Molybdate of cerium and of alkali metal or of alkaline-earth metal, process for its preparation and its use as a dye pigment.

摘要

The invention concerns one cerium and alkaline or alkaline earth molybdate, method of its preparation and use as colouring pigment. The molybdate is characterised in that it has an alkaline and/or alkaline earth/cerium atomic ratio less than 1. It has a deformed scheelite and monoclinic crystallographic structure. It can be prepared by a method that comprises the following steps: an alkaline and/or alkaline earth molybdate and a cerium salt are brought together; the medium thus formed is precipitated; the resulting precipitate is calcined. The molybdate can be used as pigment in plastic materials, paints, surface coating, rubber, ceramics, glazing, paper, ink, cosmetic products, dyes, leather, laminated coatings and materials based on or obtained from at least a mineral binder.