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- Title
Sol-gel synthesis of 2D and 3D nanostructured YSZ:Yb ceramics.
- Authors
Krivoruchko, O.; Larina, T.; Ishchenko, A.; Pestryakov, E.; Merzliakov, M.
- Abstract
This paper presents results of a detailed study of fundamental aspects of the formation of 2D and 3D nanostructured YSZ:Yb ceramics with a cubic structure through a key synthesis step in aqueous solutions of zirconium-containing hydroxy nanoparticles (1-2 nm) modified by Y and Yb ions, with the use of a sol-gel method and subsequent calcination of the resultant xerogels at temperatures above 350°C. As starting chemicals for the synthesis of ceramic powders, we used zirconyl, yttrium, and ytterbium nitrates and chlorides and aqueous ammonia. Using mixed solutions of these salts and a procedure developed by us, we synthesized sols, gels, and xerogels. To examine the effect of temperature on solid-state transformations, the xerogels were calcined according to a predetermined program in a muffle furnace at temperatures in the range from 350 to 1350°C (rarely, up to 1650°C). We focused primarily on ceramic powders close in composition to 0.86ZrO · 0.10YO · 0.04YbO. The ceramics were characterized by high-resolution transmission electron microscopy, electron microdiffraction, electronic diffuse reflectance spectroscopy, energy dispersive X-ray microanalysis, and X-ray fluorescence analysis.
- Subjects
SOL-gel processes; CERAMIC powders synthesis; CALCINATION (Heat treatment); TRANSMISSION electron microscopy; ENERGY dispersive X-ray spectroscopy; X-ray fluorescence
- Publication
Inorganic Materials, 2017, Vol 53, Issue 5, p540
- ISSN
0020-1685
- Publication type
Article
- DOI
10.1134/S0020168517050144