Abstract
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 language | English |
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Pages (from-to) | 456-464 |
Number of pages | 9 |
Journal | Journal of the American Ceramic Society |
Volume | 102 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2019 |
Keywords
- composites
- crystals/crystallization
- sol-gel
- zirconia
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry