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Updated: Jun 26, 2026
High Temperature Fabrication of Nanostructured Yttria-Stabilized-Zirconia (YSZ) Scaffolds by In Situ Carbon Templating Xerogels
Published on: April 16, 2017
Structural and chemical characterization of Yb2O3-ZrO2 system by HAADF-STEM and HRTEM
C Angeles-Chavez1, P Salas, L A Díaz-Torres
1Instituto Mexicano del Petroleo, Programa de Ingeniería Molecular, Eje Central Lazaro Cardenas 152, A. P. 14-805, 07730 México, D. F. Mexico. cangeles@imp.mx
Abstract:
ZrO2:Yb3+ nanocrystalline phosphors with high concentrations of ytterbium ions were prepared using the sol-gel method. X-ray diffraction, high-angle annular-dark-field scanning transmission electron microscopy (HAADF-STEM), energy dispersive X-ray spectroscopy, and high-resolution transmission electron microscopy (HRTEM) were used to characterize the nanocrystalline phosphors annealed at 1000 degrees C. Unit-cell distortion and changes in the crystalline structure of the monoclinic zirconia to tetragonal zirconia, and subsequently cubic zirconia, were observed with increased Yb concentration. Yb ions were randomly distributed into the lattice of the crystalline structure. No segregation of Yb2O3 phase was observed. The substitution of Zr atoms by Yb atoms on different crystalline phases was confirmed by the experimental results and theoretical simulations of HRTEM and HAADF-STEM.
