Characterisation of Ga2O3–Na2O–CaO–ZnO–SiO2 bioactive glasses

The structural role of Gallium (Ga) is investigated when substituted for Zinc (Zn) in a 0.42SiO 2 –0.40– x ZnO–0.10Na 2 O–0.08CaO glass series, (where x  = 0.08). Each starting material was amorphous, and the network connectivity (NC) was calculated assuming Ga acts as both a network modifier (1.23)...

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Published in:Journal of materials science 2013-06, Vol.48 (11), p.3999-4007
Main Authors: Wren, A. W., Keenan, T., Coughlan, A., Laffir, F. R., Boyd, D., Towler, M. R., Hall, M. M.
Format: Article
Language:English
Subjects:
Amorphous materials
Bioglass
Characterization and Evaluation of Materials
Chemical equilibrium
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Gallium oxides
Materials Science
NMR
Nuclear magnetic resonance
Organic chemistry
Photoelectrons
Polymer Sciences
Raman spectroscopy
Silicon dioxide
Solid Mechanics
Spectrum analysis
Zinc oxide
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cited_by cdi_FETCH-LOGICAL-c316t-8e3ae44a77f125647c3eeb412b743e6a9bbf3a088dc1eab3377ca26a56945e573
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container_issue 11
container_start_page 3999
container_title Journal of materials science
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creator Wren, A. W.
Keenan, T.
Coughlan, A.
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Boyd, D.
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Hall, M. M.
description The structural role of Gallium (Ga) is investigated when substituted for Zinc (Zn) in a 0.42SiO 2 –0.40– x ZnO–0.10Na 2 O–0.08CaO glass series, (where x  = 0.08). Each starting material was amorphous, and the network connectivity (NC) was calculated assuming Ga acts as both a network modifier (1.23), and also as a network former. Assuming a network forming role for Ga the NC increased with increasing Ga concentration throughout the glass series ( Control 1.23, TGa - 1 2.32 and TGa - 2 3.00). X-ray photoelectron spectroscopy confirmed both composition and correlated NC predictions. Raman spectroscopy was employed to investigate Q-structure and found that a shift in wavenumbers occurred as the Ga concentration increased through the glass series, from 933, 951 to 960 cm −1 . Magic angle spinning nuclear magnetic resonance determined a chemical shift from −73, −75 to −77 ppm as the Ga concentration increased, supporting Raman data. These results suggest that Ga acts predominantly as a network former in this particular Zn-silicate system.
doi_str_mv 10.1007/s10853-013-7211-2
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subjects Amorphous materials
Bioglass
Characterization and Evaluation of Materials
Chemical equilibrium
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Gallium oxides
Materials Science
NMR
Nuclear magnetic resonance
Organic chemistry
Photoelectrons
Polymer Sciences
Raman spectroscopy
Silicon dioxide
Solid Mechanics
Spectrum analysis
Zinc oxide
title Characterisation of Ga2O3–Na2O–CaO–ZnO–SiO2 bioactive glasses
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