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Controllable synthesis of metastable tetragonal zirconia nanocrystals using citric acid assisted sol–gel method
Metastable tetragonal ZrO2 nanoparticles and nanosheets were synthesized with citric acid assisted sol–gel method. In this approach, zirconium acetylacetonato, Zr(acac)2, citric acid (CA) and ethylene glycol (EG) were used as the source of Zr4+, the chelating, and solvent agent, respectively. The ef...
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Published in: | Ceramics international 2013-04, Vol.39 (3), p.2933-2941 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Metastable tetragonal ZrO2 nanoparticles and nanosheets were synthesized with citric acid assisted sol–gel method. In this approach, zirconium acetylacetonato, Zr(acac)2, citric acid (CA) and ethylene glycol (EG) were used as the source of Zr4+, the chelating, and solvent agent, respectively. The effects of heat treatment on zirconia phase evolution were investigated. We demonstrate that pure tetragonal nanocrystalline zirconia can be obtained with CA: EG mole ratio=5:1 and calcination temperature 490°C. The microstructure of the products was characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and Raman scattering. Finally, Photoluminescence (PL) of nanosheets and nanoparticles were also investigated. |
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ISSN: | 0272-8842 1873-3956 |
DOI: | 10.1016/j.ceramint.2012.09.067 |