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Effect of B2O3 flux on the crystal structure, dielectric properties of (K0. 5Na0. 5)NbO3 single crystal grown by flux method
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2012 (English)In: Recent Trends In Advanced Materials, Trans Tech Publications Inc., 2012, Vol. 584, 150-154 p.Conference paper (Refereed)
Abstract [en]

Lead free piezoelectric single crystals of sodium potassium niobate (K0.5Na0.5)NbO3 single crystals were grown by high-temperature solution method using B2O3 flux. The KNN crystals grown by without B2O3 flux and with B2O3 flux are referred to as samples A and B respectively. It was found that additions of small amounts of boron oxide B2O3 further lower the melting temperature of the eutectic mixture and exhibits excellent dielectric properties. Phase analysis showed that all samples crystallized in pure orthorhombic perovskite phase. AFM morphological studies show that the root mean square (rms) roughness values were measured to be, 5.3nm and 6.96nm for the sample A and sample B crystal respectively. A slight decrease in the orthorhombic to tetragonal phase transition temperature T(O-T) and Curie temperature T-C has been observed in sample B when compared with sample A.

Place, publisher, year, edition, pages
Trans Tech Publications Inc., 2012. Vol. 584, 150-154 p.
, Advanced Materials Research, ISSN 1022-6680 ; 584
Keyword [en]
Dielectric properties, Domain pattern, Flux method, Single crystal
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-108008DOI: 10.4028/ 000317550700032ScopusID: 2-s2.0-84869430274ISBN: 978-303785521-8OAI: diva2:580267
International Conference on Recent Trends in Advanced Materials, ICRAM 2012; Vellore, TN; India; 20 February 2012 through 22 February 2012

QC 20121221

Available from: 2012-12-21 Created: 2012-12-19 Last updated: 2014-08-25Bibliographically approved

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