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Samuel, Violet
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article
A low temperature route to prepare BaNb2O6
Abstract
<p>A combination of digestion and further low temperature calcination to crystallize the product is employed to prepare BaNb<sub>2</sub>O<sub>6</sub> ceramics. Freshly prepared niobium hydroxide gel is mixed with barium hydroxide thoroughly and allowed to react at 100°C under refluxing and stirring conditions for 6-12 h. The X-ray amorphous product so formed is heated at 500°C to form crystalline BaNb<sub>2</sub>O<sub>6</sub>. This is the lowest temperature so far 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 50 nm for the calcined powders. The room temperature dielectric constant at 1 kHz is found to be 600. The ferroelectric hysteresis loop parameters of these samples were also studied.</p>