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Title: Synthesis and characterization of environmentally benign calcium-doped Pr2MO2O9 pigments: Applications in coloring of plastics
Authors: Giable George
Sandhya Kumari, L
Vishnu, V S
Ananthakumar, S
Reddy, M L P
Keywords: Novel rare earth yellow pigments
Environmentally benign
Band gap engineering
Coloring of plastics
Friendly yellow pigments
Zircon pigments
Praseodymium
Solid-solutions
Issue Date: 2008
Publisher: Elsevier
Citation: Journal of Solid State Chemistry 181(3):487-492;Mar 2008
Abstract: A new class of environmentally benign rare earth pigments of general formula Pr2-xCaxMo2O9-delta(xrangesfrom 0 to 1.0) displaying colors ranging from green to yellow were synthesized by traditional solid-state route, as alternatives to lead, cadmium and chromium colorants. The products were characterized by X-ray powder diffraction, UV-vis spectroscopy and CIE-L*a*b* 1976 color scales. The coloring mechanism is based on the strong absorptions of the pigments in the blue and red regions due to electronic transitions between 4f(2) -> 4f(1) 5d(1) states of Pr3+. The designed pigments consist of non-toxic elements and further found to be thermally and chemically stable. The yellow-green pigments were found to be interesting alternatives to existing toxic pigments for coloration of plastics.
URI: http://ir.niist.res.in:8080/jspui/handle/123456789/2100
ISSN: 0022-4596
Appears in Collections:2008

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