Hafnium Oxide Sol-gel Material with Embedded Luminescent Polyol Nanoparticles
M.-A. Flores-González, M. Villanueva-Ibáñez, M.-A. Hernández-Pérez, P.-N. Olvera-Venegas, R. González-Montes de Oca
Nanotechnology, new materials and systems for the health and industry/Polytechnique University of Pachuca
Hafnium dioxide (HfO2)-based materials can be used in diverse applications; yttrium oxide stabilized hafnium oxide is widely employed in high temperature applications, anticorrosion, thermal barrier or optical coatings. Furthermore, HfO2 presents a high crystalline density (≈10) that makes it attractive for host lattice activated by rare earths for luminescent applications. In this work, Y2O3:Eu3+ nanoparticles (NPs) embedded in HfO2 were prepared by polyol and sol-gel techniques, respectively. The structure and growth behavior of nanoparticles in the sol-gel powders were studied by X-ray diffraction, dynamic light scattering, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and micro Raman spectroscopy. The experiments indicate that NPs have a polycrystalline structure with average size of 20 nm. The photoluminescent (PL) characteristics of nanostructured material were investigated.