USE OF SAMARIUMMOLYBDATE AS YELLOW INORGANIC PIGMENT

摘要

The present invention provides a non-toxic yellow inorganic pigment consist of samarium and molybdenum oxides which may be used as additives to plastics, glasses, ceramics and paints. The samarium molybdenum yellow pigment preferably comprise Sm6MoO12 having a cubic crystal structure. Inorganic pigments according to the invention are formed by mixing stoichiometric amounts of (NH4)6Mo7O24.4H2O and Sm2O3; ball milled and calcined 1500-1650 C for 10-12 h in air atmosphere. The well ground calcined powders were used for characterization of the pigments. The phase purity and optical properties of the prepared pigments were investigated. A further aspect of the present invention is to provide of colouring a substrate. The method includes the steps of providing a substrate, and adding a samarium molybdate yellow pigment to the substrate. The samarium molybdate yellow pigment may be dispersed in the substrate or coated on the substrate.