Abstract
This work presents the results of the exposure of soda-lime, potash-lime and mixed-alkali silicate glasses during ten and twenty months in different Portuguese monuments with historical stained-glass windows to characterize the influence of local environmental conditions. The glass samples were exposed in the Monastery of Batalha (Batalha), the Monastery of Jerónimos (Lisbon), and the Cathedral of Évora (Évora). A set of analytical techniques to assess the physicochemical effects were used, including optical microscopy and Fourier transform infrared spectroscopy. All the samples presented crystalline deposits on their surface; however, their quantity and nature depended on the atmospheric conditions during the days before the collection. Potash-lime silicate glass was the most altered glass in comparison with soda-lime and mixed-alkali silicate glasses. The samples from the Cathedral of Évora showed a high content of dust and salts on their surface but without severe chemical pathologies; however, those samples exposed in the Monastery of Jerónimos and the Monastery of Batalha presented alteration layers due to a high humidity environment.
Funder
Fundação para a Ciência e a Tecnologia
Subject
Materials Science (miscellaneous),Archeology,Conservation
Reference44 articles.
1. In search of Luís Alemão. Stained glass in Germany from 1400 till 1460 and the fragments in Batalha;Hess,2000
2. História de S. Domingos by Fr. Luís de Sousa, 1623 (re-edition);Lopes De Almeida,1997
3. Weathering Phenomena on Naturally Weathered Potash-Lime-Silica-Glass with Medieval Composition Studied by Secondary Electron Microscopy and Energy Dispersive Microanalysis
4. Influence of polluted urban atmosphere on the weathering of low durability glasses;Munier;Glass Technol.,2002
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