Skip to content Skip to navigation
University of Warwick
  • Study
  • |
  • Research
  • |
  • Business
  • |
  • Alumni
  • |
  • News
  • |
  • About

University of Warwick
Publications service & WRAP

Highlight your research

  • WRAP
    • Home
    • Search WRAP
    • Browse by Warwick Author
    • Browse WRAP by Year
    • Browse WRAP by Subject
    • Browse WRAP by Department
    • Browse WRAP by Funder
    • Browse Theses by Department
  • Publications Service
    • Home
    • Search Publications Service
    • Browse by Warwick Author
    • Browse Publications service by Year
    • Browse Publications service by Subject
    • Browse Publications service by Department
    • Browse Publications service by Funder
  • Help & Advice
University of Warwick

The Library

  • Login
  • Admin

Calcium sulfate-phosphate composites with enhanced water resistance

Tools
- Tools
+ Tools

Fisher, Robin D., Hanna, John V., Rees, Gregory J. and Walton, Richard I. (2012) Calcium sulfate-phosphate composites with enhanced water resistance. Journal of Materials Chemistry, Vol.22 (No.11). pp. 4837-4846. doi:10.1039/c2jm15135a

Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1039/C2JM15135A

Request Changes to record.

Abstract

A novel method of processing gypsum, CaSO4·2H2O, is described, forming composites of calcium sulfate anhydrite crystallites bound by a water-resistant phosphate matrix. The materials have been characterised using various analytical techniques, including powder X-ray diffraction (PXRD), infrared spectroscopy, scanning electron microscopy and 31P solid-state nuclear magnetic resonance (NMR). While PXRD shows the major crystalline phase present in the composites is calcium sulfate anhydrite, the NMR shows the presence of a polyphosphate matrix, consistent with IR analysis. The NMR also allows the identification of an interfacial layer between the anhydrite crystallites and phosphate coating by comparison with the mixed sulfate-phosphate mineral ardealite, whose NMR spectra we also report. Comparison of conventional and proton-decoupled cross polarisation NMR spectra allows the presence and location of included protons to be probed. Physical measurements of mechanical strength show that addition of aluminium to the composite allows the formation of high density materials that have dry strength comparable to gypsum and no loss of strength on immersion in water.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Chemistry
Faculty of Science > Physics
Journal or Publication Title: Journal of Materials Chemistry
Publisher: Royal Society of Chemistry
ISSN: 0959-9428
Official Date: 21 March 2012
Dates:
DateEvent
21 March 2012Published
Volume: Vol.22
Number: No.11
Page Range: pp. 4837-4846
DOI: 10.1039/c2jm15135a
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

Data sourced from Thomson Reuters' Web of Knowledge

Request changes or add full text files to a record

Repository staff actions (login required)

View Item View Item
twitter

Email us: wrap@warwick.ac.uk
Contact Details
About Us