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Nanopowders of Na 0.5 K 0.5 NbO 3 Prepared by the Pechini Method
Author(s) -
Chowdhury Anirban,
O'Callaghan Samantha,
Skidmore Thomas A.,
James Craig,
Milne Steven J.
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.02950.x
Subject(s) - thermogravimetric analysis , fourier transform infrared spectroscopy , decomposition , particle size , materials science , thermal decomposition , natural bond orbital , thermochemistry , analytical chemistry (journal) , mineralogy , nuclear chemistry , chemistry , chemical engineering , inorganic chemistry , organic chemistry , molecule , engineering
A Pechini‐based chemical synthesis route was used to produce powders of Na 0.5 K 0.5 NbO 3 (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.