Production of nepheline/quartz ceramics from geopolymer mortars

C. Kuenzel, L. M. Grover, L. Vandeperre, A. R. Boccaccini, C. R. Cheeseman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)


This research has investigated the mechanical properties and microstructure of metakaolin derived geopolymer mortars containing 50% by weight of silica sand, after exposure to temperatures up to 1200°C. The compressive strength, porosity and microstructure of the geopolymer mortar samples were not significantly affected by temperatures up to 800°C. Nepheline (NaAlSiO 4) and carnegieite (NaAlSiO 4) form at 900°C in the geopolymer phase and after exposure to 1000°C the mortar samples were transformed into polycrystalline nepheline/quartz ceramics with relatively high compressive strength (∼275MPa) and high Vickers hardness (∼350 HV). Between 1000 and 1200°C the samples soften with gas evolution causing the formation of closed porosity that reduced sample density and limited the mechanical properties.

Original languageEnglish
Pages (from-to)251-258
Number of pages8
JournalJournal of the European Ceramic Society
Issue number2
Publication statusPublished - 1 Feb 2013


  • A. Sintering
  • C. Mechanical properties
  • Ceramic
  • Final microstructure
  • Geopolymer

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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