Tdk Corporation

Takahiro Harada

Tomoaki Nonaka

Tsutomu Odashima

Tetsuo Takaishi

Hiroshi Sasaki

Shinsuke Hashimoto

Matsumi Watanabe

A production method of a dielectric ceramic composition at least including a main component including a dielectric oxide having perovskite-type crystal structure expressed by a formula ABO(note that in the formula, 'A' indicates one or more elements selected from Ba, Ca, Sr and Mg, and that 'B' indicates one or more elements selected from Ti, Zr and Hf) comprises steps of preparing a main component material including said dielectric oxide expressed by ABO; preparing a subcomponent material including a composite oxide expressed by MRO(SiO)(note that &#x201c;M&#x201d; indicates at least one selected from Ca and Sr, and that &#x201c;R&#x201d; indicates at least one selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu); mixing said main component material and subcomponent material to obtain a dielectric ceramic composition material; and firing said dielectric ceramic composition material.

Production method of dielectric ceramic composition and production method of electronic device

A dielectric ceramic composition comprising 100 moles of barium titanate as the main component, and furthermore comprising with respect to 100 moles of the main component 0.1 to 3 moles of a first subcomponent including a magnesium oxide, 0.01 to 0.5 mole (note that 0.5 is not included) of a second subcomponent including a yttrium oxide, 0.01 to 0.2 mole of a third subcomponent including a vanadium oxide, and 0.5 to 10 moles of a glass component including a silicon oxide as the main component; wherein a manganese oxide and a chrome oxide are substantially not included, and an average particle diameter of dielectric particles is 0.35 &#x3bc;m or smaller.

Dielectric ceramic composition and electronic device

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Nikaho, Japan

Takahiro Harada