Characterization of a barium–calcium–aluminosilicate glass/fiber glass composite seal for intermediate temperature solid oxide fuel cells

Peyman Safarzadeh Kermani, Mojtaba Ghatee*, John Thomas Sirr Irvine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The properties of BaO–CaO–Al2O3–SiO2 (BCAS) glass seal materials reinforced with 5–30 wt.% glass fiber are investigated. The seals are prepared by solid mixing process. The microstructure and phase content of the samples are studied. Mechanical properties are investigated by Vickers micro-hardness, nano-indentation and compression tests. The thermal properties of the samples are evaluated by conducting a dilatometry analysis. The electrical conductivity and leak resistance of the seal materials are measured at high temperatures. Increasing the amount of glass fiber in the composite samples decreases the magnitude of the thermal expansion coefficient. It is found the addition of just 5 wt.% of glass fiber (GF5sample) increases the indentation fracture toughness of the seals by ∼280% without impairing other properties. It is also found that the GF5 sample has high electrical resistivity with the activation energy of 63.7 kJ/mol and very low leak rate of 1.7 × 10−4 sccm/cm at 750 °C.
Original languageEnglish
Pages (from-to)304-314
Number of pages11
JournalBoletín de la Sociedad Española de Cerámica y Vidrio
Volume62
Issue number4
Early online date28 Jul 2023
DOIs
Publication statusPublished - 1 Aug 2023

Keywords

  • Composite seal
  • Glass fiber
  • Solid oxide fuel cells
  • Mechanical properties
  • Electrical properties
  • Sello compuesto
  • Fibra de vidrio
  • Pilas de combustible de óxido sólido
  • Propiedades mecánicas
  • Propiedades eléctricas

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