Thermal behaviour of glazed ceramic bodies

Kolářová, Mária; Kloužková, Alexandra; Kloužek, Jaroslav; Schwarz, Jiří

doi:10.1007/s10973-020-09484-3

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…The dilatometric softening points ( T d ) are the temperatures at the curve maxima. The relative analytical uncertainty (1 σ ) for each expansion measurement is ±2%; determined using experimental counting statistics as shown by Kolářová et al 44 …”

Section: Resultsmentioning

confidence: 99%

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Effect of network connectivity on behavior of synthetic Broborg hillfort glasses

et al. 2022

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There is wide industrial interest in developing robust models of long-term (>100 years) glass durability. Archeological glass analogs, glasses of similar composition, and alteration conditions to those being tested for durability can be used to evaluate and inform such models. Two such analog glasses from a 1500-This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Resultsmentioning

confidence: 99%

“…Dilatometric measurements were performed with a LINSEIS L75 HS 1600C PT dilatometer (Germany) using 20‐mm long by 5‐mm diameter glass cylinders heated at 10 K min −1 from room temperature to their dilatometric softening points in a He atmosphere (99.999% pure, L/100 L), as previously described by Kolářová et al 44 …”

Section: Methodsmentioning

confidence: 99%

Effect of network connectivity on behavior of synthetic Broborg hillfort glasses

et al. 2022

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“…The concentration of corrosive media and conditions of elevated temperature and pressure were chosen based on previous pilot studies [19][20][21] and comparison with other studies [9,12,16,[22][23][24]. A simple corrosive system of nitric acid solution simulates nitrates in the soil that surrounds the archaeological finds and the aqueous solution of acetic acid represents corrosion in complex organic acids and could be selected as a substitute for humic acids.…”

Section: Corrosion Test Proceduresmentioning

confidence: 99%

Interaction of Historical Lead Glazes With Corrosive Media

Kolářová¹

2021

Ceramics - Silikaty

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Lead glasses and glazes are often discussed in terms of degradation processes in connection with their wide use in the field of cultural heritage in historical objects of low-fired glazed ceramics and historical glasses. This work is focused on the evaluation of the interaction of lead glazes with a corrosive media simulating environment of waste pits, deposits and possibly inappropriate conservation interventions. The first part of the experiment contains surface characterisation of several archaeological fragments of glazed ceramics. Two model lead silicate fritted glazes for corrosion tests were prepared based on their compositions. A system based on nitric acid solution simulates nitrates in the soil that surround the archaeological finds, and the aqueous solution of acetic acid represents corrosion in complex organic acids and humic acids. The concentration of Pb and Si was determined in corrosive solution by AAS. Precipitates were identified by optical microscopy (OM) and were examined via XRD and SEM-EDS analyses. Vibrational spectroscopy (ATR, Raman) proved that the proportion of Pb representing a function of network former decreases with time. The shift to higher wavelengths indicates a change in Q motifs in the glass structure of the glaze frits or a glass network transition from a Si-O-Pb-O-Si towards a Si-O-Si glass network.

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