Orange cerium pigment

Used as cerium yellow, an orange-yellow pigment Colour Index, 1971, Cl 77280). 

In solid solutions, rare earths impart colour to the solutions due to their electronic configurations. This property has been profitably used in the manufacture of ceramic pigments which are extensively used in colouring of wall and floor tiles, table-ware and sanitary-ware. Cerium and praseodymium are extensively used in ceramics pigments. The shades that result due to the use of cerium and praseodymium are yellow, orange and green. 

In traditional areas such as ceramic tiles, praseodymium oxide in a zirconium silicate matrix is used as a yellow stain. Cerium oxide is used as an opacifier or to give esthetic effects in the glaze. Other pigment colours, such as orange with yttrium oxide and light purple with neodymium oxide can be prepared. The compositions of these pigments are given in Table 12.19. 

Uses High-temp, thermoelectric material pigment for plastics, food-contact materials Trade Name Synonyms Cerium Orange PO 75 [Rhodia HPCII France... 

Figure 4-6 Reflectance curves of orange, red and burgundy cerium suifide pigments.

Cerium sulfide pigment Light orange Orange Red Burgundy... 

Cerium sulfide pigments can be used either alone or in combination with other pigments and colorants to obtain orange and red shades. They are also successfully employed as shading pigments in pastels and beige tints. 

Cerium sulfide light orange Pigment Orange 78 formula Ce Sj LaSj... 

Cerium sulfide orange Pigment Orange 75 formula Ce Sg... 

A range of coloured pigments based on the sulfide of the rare earth element cerium have been recently introduced (industrial production since 1997), with colours ranging fi om yellow to red. Ceriinn sulfide itself has an intense red colour however, by the introduction of an alkaline element (lithium, sodium) in small proportions, the dark red colour is transformed into a light red to orange. 

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