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- Title
Copper red glazes: a coating with two families of particles.
- Authors
Cuvelier, P.; Andraud, C.; Chaudanson, D.; Lafait, J.; Nitsche, S.
- Abstract
In order to explain the origin of the deep red color of copper glazes on ceramics, a ceramist has elaborated, by firing under reducing atmosphere, a significant number of tiles. The analysis of the structure and composition of a representative sample by transmission electron microscopy and electron energy loss spectroscopy, followed by an optical characterization and an optical modeling using the radiative transfer approach (four-flux model), have enabled a comprehensive explanation of the origin of the color in these glazes: the presence of two families of copper nanoparticles in the vitreous matrix. The first, purely absorbing, of diameter 10-50 nm, essentially creates color by a subtractive process. The second, due to its larger diameter, 100 nm or more, mainly acts on color by scattering of the visible light. Both act competitively in the layer. A color chart of all the hues which can be reached by this technique has eventually been theoretically calculated.
- Subjects
COPPER glazes; SURFACE coatings; CERAMIC materials; COLOR; TRANSMISSION electron microscopy; MOLECULAR structure; ELECTRON energy loss spectroscopy; RADIATIVE transfer
- Publication
Applied Physics A: Materials Science & Processing, 2012, Vol 106, Issue 4, p915
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-011-6707-3