0567751 - ÚSMH 2024 RIV CH eng J - Journal Article
Kolářová, M. - Kloužková, A. - Kohoutková, M. - Kloužek, Jaroslav - Dvořáková, P.
Degradation Processes of Medieval and Renaissance Glazed Ceramics.
Materials. Roč. 16, č. 1 (2023), č. článku 375. E-ISSN 1996-1944
Institutional support: RVO:67985891
Keywords : archaeological lead-glazed ceramics * archaeometric characterisation * degradation * glaze fit
OECD category: Ceramics
Impact factor: 3.4, year: 2022
Method of publishing: Open access
https://doi.org/10.3390/ma16010375

Corrosion effects in deposit environments (soil, waste pit, etc.), together with the glaze adherence and fit, could cause severe deterioration accompanied by different types of defects or growth of corrosion products. The aim of this work was to identify the source of surface degradation of the lead-glazed ceramics sets from the Prague area from the Romanesque to the Renaissance period. A combination of X-ray fluorescence (XRF), X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS), and simultaneous thermal analysis (STA) techniques along with stress state calculations was used to study the defects. Based on the interpretation of the possible sources of the observed defects, four types of degradation effects were schematically expressed for the archaeological samples. It was shown that the glazes were already appropriately chosen during the production of the Romanesque tiles and that their degradation occurred only due to long-term exposure to unsuitable environmental conditions.
Permanent Link: https://hdl.handle.net/11104/0342256