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

被引：15

作者：

Wren, A. W. ^{[1
]}

Keenan, T. ^{[1
]}

Coughlan, A. ^{[1
]}

Laffir, F. R. ^{[2
]}

Boyd, D. ^{[3
]}

Towler, M. R. ^{[1
,4
]}

Hall, M. M. ^{[1
]}

机构：

[1] Alfred Univ, Inamori Sch Engn, Alfred, NY 14802 USA

[2] Univ Limerick, Mat & Surfaces Sci Inst, Limerick, Ireland

[3] Dalhousie Univ, Dept Appl Oral Sci, Halifax, NS, Canada

[4] Univ Malaya, Dept Biomed Engn, Kuala Lumpur, Malaysia

来源：

JOURNAL OF MATERIALS SCIENCE | 2013年 / 48卷 / 11期

关键词：

NUCLEAR-MAGNETIC-RESONANCE; RAMAN-SPECTROSCOPY; CERAMIC SCAFFOLDS; SILICATE-GLASSES; IONOMER GLASSES; GALLIUM; ALUMINUM; MELTS; BIOGLASS(R); VISCOSITY;

D O I：

10.1007/s10853-013-7211-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structural role of Gallium (Ga) is investigated when substituted for Zinc (Zn) in a 0.42SiO(2)-0.40-xZnO-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.

引用

页码：3999 / 4007

页数：9

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[11] Surface functionalization of Bioglass®-derived porous scaffolds [J].