ONE-STEP SYNTHESIS OF NANOCRYSTALLINE OXIDES WITH UNUSUAL PHYSICAL PROPERTIES. MULLITE-TYPE SOLID SOLUTIONS SYNTHESIZED VIA MECHANOCHEMICAL/THERMAL TREATMENT
- 1 Institute of Geotechnics, Slovak Academy of Sciences, Kosice, Slovakia
- 2 State University of Maringá, Maringá, Brazil
- 3 Institute of Catalysis, Bulgarian Academy of Science, Sofia, Bulgaria
Abstract
The one-step synthesis using high energy ball milling can be used in preparation of many complex/doped oxides. In this work we report, as an example, on synthesis and characterization of mullite-type solid solutions. Mullite type Bi2(FexGa1-x)4O9 solid solutions with 0.1 ≤ x ≤ 1.0, were synthesized by combination of mechanochemical and thermal treatments of the Bi2O3/α-Fe2O3/Ga2O3 stoichiometric mixture. The microstructure of the as-prepared materials on the long-range and local atomic scales was investigated by X-ray diffraction and 57Fe Mössbauer spectroscopy, respectively.