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Sol-gel preparation and high-energy XRD study of (CaO)(x)(TiO2)(0.5-x)(P2O5)(0.5) glasses (x=0 and 0.25)

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Pickup, David M., Wetherall, Kate M., Knowles, Jonathan C., Smith, Mark E. and Newport, Robert J. (2008) Sol-gel preparation and high-energy XRD study of (CaO)(x)(TiO2)(0.5-x)(P2O5)(0.5) glasses (x=0 and 0.25). In: 21st European Conference on Biomaterials, Brighton, England, Sep 09-13, 2007. Published in: Journal of Materials Science: Materials in Medicine, Volume 19 (Number 4). pp. 1661-1668.

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Official URL: http://dx.doi.org/10.1007/s10856-007-3259-3

Abstract

Glasses from the CaO-TiO2-P2O5 system have potential use in biomedical applications. Here a method for the sol-gel synthesis of the ternary glass (CaO)(0.25)(TiO2)(0.25)(P2O5)(0.5) has been developed. The structures of the dried gel and heat-treated glass were studied using high-energy X-ray diffraction. The structure of the binary (TiO2)(0.5)(P2O5)(0.5) sol-gel was studied for comparison. The results reveal that the heat-treated (CaO)(0.25)(TiO2)(0.25)(P2O5)(0.5) glass has a structure based on chains and rings of PO4 tetrahedra, held together by a combination of electrostatic interaction with Ca2+ ions and by corner-sharing oxygen atoms with TiO6 octahedra. In contrast, the (TiO2)(0.5)(P2O5)(0.5) glass has a structure based on isolated P2O7 units linked together by corner-sharing with TiO6 groups. The results suggest that both the dried gels possess open porous structures. For the (CaO)(0.25)(TiO2)(0.25)(P2O5)(0.5) sample there is a significant increase in Ca-O coordination number with heat treatment.

Item Type:

Conference Item (UNSPECIFIED)

Subjects:

Q Science > QD Chemistry

Divisions:

Administration > Vice Chancellor's Office
Faculty of Science > Physics

Library of Congress Subject Headings (LCSH):

Colloids, X-rays -- Diffraction, Glass -- Thermal properties, Calcium phosphate, Titanium

Journal or Publication Title:

Journal of Materials Science: Materials in Medicine

Publisher:

Springer New York LLC

ISSN:

0957-4530

Official Date:

April 2008

Dates:

Date	Event
April 2008	Published

Volume:

Volume 19

Number:

Number 4

Number of Pages:

Page Range:

pp. 1661-1668

Identification Number:

10.1007/s10856-007-3259-3

Status:

Peer Reviewed

Publication Status:

Published

Access rights to Published version:

Restricted or Subscription Access

Description:

Selected Papers from the 21st European Conference on Biomaterials, Brighton, UK, 9-13 September 2007. Guest Editors: Andrew Lloyd and Matteo Santin

Funder:

Engineering and Physical Sciences Research Council (EPSRC)

Grant number:

EP/C000714, EP/C000633 and GR/T21080 (EPSRC)

Title of Event:

21st European Conference on Biomaterials

Type of Event:

Conference

Location of Event:

Brighton, England

Date(s) of Event:

Sep 09-13, 2007

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