Apatite crystallization from glasses in the Ca-5(PO4)(3)F-CaAl2Si2O8-CaMgSi2O6-NaAlSi3O8 system

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abstract

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.

keywords

CRYSTAL-GROWTH; CERAMICS; FLUOROAPATITE; GLAZES; LASER; K2O; NMR

subject category

Materials Science

authors

Fernandes, HR; Tulyaganov, DU; Ribeiro, MJ; Ferreira, JMF

our authors

foto Hugo Alexandre Gonçalves da Rocha Fernandes

Hugo Alexandre Gonçalves da Rocha Fernandes

Junior Researcher
foto José Maria da Fonte Ferreira

José Maria da Fonte Ferreira

Retired Professor

Groups

G3 - Electrochemical Materials, Interfaces and Coatings
G5 - Biomimetic, Biological and Living Materials

acknowledgements

Hugo R. Fernandes is grateful for the financial support of CICECO and for the PhD grant (SFRH/BD141307/2007) from the FCT, Portugal.

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Publication Details

type
Journal Article
year
2013
journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
volume
363
publisher
ELSEVIER SCIENCE BV
issn
0022-3093
digital object identifier
10.1016/j.jnoncrysol.2012.11.052
web of science article identifier
WOS:000315542400006

Journal Metrics (JCR 2019)

Journal Impact Factor
2.929
Journal Impact Factor (5 yrs)
2.653
category normalized journal percentile
71.855

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