| 摘要 |
PROBLEM TO BE SOLVED: To provide a carrier of a developing agent for electronic photograph, with which a photograph having a excellent image quality and durability can be obtained, specifically which is free from leakage in developing the photograph, which has an excellent environmental stability in a static charge with toner, which is reduced in the variance in magnetization among particles, and to provide a method for producing the same, a developing agent for electronic photograph using the carrier, and a ferromagnetic material powder used as the core material of the carrier. SOLUTION: A magnetite phase and ferrite phase are present in a mixed manner in the magnetic metallic oxide powder. The ratio of divalent irons to the whole irons is 1.0-32.0 and a magnetoplumbite type ferrite phase is contained in the ferrite phase. |
