| Abstract
| - Ternary and quaternary transition metal oxides, which offer a wide variety of important physicalproperties, are traditionally synthesized using high-temperature reactions that often require several daysof heating. A new nanoparticle-directed approach for the rapid low-temperature synthesis of nanocrystallinebulk-scale ternary and quaternary transition metal oxides has been developed. Readily available metaloxide nanoparticles can serve as a robust toolkit of highly reactive reagents, which can be mixed insolution in known ratios to form nanomodulated precursors and rapidly transformed, at relatively lowtemperatures, into more complex oxides. This approach is initially demonstrated for pyrochlore-typeY2Ti2O7 and Eu2Ti2O7 using XRD, DSC, and TEM to monitor the reaction. A nanocomposite of Y2O3and TiO2 nanoparticles transforms into nanocrystalline Y2Ti2O7 within 2 h of heating to 700 °C, andEu2Ti2O7 forms within 2 h of heating a nanocomposite of Eu2O3 and TiO2 nanoparticles to 800 °C.NiTiO3, CoTiO3, Bi2CuO4, and Bi5FeTi3O15 can also be synthesized.
- Readily available metal oxide nanoparticles can serve as a toolkit of highly reactive reagents that can be mixed in solution in known ratios to form nanocomposites and then thermally transformed rapidly and at low temperatures into a nanocrystalline product phase. The approach is demonstrated for Y2Ti2O7, Eu2Ti2O7, NiTiO3, CoTiO3, Bi2CuO4, and Bi5FeTi3O15.
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