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, Iran
Roghayeh Ebrahimi-Kalan – Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz
Pyrochlore-type oxides are adopted by many binary metal elements having the general formula A2B2O7 where A is a 2+ or 3+ ion and B is a 5+ or 4+ ion and crystallize in the cubic space group Fd3m. The pyrochlore phase is stable up to rA: rB =1.8 and beyond this value the fluorite structure becomes more favorable . The exact formula for this oxide isOOBA′۶۲۲, has eight molecules in the unit cell . Pyrochlore oxides can display a remarkable variety of properties. They are interest for numerous applications including high efficiency catalysis , conduction of electricity, photoluminescence , resistance to radiation damage , and gas sensor . In this study we have established a simple hydrothermal technique to prepare of a series of 722OSnBiSmxx−)۰٫۲,۰٫۱,۰(=x pyrochlore nanocrystals by a low temperature hydrothermal method.