2results about How to "Good image quality" patented technology

Provided are a ferrite particle, a carrier for electrophotographic developers, and the like, which have: a ferrite particle main body having a spinel crystal structure belonging to space group Fd-3m, the spinel component being represented by a specific formula (1); and a coating layer having a spinel crystal structure belonging to space group Fd-3m, covering the surface of the ferrite particle main body; the coating layer being a layer obtained by heat treating a ferrite represented by the specific formula (1), the content ratio of the coating layer in the ferrite particle being 5 mass% or more and 35 mass% or less, as determined by Rietveld analysis of a powder X-ray diffraction pattern, and satisfying a specific formula (2).

Provided are a ferrite particle represented by a specific formula, an electrophotographic developer carrier for an electrophotographic developer including the ferrite particle and a resin coating layer covering the surface of the ferrite particle, an electrophotographic developer including the electrophotographic developer carrier for an electrophotographic developer and toner, and a method for manufacturing the ferrite particle, which have a spinel crystal structure belonging to space group Fd-3m.