Pickup, David M. and Wetherall, Kate M. and Knowles, Jonathan C. and 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). Journal of Materials Science: Materials in Medicine, 19 (4). pp. 1661-1668. ISSN 0957-4530
Full text not available from this repository.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: | Article |
|---|---|
| Journal or Publication Title: | Journal of Materials Science: Materials in Medicine |
| Subjects: | UNSPECIFIED |
| Departments: | VC's Office |
| ID Code: | 52933 |
| Deposited By: | ep_importer_pure |
| Deposited On: | 29 Feb 2012 09:25 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 20:11 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/52933 |
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