Raman identification of the different glazing technologies of Blue-and-White Ming porcelains
Autor: | Anh-Tu Ngo, Linda C. Prinsloo, Philippe Colomban, Howell G. M. Edwards, L. Valérie Esterhuizen |
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Přispěvatelé: | De la Molécule aux Nanos-objets : Réactivité, Interactions et Spectroscopies (MONARIS), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), University of Bradford, University of the Witwatersrand [Johannesburg] (WITS) |
Rok vydání: | 2022 |
Předmět: |
Anatase
Materials science Mullite 02 engineering and technology engineering.material 01 natural sciences Wollastonite Raman microspectroscopy symbols.namesake chemistry.chemical_compound Materials Chemistry [CHIM]Chemical Sciences Quartz Process Chemistry and Technology 010401 analytical chemistry Glaze Metallurgy Cobalt 021001 nanoscience & nanotechnology Silicate 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Blue chemistry Porcelain Ceramics and Composites engineering symbols 0210 nano-technology Raman spectroscopy Composition Black spot |
Zdroj: | Ceramics International Ceramics International, Elsevier, 2022, 48 (2), pp.1673-1681. ⟨10.1016/j.ceramint.2021.09.246⟩ |
ISSN: | 0272-8842 |
Popis: | International audience; Shards of Blue-and-White Ming porcelain from shipwrecks of Portuguese ships found on the coasts of South Africa plus a shard from Mombasa (Kenya) were analyzed by optical microscopy, SEM-EDS and Raman microspectroscopy (458 nm). Whereas the Raman signature of porcelain body paste compositions which are based on mullite, quartz and an amorphous phase with the minor presence of anatase and feldspar are very comparable whatever the variable alumina content, at least two types of glazes are observed: a high-temperature soda-potassium glaze, and glazes richer in calcium and similar to a celadon glaze (with the possibility of wollastonite formation). The blue decoration is obtained with a material rich in manganese typical of the Ming productions. Some shards exhibit a two-layer glaze and the blue decoration is either placed under-glaze, or in-glaze as found in the Vietnamese productions of the same period. Previous assignments of the Raman signature of feldspar to cobalt aluminate are now not favoured (blue colour is obtained with Co2+ ions dissolved in the glassy silicate) and several black spots exhibit the characteristic spectrum of an epsilon Fe2O3 phase being present. |
Databáze: | OpenAIRE |
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