in reliability has become increasingly severe. [0003] In multilayer ceramic capacitors, the paste for the internal electrode layer and the paste for the dielectric layer are usually laminated by the sheet method (シャト method) or the printing me...

AI Technical Summary

Problems solved by technology

However, BaTiO 3 The high dielectric constant material of the series cannot meet the X7R characteristics of the EIA specification (-55~125°C, ΔC / C=±15% or within ±15%), and cannot be adapted to the automotive electronic devices used in the above harsh environments

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