Ceramics-Silikáty 52, (2) 77 - 84 (2008) |
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THE EFFECT OF CRYSTALLIZATION ON THE BASICITY IN THE SYSTEM Li₂O–2SiO₂
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Capatina Camelia 1, Simonescu Claudia Maria 2
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1 Constantin Brâncusi University of Tg-Jiu, Engineering Faculty, 3 Geneva Street, 210152, Târgu-Jiu, Gorj, Romania
2 Department of Inorganic Technology and Environmental Protection, Faculty of Applied Chemistry and Materials Science,
Politechnica University of Bucharest, 1-7 Polizu Street, 011061, Bucharest, Romania
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Keywords: pB basicity percentage, Crystallization, Cu(II), Crystallites
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The paper presents the study of the crystallization influence on the basicity in the Li₂O · 2SiO₂ glass. The quantitative methods
were used for the basicity determination of the oxide glasses. The Li₂O–2SiO₂ samples were thermally treated at 560°C,
for 20, 30, 55, 95 minutes in presence and in absence of Cu²⁺ as indicator. The experimental results showed that when the
crystallinity degree increases, the wavenumber of the Cu²⁺ absorption decreases corresponding to a higher basicity of samples.
It was observed an increasing of the maximum diameter of crystallites and a decreasing of the crystallization speed with
the extension of the thermal treatment time at 560°C. |
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