公开(公告)号：JPS62229160A

公开(公告)日：1987-10-07

申请号：JP28221586

申请日：1986-11-28

Applicant: BASF AG

Inventor： BUERUNAA OSUTERUTAAKU ,  ERUBUIN KUTSUEHI ,  FURANTSU URURIHI SHIYUMITSUTO ,  DETOREFU SHIYURUTSUEEHAAGENESU

IPC: B22F9/28 ,  C09D5/23 ,  G03G9/08 ,  G03G9/083 ,  G03G9/09

公开(公告)号：JPH02114270A

公开(公告)日：1990-04-26

申请号：JP23307789

申请日：1989-09-11

Applicant: BASF AG

Inventor： ERUBUIN KUTSUEHI ,  BUERUNAA OSUTERUTAAKU ,  DETOREFU SHIYURUTSUEEHAAGENESU ,  FURANTSUUURURITSUHI SHIYUMITSU

IPC: C23C8/18 ,  G03G9/097 ,  G03G9/107 ,  G03G9/113

Abstract: PURPOSE: To continuously regenerate even in use and to guarantee high copying image quality over a long period by providing a specific iron oxide-containing surface coating on a steel spherical nucleus sulfuric acid-treated with a specific sulfuric acid aq. solution. CONSTITUTION: The sulfuric acid heated steel spherical nucleus obtained by heating the steel spherical nucleus with the sulfuric acid aq. solution having 10 to 10 mol/l acid concentration at the time of starting the treatment by using 5×10 to 25×10 mol sulfuric acid per 1m surface area of the steel spherical nucleus is used. The iron oxide-containing surface coating film expressed by formula I, which is obtained by oxidizing with the acid or oxidizing agent having the oxidation equivalent of 5×10 to 25×10 per 1m surface area and drying at 60-150 deg.C under

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.