公开(公告)号：DE3132677A1

公开(公告)日：1983-03-17

申请号：DE3132677

申请日：1981-08-19

Applicant: BASF AG

Inventor： HIBST HARTMUT ,  KULLMANN UDO DIPL PHYS DR

IPC: C01G49/00 ,  C01G51/00 ,  C01G53/00 ,  H01F1/11 ,  H01F1/36 ,  G11B5/64

Abstract: The invention relates to a process for preparing finely particulate hexagonal ferrites of the general formula M(MeTi)xFe12-2xO19, in which M is barium or strontium, Me is zinc, nickel and/or cobalt, and x has values from 0 to 1.5, by coprecipitation of the corresponding metal ions by means of sodium carbonate solution, drying the resulting mixed precipitate, tempering the salt mixture at a temperature above the melting point of sodium chloride, but not above 950 DEG C, and then isolating the hexagonal ferrite formed in the process by leaching with water, and to the use of said ferrites for the manufacture of magnetic recording media.