Novel and environmentally friendly (Bi,Ca,Zn)VO4 yellow pigments

• Novel Bi1−x−yCaxZnyVO4−(x+y)/2 (0 ≤ x ≤ 0.10, 0 ≤ y ≤ 0.10) pigments were synthesized.
• The color properties of the samples were characterized using the CIE L*a*b* system.
• The most vivid yellow hue was obtained for Bi0.90Ca0.08Zn0.02VO3.95.
• The yellowness value (b*) of Bi0.90Ca0.08Zn0.02VO3.95 was +91.6.
• Bi0.90Ca0.08Zn0.02VO3.95 is an environmentally friendly pigment.

Bi1−x−yCaxZnyVO4−(x+y)/2 (0 ≤ x ≤ 0.10, 0 ≤ y ≤ 0.10) pigments were synthesized as novel inorganic yellow pigments that are environmentally friendly, and their color properties were characterized. The Bi1−x−yCax–ZnyVO4−(x+y)/2 pigments exhibited brilliant yellow colors, and using the CIE L*a*b* system, the most vivid yellow hue was obtained for Bi0.90Ca0.08Zn0.02VO3.95 with a yellowness value (b*) that is larger than that of a commercially available bismuth vanadate yellow pigment. BiVO4 is an environmentally friendly inorganic yellow pigment, and Ca and Zn are also nontoxic elements; therefore, the Bi0.90Ca0.08Zn0.02VO3.95 pigment should be an effective alternative to conventional toxic yellow pigments.

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