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http://hdl.handle.net/10773/5340
Título: | Using phase diagrams to deal with moisture expansion |
Autor: | Segadães, Ana M. Carvalho, M. Arlete Ferreira, Heber C. |
Palavras-chave: | Lifetime (Moisture expansion) Traditional ceramics Structural applications |
Data: | 2003 |
Editora: | Elsevier |
Resumo: | Consensus has it that the post-fabrication moisture expansion of fired clay-based materials is governed by the presence of amorphous and/or vitreous phases. In this work, very simple calculations using the lever rule and the phase diagram of the Al2O3-SiO2-K2O (A-S-K) system, were used to show that the experimentally observed dependencies between moisture expansion and the A/S and K/A weight ratios in clay-based compositions can be correlated with the amount of liquid phase formed during the initial melting of the composition, which remains in the fired body as a vitreous phase. This correlation might, if judiciously used, help ceramists in the choice of additives and/or processing conditions, while avoiding changes in the firing temperatures. Also, the results obtained throw a sharper light in the dual and, in this respect, antagonistic role played by the liquid phase during firing. (C) 2003 Elsevier Ltd and Techna S.r.l. All rights reserved. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/5340 |
DOI: | 10.1016/S0272-8842(03)00051-8 |
ISSN: | 0272-8842 |
Aparece nas coleções: | DEMaC - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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CerInt 29(2003)947–954.pdf | Documento principal | 376.29 kB | Adobe PDF |
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