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SIIA Público
SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: Nanotechnology 2010: Advanced Materials, Cnts, Particles, Films And Composites - Technical Proceedings Of The 2010 Nsti Nanotechnology Conference And Expo, Nsti-Nanotech 2010 Título del capítulo: Synthesis of nanocrystalline (Zn1-xCox)Al 2O4 solid solution: Structural and optical properties
New inorganic pink pigments based on nanocrystalline (Zn 1-xCox)Al2O4 solid solution, were prepared using the hydrothermal method, obtaining nanoparticles below 8 nm. The spinel ZnAl2O4 was chosen as host hue to introduce Co(II) ions, because zinc aluminate is colorless and presents great thermal stability. The most straightforward way to obtain blue colors in bulk ceramics is by means of cobalt, Co(II) ions exhibit, when tenedrally coordinated, highly saturated blue shades, nevertheless these nanoparticles show a brilliant pink color due to partial substitution of Al(III) ions in octahedral sites. The samples characterization was performed by X-ray diffraction and diffuse reflectance spectroscopy. The morphology of the nanoparticles was studied by high-resolution transmission electron microscopy. The effects of Co(II) concentration and heating temperature on the spinel structure and the optical properties of the solid solution were systematically studied.
