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US 12,386,281 B2Granted
Ferrite particles, electrophotographic developer carrier core material, electrophotographic developer carrier, and electrophotographic developer
AssigneePowdertech Co., Ltd.
InventorsMakoto Ishikawa, Tetsuya Uemura
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Abstract
The present invention provides: a ferrite particle containing a crystal phase component containing a perovskite crystal represented by the compositional formula RZrO3 (where R is an alkaline earth metal element); and an electrophotographic developer carrier core material, an electrophotographic developer carrier, and an electrophotographic developer containing the ferrite particles.
Claims15
A ferrite particle having a unified polycrystalline body comprising a ferrite component and a perovskite crystal represented by the compositional formula:
- RZrO3, wherein R represents an alkaline earth metal element, wherein the ferrite particle comprises 0.05% by mass or more and 2.50% by mass or less of the perovskite crystal when a phase composition analysis of a crystal phase constituting the ferrite particle is performed by a Rietveld analysis of an X-ray diffraction pattern.
Dependencies are inferred from the claim text.