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Structural Investigations on Yttria – Doped Zirconia Nanopowders Obtained by Sol-Gel Method

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: B.S. Vasile, Cristina Ghitulica, Nicoleta Popescu-Pogrion, S. Constantinescu , Ionel Mercinoiu, Raluca Stan, Ecaterina Andronescu

Editorial: Journal of Optoelectronic and Advanced Materials , 9 (12), p.3774-3780, 2007.

Rezumat:

The attractive properties of zirconia, particularly fracture toughness, wear resistance and chemical stability, have led to vast research efforts designed to investigate, characterize and develop such materials. Applications vary from structural,
mechanical, biomedical to electrical, especially the fuel cells field. The current study is aiming at preparation and structural characterization of 10% Y2O3 stabilized ZrO2 nanometric powders. The sol-gel method is known to be easy to use for producing various kinds of materials, structured at nanometric level, so was chosen for the elaboration of powders. Different
thermal treatments were applied to the obtained materials, which were consequently investigated through thermal analysis,X-ray diffraction (XRD) scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The characteristics of Y2O3 doped zirconia powders are influenced by the processing parameters and proved promising for further applications in, for example, the Solid Oxides Fuel Cell field.

Cuvinte cheie: ZrO2,pulberi nano,metoda sol-gel ,DRX, MET // ZrO2,nanopowder,sol-gel method,XRD,TEM