Sol-gel synthesis and structural characterisation of P2O5-B2O3-Na2O glasses for biomedical applications

Carta, Daniela and Knowles, Jonathan C. and Guerry, Paul and Smith, Mark E. and Newport, Robert J. (2009) Sol-gel synthesis and structural characterisation of P2O5-B2O3-Na2O glasses for biomedical applications. Journal of Materials Chemistry, 19 (1). pp. 150-158. ISSN 0959-9428. (Full text available)

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http://dx.doi.org/10.1039/b813288g

Abstract

Glasses in the system 40(P2O5)-x(B2O3)-(60-x)(Na2O) (10 <= x <= 25 mol%) were prepared by the sol gel technique. A mixture of mono- and diethylphosphates was used as precursor for P2O5, boric acid and sodium methoxide were used as source compounds for B2O3 and Na2O, respectively. The dried gels obtained were heat treated at 200, 300 and 400 degrees C. Structural development occurring during heat treatment and changes with composition were investigated using X-ray diffraction, thermal analysis, infrared spectroscopy, B-11 and P-31 solid state NMR. Systems with x = 20 and x = 25 mol% are amorphous up to 400 degrees C, whereas systems with lower B2O3 content are partially crystalline. This work extends sol-gel preparation of amorphous borophosphate systems having P2O5 as the main component.

Item Type: Article
Additional information: Funding agency The University of Kent The Eastman Dental Institute (University College London) University of Warwick Grant number (from University of Warwick) EP/C000714/1 GR/T21080/1 EP/C000633/1
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User: J.M. Smith
Date Deposited: 14 May 2009 14:28
Last Modified: 02 May 2014 16:01
Resource URI: http://kar.kent.ac.uk/id/eprint/15874 (The current URI for this page, for reference purposes)
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