Nanopowders of Na0.5K0.5NbO3 Prepared by the Pechini Method |
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| Authors: | Anirban Chowdhury Samantha O'Callaghan Thomas A Skidmore Craig James Steven J Milne |
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| Affiliation: | Institute for Materials Research, Houldsworth Building, University of Leeds, Leeds LS2 9JT, U.K. |
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| Abstract: | A Pechini-based chemical synthesis route was used to produce powders of Na0.5K0.5NbO3 (NKN). The thermochemistry of the gel was investigated using thermogravimetric analysis-fourier transform infrared (TGA-FTIR) evolved gas analysis; in addition, powder FTIR was used to analyze the gel residues after different heat treatments. The final decomposition of the organic components occurred at ∼650°C. However, hydrated–carbonated secondary phase(s) were detected by FTIR in powders that had been heated at 700°C, indicating that the NKN nanopowders are susceptible to a reaction with atmospheric moisture and carbon dioxide. The NKN particle sizes were in the range 50–150 nm after decomposition at 700°C. |
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