| 摘要 |
A resin-filled ferrite carrier for an electrophotographic developer filled with a silicone resin in voids of a porous ferrite core material which continuously extend from a surface to a core interior, wherein the resin-filled ferrite carrier has an average particle size of 20 to 50 mum, and (Si/Fe)x100 as determined from X-ray fluorescence elemental analysis is 2.0 to 7.0, and the particle size and (Si/Fe)x100 are correlated, and wherein in the correlation relationship between [(Si/Fe)x100] and the particle size, a gradient (a) in a correlation equation thereof is -0.50<=a<=0.15.
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