New Red-Shade Ceramic Pigments Based on Y2Sn2−xCrxO7−δ Pyrochlore Solid Solutions |
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| Authors: | Radostin Stefanov Pavlov Juan B Carda Castelló Vicente Blasco Marzá J M Hohembergerger |
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| Affiliation: | Department of Inorganic and Organic Chemistry, University of Jaume I, Castelló12080, Spain |
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| Abstract: | New high-stability red-shade ceramic pigments based on pyrochlore solid solutions Y2Sn2? x Cr x O7?δ ( x = 0–1, 0 < δ= 0–1/2 x ) were developed employing conventional solid-state reaction synthesis. The relationship between their optical properties and microstructure was analyzed by X-ray diffractometry and ultraviolet–visible-light spectroscopy. Decomposition of the structure with formation of the perovskite YCrO3 observed for chromium substitutions x ≥ 5 was attributed mainly to high concentration of defects. The structural and optical parameters of the materials were found to correlate with the concentration of a species with higher oxidation state than Cr(III), such as Cr(IV) or Cr(V). |
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| Keywords: | pigment pyrochlore optical materials/properties |
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