Shantha, Kundapura and Varma, Kalidindi BR (2000) Characterization of Fine-Grained Bismuth Vanadate Ceramics Obtained Using Nanosized Powders. In: Journal of the American Ceramic Society, 83 (5). pp. 1122-1128.Full text not available from this repository. (Request a copy)
Nanocrystalline bismuth vanadate (n-BiV) powders with a crystallite size of <50 mm have been prepared, at room temperature, by subjecting a stoichiometric mixture of bismuth oxide and vanadium pentoxide to mechanical activation. The n-BiV powders show enhanced sinterability, in comparison to the conventionally prepared micrometer-sized bismuth vanadate (m-BiV) powders and yield ceramics with a uniform microstructure. High-density (~98% of the theoretical value), fine-grained (average grain size of ~2 $\mu$m) ceramics, obtained using n-BiV have a high dielectric constant and a high pyroelectric coefficient and are associated with low dielectric loss, both at room temperature and at the transition temperature. These fine-grained ceramics show diffused phase transition and relaxor behavior, which are attributed to the irregular distribution of defects and/or compositional inhomogeneities in these ceramics. The fine-grained ceramics exhibit ferroelectric hysteresis loops with higher remanent polarization and lower coercive field values than the coarse-grained ceramics.
|Item Type:||Journal Article|
|Additional Information:||At present DOI is not working. Copyright of this artical belongs to Blackwell.|
|Department/Centre:||Division of Chemical Sciences > Materials Research Centre|
|Date Deposited:||26 Jun 2006|
|Last Modified:||27 Aug 2008 12:12|
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