Method of preparation, by a wet route, ferrite structure magnetoplumbite, in the form of fine particles

摘要

The invention relates to a method of preparation of fine particles of ferrite having the structure magnetoplumbite. / p & & p & according to the invention, it is subjected to g - feo and at least one composed of a divalent metal chosen from the group consisting of ba, sr and pb has a hydrothermal treatment in an aqueous alkaline solution; the attached drawing shows a micrograph electronique of particles in the form of plates of a hexagonal ba - ferrite obtained. / p & & p & the invention applies in particular to the materials magnetic compounds and to the supports magnetic.