Synthesis and characterization of ceria–yttria co-stabilized zirconia (CYSZ) nanoparticles by sol–gel process for thermal barrier coatings (TBCs) applications
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Nanocrystalline ceria–yttria co stabilized zirconia (CYSZ) powder was successfully synthesized by the Pechini complex route. The obtained powder was tetragonal ZrO2. Fourier transform infrared spectroscopy was employed to evaluate the bonding characteristics of the obtained gel. Thermo gravimetric analysis together with differential scanning calorimetry was used to investigate the variations of dried gel properties with temperature and to identify the appropriate heating process. The effect of heat treatment procedure on the purity and crystallographic structure of the final product was studied by the use of X-ray diffraction. Furthermore, Raman spectra were recorded at room temperature to find out about possible Raman modes and to understand the structure of CYSZ nanoparticles. The changes in morphology and the size distribution were studied by field emission scanning electron microscopy and transmission electron microscopy. The CYSZ powder contained primary particles of 25 nm size with a uniform distribution. Thermal conductivity of nanostructured CYSZ measured by laser flash technique, found to be lower than conventional counterpart.
KeywordsNanocrystalline CYSZ Pechini method Characterization Sol–gel
We gratefully acknowledge support of this research by the Malek Ashtar University of Technology (MUT).
- 24.Sakka S (2005) Handbook of sol–gel science and technology. 1. Sol–gel processing. Springer, BerlinGoogle Scholar
- 36.A Handbook (1979) Metals handbook, powder metallurgy, vol 9Google Scholar
- 39.Soyez G, Eastman JA, Thompson LJ, Bai G-R, Baldo PM, McCormick AW, DiMelfi RJ, Elmustafa AA, Tambwe MF, Stone DS (2000) Grain-size-dependent thermal conductivity of nanocrystalline yttria-stabilized zirconia films grown by metal-organic chemical vapor deposition. Appl Phys Lett 77(8):1155–1157CrossRefGoogle Scholar
- 40.Hajizadeh-Oghaz M, Razavi RS, Khajelakzay M (2015) Optimizing sol–gel synthesis of magnesia-stabilized zirconia (MSZ) nanoparticles using Taguchi robust design for thermal barrier coatings (TBCs) applications. J Sol-Gel Sci Technol 73:227–241Google Scholar