Properties of t-zirconia prepared by a composite-assisted nonhydrolytic sol-gel

Christine Warwar Damouny, Christine Khoury, Oz M. Gazit

Research output: Contribution to journalArticlepeer-review


High surface area and highly crystalline tetragonal Ni-Si-doped ZrO2 samples were prepared using a nonhydrolytic sol-gel method. The synthesis involved the condensation of zirconium chloride and isopropyl ether in the presence of a chitosan-based composites containing Ni and Si (Ni@Si-CS), followed by calcination to remove the CS. The interactions between the zirconium precursor and the Ni@Si-CS composites were studied and correlated with the effect on morphologies, crystalline structure, phase compositions, and surface area. These parameters were evaluated for different Ni@Si-CS to ZrO2 mass ratios. It was found that increasing the concentration of Ni@Si-CS composite led to smaller grains of ZrO2 nanocrystals and an overall material with a higher surface area. The stability of the tetragonal/cubic phases following calcination at 800°C was correlated with the presence of low amounts of Ni2+ in the sublattice of ZrO2 and the presence of the Si-chitosan, which acted as steric stabilizer.

Original languageEnglish
Pages (from-to)456-464
Number of pages9
JournalJournal of the American Ceramic Society
Issue number1
StatePublished - Jan 2019


  • composites
  • crystals/crystallization
  • sol-gel
  • zirconia

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


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