Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 30, Issue 12, Pages 2443-2449Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2010.04.030
Keywords
Optical properties; Glass; Al(2)O(3); Electron microscopy; Ceramic frits
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Funding
- FAPESP [06/53665-6]
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Transparency is an extremely important optical property of several glazes used in the ceramic tile sector. The present work aimed to identify the causes of loss of transparency presented by some ceramic glazes composed of frits with chemical compositions typical of optically transparent glasses. After identifying the causes of low transparency presented by several ceramic glazes based on microstructural analyses, X-ray diffraction and scanning electron microscopy, attempts were made to increase the transparency of these glazes by altering their chemical compositions. The results suggest that the addition of alumina through distinct mineral sources may be an interesting alternative to prevent the crystallization of calcium silicates, which reduce the transparency of glazes used in the ceramic tile sector. (C) 2010 Elsevier Ltd. All rights reserved.
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