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Issue 9, 2011
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Co speciation in blue decorations of blue-and-white porcelains from Jingdezhen kiln by using XAFS spectroscopy

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Abstract

Co K-edge XAFS measurements were carried out to characterize the oxidation state and chemical environment of cobalt element in the blue decorations of blue-and-white porcelains manufactured by Jingdezhen official kiln during Yuan and Ming dynasties with the aim to investigate its coloring mechanism. XANES spectra showed that cobalt was present as both divalent and trivalent ions and the ratios of Co2+/Co3+ were almost similar for all samples with different historical periods. EXAFS analysis indicated that cobalt atom was situated in both octahedral and tetrahedral sites. Considering the empirical optical absorption in visible region, it was assumed that divalent ions located at tetrahedral sites made the main contribution to the blue color.

Graphical abstract: Co speciation in blue decorations of blue-and-white porcelains from Jingdezhen kiln by using XAFS spectroscopy

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Publication details

The article was received on 14 Dec 2010, accepted on 15 Apr 2011 and first published on 23 May 2011


Article type: Paper
DOI: 10.1039/C0JA00240B
J. Anal. At. Spectrom., 2011,26, 1796-1801

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    Co speciation in blue decorations of blue-and-white porcelains from Jingdezhen kiln by using XAFS spectroscopy

    L. Wang and C. Wang, J. Anal. At. Spectrom., 2011, 26, 1796
    DOI: 10.1039/C0JA00240B

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