Ferrite composition and multilayer electronic component
AssigneeTDK Corporation
InventorsTakeshi Shibayama, Takashi Suzuki, Yukio Takahashi
Life of this patent
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Abstract
A ferrite composition includes main-phase particles, first sub-phase particles, second sub-phase particles, and a grain boundary. At least 10% or more of the main-phase particles contain a portion whose Zn concentrations monotonously decrease from a particle surface toward a particle central part along a length of 50 nm or more. The first sub-phase particles contain Zn2SiO4. The second sub-phase particles contain SiO2. A total area ratio of the first sub-phase particles and the second sub-phase particles is 30.5% or more.
Claims9
A ferrite composition comprising main-phase particles composed of spinel ferrite, first sub-phase particles, second sub-phase particles, and a grain boundary, wherein
- at least 10% or more of the main-phase particles contain a portion whose Zn concentrations monotonously decrease from a particle surface toward a particle central part along a length of 50 nm or more,
- the first sub-phase particles contain Zn2SiO4,
- the second sub-phase particles contain SiO2, and
- a total area ratio of the first sub-phase particles and the second sub-phase particles is 30.5% or more.
A ferrite composition comprising main-phase particles composed of spinel ferrite, first sub-phase particles, second sub-phase particles, and a grain boundary, wherein
- at least 10% or more of the main-phase particles are composed of a core part and a shell part whose Zn concentration is higher than that of the core part,
- the first sub-phase particles contain Zn2SiO4,
- the second sub-phase particles contain SiO2, and
- a total area ratio of the first sub-phase particles and the second sub-phase particles is 30.5% or more.
Dependencies are inferred from the claim text.