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X‐ray absorption spectroscopy study of synthetic cobalt blue pigments similar to Kangxi blue and white porcelain
Author(s) -
Luo Mi,
Zhang Maolin,
Yan Wensheng,
Wang Lihua,
Jiang Zheng
Publication year - 2018
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/jace.15353
Subject(s) - cobalt , pigment , absorption edge , octahedron , absorption spectroscopy , absorption (acoustics) , materials science , spectroscopy , spinel , chemistry , crystallography , nuclear chemistry , inorganic chemistry , crystal structure , optics , band gap , metallurgy , organic chemistry , physics , optoelectronics , quantum mechanics , composite material
A series of cobalt blue pigments, which were synthesized based on the chemical compositions of the blue pigments in Kangxi blue and white porcelain, were investigated by Co, Mn, and Fe K‐edge and L 2,3 ‐edge X‐ray absorption spectroscopy to determine the oxidation states and species of the elements and to discern their impact on the blue color. The results reveal that Co is bivalent and mainly located at tetrahedral sites, which is the main parameter controlling the blue color. Mn is mainly present as Mn 2+ , or Co x Zn 1‐x Al 2 O 4 and Fe is mainly present as Fe 3+ . In particular, Fe 3+ substitutes the Al in CoAl 2 O 4 and occupies octahedral sites with a high Mn content. All the synthetic cobalt blue pigments can form a solid solution with various end‐members or an intermediate solution spinel. The spectroscopic determination of the oxidation states and speciation of Co, Mn, and Fe furthers understanding of the coloration of blue pigments in blue and white porcelain.