Probing crystallisation of a fluoro-apatite - mullite system using neutron diffraction

Abstract

Real-time small angle neutron scattering and wide angle neutron scattering studies were undertaken concurrently on a glass ionomer of nominal composition 4.5(SiO2)-3(Al2O3)-1.5(P2O5)-3(CaO)-2(CaF2). Neutron studies were conducted as a function of temperature to investigate the crystallisation process. No amorphous phase separation was observed at room temperature and the onset of crystallisation was found to occur at 650°C, which is 90°C lower than previously reported. The first crystalline phase observed corresponded to fluorapatite; it was only upon further heating was the mullite phase became present. The crystallite size at 650°C was found to be ~115Å and the result was consistent across all measurements.

Publication DOI: https://doi.org/10.1016/j.jnoncrysol.2016.05.019
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Materials Research (AIMR)
Additional Information: © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Funding: EPSRC (EP/F021011).
Uncontrolled Keywords: apatite,crystallisation,mullite,Condensed Matter Physics,Ceramics and Composites,Electronic, Optical and Magnetic Materials,Materials Chemistry
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2016-11-01
Published Online Date: 2016-05-25
Accepted Date: 2016-05-04
Submitted Date: 2015-12-22
Authors: Smith, J.M.
Martin, R.A. ( 0000-0002-6013-2334)
Bowron, D.T.
Hannon, A.C.
Newport, R.J.

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