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Y‐Doped Bi 2 MoO 6 Yellow Pigments for the Coloration of Plastics
Author(s) -
Kumari Leela Sandhya,
Gayathri Thozhuthungal Haridasan,
Sameera Saithathul Fathimah,
Rao Padala Prabhakar
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.04268.x
Subject(s) - pigment , doping , materials science , ceramic , yttrium , chromaticity , absorption edge , valence (chemistry) , hue , octahedron , visible spectrum , mineralogy , crystallography , chemistry , band gap , optics , optoelectronics , crystal structure , metallurgy , organic chemistry , physics , oxide
Y‐doped Bi 2 MoO 6 was synthesized by the conventional ceramic method in order to assess its potential as ceramic pigment. The optimized colorants were characterized for their structural as well as optical properties. The Bi (2− x ) Y x MoO 6 materials absorb the visible and the ultraviolet light under 500 nm efficiently, which is originated in the transition from the valence band consisting of the O 2 p orbitals to the conduction band derived from the primary Mo 4 d orbitals in MoO 6 octahedra and the secondary Bi 6 p orbitals. The absorption edge of the pigments is red shifted by yttrium doping, and as a result, the pigments display colors from pale yellow to yellow. The effective yellow hue was observed for BiYMoO 6 , which imparted good coloration to plastics. The synthesized pigments were found to be interesting alternatives to existing toxic yellow pigments.