A co-precipitation technique to prepare BaTa 2O 6

A mixture of ammonium oxalate and ammonium hydroxide was used to co-precipitate barium and tantalum ions as barium oxalate and tantalum hydroxide under basic conditions. On calcination at 750 °C, this precursor yielded BaTa 2O 6 (BT) ceramics. This is much lower temperature as compared to that prepa...

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Bibliographic Details
Published inCeramics international Vol. 33; no. 2; pp. 297 - 299
Main Authors Navale, S.C., Samuel, Violet, Gaikwad, A.B., Ravi, V.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2007
Subjects
B. Electron microscopy
Barium tantalate
Ceramics
Oxides
X-ray diffraction
B. Electron microscopy
X-ray diffraction
Oxides
Ceramics
Barium tantalate
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Summary:A mixture of ammonium oxalate and ammonium hydroxide was used to co-precipitate barium and tantalum ions as barium oxalate and tantalum hydroxide under basic conditions. On calcination at 750 °C, this precursor yielded BaTa 2O 6 (BT) ceramics. This is much lower temperature as compared to that prepared by traditional solid-state method (1000 °C) as reported for the formation of BaTa 2O 6. Transmission electron microscope (TEM) investigations revealed that the average particle size is 70 nm for the calcined powders. The room temperature dielectric constant at 1 kHz is found to be 100.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2005.08.012