Composition and Phase Analysis on Glazed Tiles of Southeast Anatolia: Production Process Identification

Dabanlı, Ömer; Yildiz, Dursun; Bayazit, Murat

doi:10.5281/zenodo.5545709

Cited by 1 publication

(2 citation statements)

References 31 publications

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“…Carbonate vibrations at 1794, 1430, 876, and 712 cm −1 are absent, suggesting the use of purified clay with low limestone content and high firing temperatures [21]. Smaller signals belonging to quartz (1164, 1086, 795, 781, 694, 449 cm −1 ), hematite (596, 529 cm −1 ), kaolinite (439 cm −1 ), and feldspars (1053, 729, 721, 645, 606, 589, 581, 464 cm −1 ) were individuated by using second derivatives [34], confirming the Raman spectroscopy results. The presence of hematite may indicate an oxidizing atmosphere in the kiln.…”

Section: Spectroscopic Investigation Of Old Tilesmentioning

confidence: 99%

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Tiles from Aosta: A Peculiar Glaze Roof Covering

Balliana,

Caveri,

Falchi

et al. 2023

Colorants

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The 18th century roof tiles from the “Casa delle vigne”, located in the Aosta region (north-east Italy), were investigated as an example of a peculiar historical roof covering: ceramic tiles with a lead-based glaze finishing to waterproof them are used to create colourful patterns. A conservation project proposed the integration of the original tiles with new ones, produced according to traditional methods. Ancient and new tiles were analysed with Fiber Optics Reflectance Spectroscopy, micro-Raman, Fourier Transform Infrared Spectroscopy and X-ray Fluorescence Spectrometry, Thermogravimetry and Differential Scanning Calorimetry for understanding the composition and the production technology of this manufacture. Their resistance to freezing and thawing cycles was then tested, considering their exposure in the severe alpine climate of Aosta. The use of pure clays with low calcium contents, high firing temperature and lead-rich glazes was found in ancient tiles, able to outstand several freezing-thawing cycles without damages. Iron and copper pigments were used in old yellow and green glazes. Zinc-based pigment, low lead and calcium-rich glazes are used in the new ones, which remained mainly coherent to the ceramic body during the freeze-thaw test.

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Section: Spectroscopic Investigation Of Old Tilesmentioning

confidence: 99%

“…Under 100 • C, absorbed water is lost. Between 200 • C and 250 • C, bound water, namely interlayer hydrated cations, is lost [19,20,34]. Two correspondent endothermic peaks are centred at 60 • C and 220 • C for the old tiles, respectively.…”

Section: Tg-dscmentioning

confidence: 99%