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Polymerisation Degree and Raman Identification of Ancient Glasses used for Jewellery, Ceramics Enamels and Mosaics | | Philippe Colomban
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17 Jan 2007 | | Journal: | Journal of Non Crystalline Solids 323 (2003) 180-187 | | Subject: | Materials Science | | Abstract: | We demonstrate the utility of Raman spectroscopy as a technique for the identification of ancient glasses and enamel coatings of ceramics. As for any silicate glasses, the addition of network modifiers breaks the Si-O linkages and modifies the degree of polymerisation and hence the relative intensity of the Si-O bending and stretching modes. We demonstrate empirically that the ratio of these envelopes is well correlated to the glass structure and to the used firing technology. Spectral Qn components assigned to isolated and connected SiO4 vibrational units allow more precise analysis. Selected porcelains, faiences, potteries and glasses representative of the different Asian, Islamic and European production technologies were studied. Modern porcelain enamels are used as compositional references. | | Source: | arXiv, cond-mat/0701414 | | Services: | Forum | Review | PDF | Favorites | |
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