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Barium Titanate Nanopowders Prepared from the Modified Oxalate Co-Precipitation Method

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Abstract:

Barium titanate nanopowders were prepared from the modified oxalate co-precipitation method. Barium chloride dihydrate and potassium titanyl oxalate dihydrate were used as the starting precursors with the mole ratio of Ba:Ti as 1:1. Barium titanyl oxalate complex powders were obtained after adjusting the final of pH of the solution to 1. The precipitates were filtered, washed and dried at 100 oC for 5h. The precipitate powders were calcined at 400-700 oC for 2h. The phase transition was studied by X-ray diffractometry (XRD). Cubic structure of barium titanate was obtained after calcinations at 700 oC for 2h. The morphology and chemical composition were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDXS). The range of particle size was 50-100 nm with irregular in shape. The elemental composition of barium, titanium and oxygen showed the characteristic X-ray energy values.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

515-518

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.515

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Online since:

October 2007

Authors:

Pusit Pookmanee, Chanitpa Khantha, Sukon Phanichphant

Keywords:

Barium Titanate (BT), Energy Dispersive X-Ray (EDX), Modified Oxalate, Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD)

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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