| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a carrier core material for electrophotographic developer capable of preventing the occurrence of carrier scattering causing abnormality of image and achieving high effect in preventing peeling-off of the resin coated on a coat core material and to provide a carrier using this core material and a manufacturing method for the carrier core material. Ž<P>SOLUTION: This carrier core material for electrophotographic developer contains magnetite or soft ferrite expressed in the following formula: (M<SB>x</SB>Fe<SB>3-x</SB>)O<SB>4</SB>(wherein M is divalent metal such as Fe, Mg, Mn, Ca, Ti, Cu, Zn, Sr, Ni or the like and 0≤x<1) and Al<SB>2</SB>O<SB>3</SB>having 0.1 mass% or more and 1 mass% or less by Al conversion and solid-dissolved in a ferrite phase. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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