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Published in:
01-07-2013
Effect of vanadium doping on the electric properties of barium titanate hafnate ceramics
Published in: Journal of Materials Science: Materials in Electronics | Issue 7/2013
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Abstract
Pure and V-doped barium titanate hafnate (BaHf0.1Ti0.9O3, short for BHT) ceramics were prepared by sol–gel method. The microstructures, dielectric and ferroelectric properties of BaHf0.1V
x
Ti0.9−x
O3 (x = 0, 0.02, 0.05, 0.08, 0.1) ceramics have been investigated. From the X-ray patterns it implies that V5+ ions have entered the unit cell maintaining the perovskite structure of solid solution. The a-axis and c-axis lattice constants gradually increase and the tetragonality gradually decreases with the increasing of vanadium content. The content of vanadium has an inconspicuous effect on the grain size and the Curie temperature. The addition of vanadium can decrease the dielectric loss of BHT ceramics. It is found that well-behaved hysteresis loops can be observed in all samples at room temperature. The coercive electric field gradually decreases and then increases with the increasing of vanadium content.