A coprecipitation technique to prepare BaNb 2O 6

A mixture of ammonium oxalate and ammonium hydroxide was used to coprecipitate barium and niobium ions as barium oxalate and niobium hydroxide under basic conditions. This precursor on calcination at 750 °C yielded BaNb 2O 6 ceramics. This is a much lower temperature as compared to that prepared by...

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Published inMaterials science & engineering. B, Solid-state materials for advanced technology Vol. 117; no. 2; pp. 169 - 171
Main Authors Natarajan, N., Samuel, Violet, Pasricha, Renu, Ravi, V.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2005
Subjects
Ammonia
Ceramics
Electron microscopy
Niobium oxide
Oxides
Ammonia
Niobium oxide
Oxides
Ceramics
Electron microscopy
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Summary:A mixture of ammonium oxalate and ammonium hydroxide was used to coprecipitate barium and niobium ions as barium oxalate and niobium hydroxide under basic conditions. This precursor on calcination at 750 °C yielded BaNb 2O 6 ceramics. This is a much lower temperature as compared to that prepared by traditional solid-state method (1000 °C), as reported for the formation of BaNb 2O 6. Transmission electron microscope (TEM) investigations revealed that the average particle size is 100 nm for the calcined powders. The room temperature dielectric constant at 1 kHz is found to be 1100. The ferroelectric hysteresis loop parameters of these samples were also studied.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2004.11.009