This study is focused on the prediction of coefficient of thermal expansion (CTE) of silica-sand-based fuel-cell seal materials (FcSMs) which in principle require a CTE value in the range of 9.5-12 ppm/°C. A semi-quantitative theoretical method to predict the CTE value is proposed by applying the analyzed phase compositions from XRD data and characterized density-porosity behavior. A typical silica sand was milled at 150 rpm for 1 hour followed by heating at 1000 °C for another hour. The sand and heated samples were characterized by means of XRD to perceive the phase composition correlation between them. Rietveld refinement was executed to investigate the weight fraction of the phase contained in the samples, and then converted to volume fraction for composite CTE calculations. The result was applied to predict their potential physical properties for FcSM. Porosity was taken into account in the calculation after which it was directly measured by the Archimedes method.

Original languageEnglish
Title of host publicationInternational Conference on Theoretical and Applied Physics, ICTAP 2012
Number of pages3
Publication statusPublished - 2013
Event2nd International Conference on Theoretical and Applied Physics, ICTAP 2012 - Palangkaraya, Central of Kalimantan, Indonesia
Duration: 19 Oct 201220 Oct 2012

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference2nd International Conference on Theoretical and Applied Physics, ICTAP 2012
CityPalangkaraya, Central of Kalimantan


  • Thermal expansion coefficient
  • XRD phase analysis
  • fuel-cell seal material
  • porosity
  • silica sand


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