Degradation properties and microstructural analysis of 40P 2O5-24MgO-16CaO-16Na2O-4Fe2O 3 phosphate glass fibres

Papia Haque*, Ifty Ahmed, Andrew Parsons, Reda Felfel, Gavin Walker, Chris Rudd

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

The paper describes the physical, chemical, mechanical and thermal properties of 40P2O5-24MgO-16CaO-16Na2O- 4Fe2O3 phosphate glass fibres. The initial mechanical properties of the fibres were determined to examine changes of these properties over time and also due to the variation of fibre diameter. A theoretical chain length of the fibres is calculated and that was validated using high resolution X-ray photoelectron spectroscopy (XPS) analysis. These fibres were degraded for 12 weeks in deionised water with pH adjusted to ~ 7.4 at 37 C. Mass loss percentage, change of pH, degradation rate and the mechanical properties of the degraded fibres were determined. An XPS analysis of the 12 week degraded fibre was conducted without etching and after 40 min etching from the degraded surface. The elemental percentages of fibres degraded for different time periods were determined using energy dispersive X-ray (EDX) analysis. Scanning electron microscopy (SEM) analysis of the non-degraded and degraded fibres was also presented in order to assess changes in the fibre surface during degradation. The evolving surface of these water-soluble fibres was further characterised by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The works completely elucidated the chemical nature and degradation pattern of the bulk fibre surface of this glass composition.

Original languageEnglish
Pages (from-to)99-109
Number of pages11
JournalJournal of Non-Crystalline Solids
Volume375
Early online date12 Jun 2013
DOIs
Publication statusPublished - 1 Sept 2013

Keywords

  • chemical analysis
  • degradation properties
  • mechanical properties
  • phosphate glass

Fingerprint

Dive into the research topics of 'Degradation properties and microstructural analysis of 40P 2O5-24MgO-16CaO-16Na2O-4Fe2O 3 phosphate glass fibres'. Together they form a unique fingerprint.

Cite this