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公开(公告)号：DD292469A5
公开(公告)日：1991-08-01
申请号：DD33835490
申请日：1990-03-02
Applicant: DEGUSSA
Inventor： SPEER DIETRICH , KISS AKOS , KLEINSCHMIDT PETER
Abstract: Beige-brown encapsulated pigments are obtained by means of the encapsulation of iron titanates of the formula Fe2TiO5 in zirconium silicate crystals. The production takes place by calcining a mixture of zirconium oxide with a particle size distribution of /=4 m2/g, silicon dioxide and iron oxides and titanium oxides or oxide-forming Fe compounds and Ti compounds in the presence of mineralizers under oxidizing conditions at 800 DEG to 1300 DEG C.
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