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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. ISSN 0957-4530. doi:10.1007/s10856-007-3259-3
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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) | ||||
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| Subjects: | Q Science > QD Chemistry | ||||
| Divisions: | Administration > Vice Chancellor's Office Faculty of Science > Physics |
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| 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: |
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| Volume: | Volume 19 | ||||
| Number: | Number 4 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | pp. 1661-1668 | ||||
| DOI: | 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 |
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| 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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