Ceramics-Silikáty 49, (4) 283 - 286 (2005) |
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THE STUDY OF COPPER RUBY GLASS |
Capatina Camelia |
University "Constantin Brâncusi" of Tg-Jiu, Faculty of Engineering, Geneva, No 3, 210152, Gorj, Romania
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Keywords: Copper ruby, Alloy, Melting, Red color |
The tendency of removing Cd from the production of red glasses comes from its toxicity. One of the alternatives is the copper
ruby glass, but in this case, the formation of colloidal aggregates of CuO demands the use of efficient reductants. The paper
focuses the development of copper ruby glass in the presence of Cu–Sn alloy. The study deals with the effect of melting temperature,
holding time, and a subsequent heat treatment on the formation of CuO aggregates. The measurement of spectral
transmission of prepared glasses showed that increasing melting temperature and holding time bring more intensive glass
color indicated by an increase in the amplitude of the absorption maximum. Subsequent heat treatment of glass samples in
the temperature interval 530-570°C makes an increase of absorption maximum with increasing temperature. Prolonged time
of heat treatment at 570°C brings more intensive color up to 90 minutes. During longer heating the oxidation of CuO prevails,
which leads to the color degradation. |
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