Sol-gel preparation and high-energy XRD study of (CaO)(x)(TiO2)(0.5-x)(P2O5)(0.5) glasses (x=0 and 0.25)
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.Full text not available from this repository.
Official URL: http://dx.doi.org/10.1007/s10856-007-3259-3
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|
|Official Date:||April 2008|
|Number of Pages:||8|
|Page Range:||pp. 1661-1668|
|Access rights to Published version:||Restricted or Subscription Access|
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|
1. M. NAVARRO, E. S. SANZANA, J. A. PLANELL, M. P.
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