Piezoelectric properties of lead-free (1-x)(Na0.5K0.5)NbO3- xLi(Sb0.17Ta0.83)O3 ceramics
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The (1-x)(Na0.44K0.52)Nb0.84O3-xLi0.04(Sb0.06Ta0.1)O3 (0.01 ≤ x ≤ 0.05) lead free ceramics were prepared using a conventional mixed oxide method. Adding various contents of Li(Sb,Ta)O3 to (Na,K)NbO3 makes it easy to conduct the sintering processes of pure (Na,K)NbO3 which is difficult to sinter. It was found that the piezoelectric properties of (1-x)NKN-xLST(x = 0.02)ceramic sintered at 1080 oC for 2 h has a piezoelectric constant and a planar electromechanical coupling coefficient of 159 pC/N and 38% respectively. It is found that the addition of LST can improve poling procedures of the ceramics because of substitution. These solid solution ceramics look attractive candidates for lead-free piezoelectric applications.
Abstract
The (1-x)(Na0.44K0.52)Nb0.84O3-xLi0.04(Sb0.06Ta0.1)O3 (0.01 ≤ x ≤ 0.05) lead free ceramics were prepared using a conventional mixed oxide method. Adding various contents of Li(Sb,Ta)O3 to (Na,K)NbO3 makes it easy to conduct the sintering processes of pure (Na,K)NbO3 which is difficult to sinter. It was found that the piezoelectric properties of (1-x)NKN-xLST(x = 0.02)ceramic sintered at 1080 oC for 2 h has a piezoelectric constant and a planar electromechanical coupling coefficient of 159 pC/N and 38% respectively. It is found that the addition of LST can improve poling procedures of the ceramics because of substitution. These solid solution ceramics look attractive candidates for lead-free piezoelectric applications.
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