Nanopowders of Na0.5K0.5NbO3 Prepared by the Pechini Method

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 afte...

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Published inJournal of the American Ceramic Society Vol. 92; no. 3; pp. 758 - 761
Main Authors Chowdhury, Anirban, O'Callaghan, Samantha, Skidmore, Thomas A., James, Craig, Milne, Steven J.
Format Journal Article
LanguageEnglish
Published Malden, USA Blackwell Publishing Inc 01.03.2009
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Summary: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.
Bibliography:istex:A3558CB565C0DCB597A56975F976F12D6A7E1E33
ark:/67375/WNG-ZDW4MDKH-2
ArticleID:JACE02950
‡
J. Nino—contributing editor
Present address: Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, U.K.
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2009.02950.x