سال انتشار: ۱۳۸۷
محل انتشار: دومین کنگره بین المللی علوم و فناوری نانو
تعداد صفحات: ۲
Abdolali Alemi – Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz,Tabriz,
Sima Sedghinia – Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz
Over the past few decades, nanostructured materials have been the subject of much interest due to their remarkable physical properties from decreased size, increased surface to volume ratio, and novel morphologies. In particular, nanostructured polynary oxides attract attention due to their more extensive applications in the areas of optics, sensors, photoelectronics and catalysts. Zinc aluminate (ZnAl2O4) is extensively employed in functional ceramic materials due to its superior catalytic, thermal and optical properties. ZnAl2O4 is used as a catalyst in many catalytic reactions, such as cracking, dehydration, hydrogenation and dehydrogenation reactions.It can also be used as a catalyst support since it has good thermal stability, low acidity and hydrophobic behaviour. Furthermore, ZnAl2O4 has potential for use in ultraviolet (UV) photoelectronic devices because the optical band gap of polycrystalline ZnAl2O4 (3.8 eV) indicates that it is transparent to light with wavelengths > 320 nm.Finally, it can be used as a second phase in glaze layers of white ceramic tiles to improve wear resistance and mechanical properties and to preserve whiteness.Various methods have been developed to prepare ZnAl2O4.