Paper Title:
Piezoelectric and Electrical Properties of Lead-Free (Na0.5K0.5)NbO3- Bi0.5(Na0.80K0.20)0.5TiO3 Ceramics
  Abstract

Extending the investigations on (Na0.5K0.5)NbO3-based solid solution for lead-free piezoelectric ceramics, this paper consider the complex solid-solution system (Na0.5K0.5)NbO3–Bi0.5(Na0.80K0.20)0.5TiO3 [NKN-BNKT]. (Na0.5K0.5)NbO3 with 2 ~ 6 mol% Bi0.5(Na0.80K0.20)0.5TiO3 has been prepared following the conventional mixed oxide process. A morphotropic phase boundary (MPB) between orthorhombic (O) and tetragonal (T) was found at the composition 0.97NKN-0.03BNKT with correspondingly enhanced dielectric and piezoelectric properties. The electromechanical coupling factor and dielectric constant are higher for compositions near the MPB. The dielectric constant (εr), planar coupling coefficient (kp) and thickness coupling coefficient (kt)of 0.97NKN-0.03BNKT ceramics were 1483, 32% and 31%, respectively.

  Info
Periodical
Advanced Materials Research (Volumes 230-232)
Edited by
Ran Chen and Wenli Yao
Pages
12-15
DOI
10.4028/www.scientific.net/AMR.230-232.12
Citation
C. H. Wang, "Piezoelectric and Electrical Properties of Lead-Free (Na0.5K0.5)NbO3- Bi0.5(Na0.80K0.20)0.5TiO3 Ceramics", Advanced Materials Research, Vols. 230-232, pp. 12-15, 2011
Online since
May 2011
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