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New Red‐Shade Ceramic Pigments Based on Y 2 Sn 2− x Cr x O 7−δ Pyrochlore Solid Solutions
Author(s) -
Pavlov Radostin Stefanov,
Castelló Juan B. Carda,
Marzá Vicente Blasco,
Hohembergerger J. M.
Publication year - 2002
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.1151-2916.2002.tb00245.x
Subject(s) - pyrochlore , ceramic , solid solution , microstructure , materials science , chromium , perovskite (structure) , decomposition , pigment , solid state , mineralogy , spectroscopy , analytical chemistry (journal) , crystallography , chemistry , metallurgy , phase (matter) , physics , organic chemistry , chromatography , quantum mechanics
New high‐stability red‐shade ceramic pigments based on pyrochlore solid solutions Y 2 Sn 2− x Cr x O 7−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 YCrO 3 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).