Bomlai, P, Muensit, N and Milne, SJ (2013) Structural and electrical properties of Na0.47K 0.47Li0.06NbO3 lead-free piezoelectric ceramics modified by AgSbO3. Ceramics International, 39 (Supl.1). S135 - S138. ISSN 0272-8842
Abstract
(1-x)Na0.47K0.47Li0.06NbO3 (NKLN)-xAgSbO3 lead-free piezoelectric ceramics were prepared using a reaction sintering method. The effects of AgSbO3 doping on the structural and electrical properties of NKLN ceramics sintered at 1000-1040 °C were studied. The dopant affected densification, phase content, sintering temperature, microstructure and electrical properties. Variations in the relative intensity of X-ray diffraction peaks were consistent with Ag + and Sb5+ ions substituting on the perovskite lattice to produce a change in the proportions of co-existing tetragonal and orthorhombic phases. Grain growth during secondary re-crystallization was also affected. The temperature of the orthorhombic-tetragonal (O-T) phase transition and the Curie temperature (TC) decreased as a result of AgSbO3 modifications. The dielectric and piezoelectric properties are enhanced for the composition near the orthorhombic-tetragonal polymorphotropic phase boundary. The 0.92Na0.47K0.47Li0.06NbO 3-0.08AgSbO3 ceramics exhibited optimum electrical properties (d33=252 pC/N, εr=1450, tan δ=0.02, and TC=280 °C). These results reveal that (1-x)Na 0.47K0.47Li0.06NbO3-xAgSbO 3 ceramics are promising materials for lead-free piezoelectric application.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | A. Sintering; C. Electrical properties; D. Niobates |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Materials Research (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 19 Oct 2015 15:57 |
Last Modified: | 19 Oct 2015 15:57 |
Published Version: | http://dx.doi.org/10.1016/j.ceramint.2012.10.049 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ceramint.2012.10.049 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:84655 |