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Piezoelectric and dielectric properties of 0.98(Na0.5K0.5)NbO3-0.02Ba(ZrxTi(1-x))O-3 ceramics
- Authors
- Lee, Seung-Hwan; Lee, Sung-Gap; Lee, Young-Hie
- Issue Date
- Oct-2012
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Dielectric properties; Ceramics; Piezoelectricity; Ferroelectricity
- Citation
- MATERIALS RESEARCH BULLETIN, v.47, no.10, pp 2863 - 2866
- Pages
- 4
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- MATERIALS RESEARCH BULLETIN
- Volume
- 47
- Number
- 10
- Start Page
- 2863
- End Page
- 2866
- ISSN
- 0025-5408
1873-4227
- Abstract
- Lead-free 0.98(Na0.5K0.5)NbO3-0.02Ba(ZrxTi(1-x))O-3(0.98NKN-0.02BZT) ceramics with Zr contents were fabricated by a conventional mixed-oxide method. The results indicate that the Zr/Ti ratio significantly influences the structural, piezoelectric, dielectric, and ferroelectric properties of 0.98NKN-0.02BZT ceramics. For the 0.98NKN-0.02BZT (x = 0) ceramics sintered at 1090 degrees C, the bulk density increased as the Zr contents decreased and showed a maximum value at x = 0. The Curie temperature of the 0.98NKN-0.02BZT ceramics slightly decreased as the Zr contents increased. The dielectric constant, piezoelectric constant, and electromechanical coupling factor of samples were maximized at x = 0, which might be due to the increase in density. A high d(33) = 194 pC/N, k(p) = 38% were obtained for the 0.98NKN-0.02BZT ceramics sintered at 1090 degrees C for 4 h. (C) 2012 Elsevier Ltd. All rights reserved.
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