公开(公告)号：JPS6468766A

公开(公告)日：1989-03-14

申请号：JP20331088

申请日：1988-08-17

Applicant: BASF AG

Inventor： UERUNAA OSUTERUTAAKU ,  ERUUIN TSUETSUKU ,  FURANTSUUURURITSUHI SHIYUMITSU ,  DETOREFU SHIYURUTSUEEHAAGENESU

IPC: G03G9/097 ,  G03G9/10 ,  G03G9/107 ,  G03G9/113

Abstract: PURPOSE: To obtain a wear resistant carrier causing no trouble as a photoconductor by forming metal oxide layers made of reactional product deposited form a vapor phase on core particles made of ferrite or contg. metal iron. CONSTITUTION: A volatile metallic compd. is allowed to react with oxygen and/or water at an elevated temp. in the presence of moving core particles to obtain the objective carrier for a two-component dry developer with metal oxide layers on the core particles made of ferrite or contg. metal iron. For example, iron oxide or titanium dioxide layers are uniformly formed on the core particles. The carrier has the wear resistant metal oxide layers and enables positive and negative charging. Since the thickness of the metal oxide layers can be regulated in accordance with the purpose, electric conductivity can be determined in a specified range independently of the compsn. of the core particles.