1. Synthesis and microstructure characterization of tetragonal Zr1–xTixO2 (x = 0–1) solid solutions.
- Author
-
Kong, Linggen, Karatchevtseva, Inna, Zhu, Hanliang, Qin, Meng Jun, and Aly, Zaynab
- Subjects
ELECTRON spectroscopy ,CHEMICAL stability ,DENSITY functional theory ,MICROSTRUCTURE ,SOLID solutions - Abstract
Oxide powders of Zr 1–x Ti x O 2 (x = 0–1) solid solutions with micron-sized particles were synthesized via a solution combustion method. The synthesis process and Zr/Ti molar ratio were optimized to produce powders with the tetragonal crystal structure. X-ray diffraction, Raman spectroscopy and transmission electron spectroscopy results confirm that a full crystallization microstructure with the single tetragonal phase is obtained after calcination at 600 °C while maintaining the crystallite size <30 nm. Zr/Ti oxide mixtures with Zr ≥ 67 mol% exhibit a tetragonal crystal structure and the embedding Ti in ZrO 2 improves the structure stability. The nitrogen sorption results indicate that the powders possess mesoporous morphology with medium specific surface areas (∼10–50 m
2 /g). Chemical stability tests show that these powders are relatively stable with negligible removal of titanium and zirconium after elution by 0.5 mol/L HCl. Density functional theory was used to calculate the most stable structure with low energy for the selected composition. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
- View/download PDF