Electrophotographic photoconductor, method of manufacturing same and image forming method, image forming apparatus and process cartridge using same
AssigneeRicoh Company, Ltd.
InventorsHidetoshi Kami, Tatsuya Niimi, Akihiko Matuyama, Nozomu Tamoto, Eiji Kurimoto
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Abstract
An electrophotographic photoconductor having an electroconductive support, and a photoconductive layer formed on the support and having an outwardly facing surface. The photoconductive layer includes a charge transporting material, a charge generating material and an inorganic filler including α-alumina, wherein the concentration of the inorganic filler in the photoconductive layer decreases stepwise or continuously in the direction from the outwardly facing surface thereof to the opposite surface thereof.
Claims12
An electrophotographic photoconductor comprising an electroconductive support, and a photoconductive layer formed on said support, said photoconductive layer including a charge transporting material, a charge generating material and an inorganic filler comprising α-alumina, wherein the α-alumina is in the form of particles having (a) a polyhedral shape, (b) a hexagonal close-packed lattice crystal structure and (c) a DIH ratio of from 0.5-5.0 wherein D represents a maximum particle diameter parallel to a hexagonal lattice plane of said hexagonal close-packed lattice and H represents a diameter perpendicular to said hexagonal lattice plane.
Dependencies are inferred from the claim text.