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Dhage, S. R.
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article
Preparation of ferroelectric BaNb2O6 by the urea method
Abstract
<p>A precipitate was formed when an aqueous solution of BaCl<sub>2</sub>, NbF<sub>5</sub> and urea in required ratio (the ratio of total metal cations to the urea is five) is heated on a water bath at 100 °C. This precipitate on decomposition at 600 °C yielded the nanocrystallites of BaNb <sub>2</sub>O<sub>6</sub> (BN), as confirmed by X-ray diffraction study (XRD). 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 <sub>2</sub>O<sub>6</sub>. Transmission electron microscope (TEM) investigations revealed that the average particle size is 85 nm for the calcined powders. The room temperature dielectric constant at 1 kHz is found to be 900. The ferroelectric hysteresis loop parameters of these samples were also studied.</p>