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http://hdl.handle.net/10773/20150
Título: | Apatite crystallization from glasses in the Ca-5(PO4)(3)F-CaAl2Si2O8-CaMgSi2O6-NaAlSi3O8 system |
Autor: | Fernandes, Hugo R. Tulyaganov, Dilshat U. Ribeiro, Manuel J. Ferreira, Jose M. F. |
Palavras-chave: | CRYSTAL-GROWTH CERAMICS FLUOROAPATITE GLAZES LASER K2O NMR |
Data: | 2013 |
Editora: | ELSEVIER SCIENCE BV |
Resumo: | The aim of the present study is to investigate the apatite formation process from glasses in the fluorapatite-diopside-anorthite-albite system. The effects of partial and total replacement of anorthite fraction by albite in the ternary composition 26 Ca-5(PO4)(3)F-44 CaAl2Si2O8-30. CaMgSi2O6 (wt.%) on the properties of glasses and glass-ceramics were evaluated. The scanning electron microscopy (SEM) examination of glasses revealed the precipitation of a nanosize droplet phase in the glassy matrices suggesting the occurrence of amorphous phase separation in all annealed glasses. An overall trend towards polymerization of the glass network with increasing albite content was demonstrated by employing MAS-NMR and FTIR spectroscopy. X-ray diffraction (XRD) and differential thermal analysis (DTA) were used to assess the effect of albite content on the devitrification process and formation of fluorapatite crystalline phase (Ca-5(PO4)(3)F). (C) 2012 Elsevier B.V. All rights reserved. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20150 |
DOI: | 10.1016/j.jnoncrysol.2012.11.052 |
ISSN: | 0022-3093 |
Versão do Editor: | 10.1016/j.jnoncrysol.2012.11.052 |
Aparece nas coleções: | CICECO - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Apatite crystallization from glasses in the Ca5(PO 4)3F-CaAl2Si2O8- CaMgSi2O6-NaAlSi3O8 system_10.1016j.jnoncrysol.2012.11.052.pdf | 897.34 kB | Adobe PDF |
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