KSbOSiO$_4$ microcrystallites as a source of corrosion of blue-green lead-potassium glass beads of the 19th century
| Autor: | I. B. Afanasyev, Tatyana V. Yuryeva, V. S. Popov, I. F. Kadikova, E. A. Morozova, V. A. Yuryev |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Condensed Matter - Materials Science
Materials science 060102 archaeology Scanning electron microscope Potassium Lead (sea ice) General Physics and Astronomy chemistry.chemical_element Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 06 humanities and the arts 02 engineering and technology 021001 nanoscience & nanotechnology Microanalysis Corrosion Chemical engineering chemistry Phase composition Glass corrosion 0601 history and archaeology Crystallite 0210 nano-technology |
| Popis: | Presently, deterioration of glass beads is a significant problem in conservation and restoration of beaded exhibits in museums. Glass corrosion affects nearly all kinds of beads but cloudy blue-green ones are more than others subjected to disastrous destruction. However, physical and chemical mechanisms of this phenomenon have not been understood thus far. This article presents results of a study of elemental and phase composition of glass of the blue-green beads of the 19th century obtained from exhibits kept in Russian museums. Using scanning electron microscopy, X-ray microanalysis and X-ray powder analysis we have detected and investigated Sb-rich microinclusions in the glass matrix of these beads and found them to be micro crystallites of KSbSiO$_5$. These crystallites were not detected in other kinds of beads which are much less subjected to corrosion than the blue-green ones and deteriorate in a different way. We belive that individual precipitates of KSbSiO$_5$ and especially their clusters play a major role in the blue-green bead deterioration giving rise to slow internal corrosion of the bead glass. A version accepted to the Journal of Applied Physics. The title has been changed. The previous title (1609.02101v1) was "A study of deterioration and destruction of historic blue-green glass beads of the 19th century: identification of microcrystallites in the glass matrix". Corrected typos |
| Databáze: | OpenAIRE |
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