Converse piezoelectric properties of K and Na-modified (Na_1-xK_x) NbO₃ lead free ceramics for x = 0.08 and 0.17

Abstract

The effect of potassium content on the structure and piezoelectric properties of the Na_1−xK_xNbO₃ (x = 0.08 and 0.17) (SPN) ceramics has been systematically studied. The pellets preparation and characterization have been reported earlier. The piezoelectric properties of the Na_1−xK_xNbO₃ (x = 0.08 and 0.17) were observed. The P-E loops, strain%, and the polarization current were observed. The value of d₃₃* increasing with the application of Electric field, the rate of increasing value of d₃₃* for x = 0.08 was faster than compared to x = 0.17. The value of d₃₃* for x = 0.08 and x = 0.17 are 144 (pm/V), 136 (pm/V) respectively at the applied field 44 kV/cm.

Keywords:

• Ceramics
• dielectric constant
• piezoelectric
• ferroelectrics

Acknowledgments

The authors are thankful to Prof. N. S. Panwar, HNB Garhwal University, Srinagar (Garhwal), for his kind suggestion. Prof. N. S. Panwar is also thankfully acknowledged for providing laboratory facilities.