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Publication
Ascertaining the degradation state of ceramic tiles : a preliminary non-destructive step in view of conservation treatments
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Advisor(s)
Abstract(s)
Conserving the cultural heritage is a general concern and the use of non-destructive techniques to characterize ancient materials is important. Serious deterioration effects in environmentally exposed ancient glazed ceramic tiles arise from the development of micro-organisms (algae/fungi) within the pore system. Subsequent biodegradation processes are particularly harmful once the decorated glaze is damaged by exfoliation/detachment.
Three case studies will be addressed: Portuguese polychrome decorated tiles from the interior of two churches (16th–17th century) and from the outdoor of a Palace (18th century). Small tile fragments were directly irradiated in a wavelength-dispersive X-ray fluorescence spectrometer for glaze chemical characterization and subsequently irradiated in a powder diffractometer to assess the phase constitution of both glaze and ceramic body.
Cleaning and conserving these ancient cultural artifacts involve a decontamination process applying innovative non-destructive techniques. The present work is intended as a contribution to diagnose the actual degradation state of ancient tiles in view of future decontamination actions using gamma radiation.
Description
Keywords
Património cultural Degradação Patologias Cerâmica Azulejo Fluorescência de raios-X Espectrometria de raios X
Citation
Silva, Teresa P.; Figueiredo, Maria Ondina, Prudêncio, Maria Isabel - Ascertaining the degradation state of ceramic tiles : a preliminary non-destructive step in view of conservation treatments. In: Applied Clay Science, vol. 82 (September 2013), p. 101-105