Tdk Corporation

Takeshi Shouji

Toshihiro Iguchi

Satoshi Sugawara

Yuichiro Sueda

Tomoaki Nonaka

Shota Kumagai

Atsushi Yamada

Manabu Kumagai

Kengo Aizawa

Masatoshi Tarutani

A dielectric composition, including: dielectric grains containing a main component represented by a composition formula [(CaSr)O][(TiHfZr)O] (m is more than 1.020); a grain boundary phase located between the dielectric grains; and segregation grains each containing at least Ca, Si, and O. A first segregation grain is defined as a segregation further containing Mn among the segregation grains each containing at least Ca, Si, and O, and a second segregation grain is defined as a segregation containing substantially no Mn among the segregation grains each containing at least Ca, Si, and O. N1/(N1+N2) is more than 0.23 and 1.00 or less, in which N1 is a number density of first segregation grains in a cross-section of the dielectric composition, and N2 is a number density of second segregation grains in the cross-section of the dielectric composition.

Dielectric composition and multilayer ceramic electronic component

A dielectric composition includes a dielectric grain including a perovskite compound and a first segregation phase including at least Ca, Al, Si, and O.

Dielectric composition and multilayer ceramic electronic device

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Tokyo, Japan

Takeshi Shouji