Effects of Vacancies on the Dielectric and Piezoelectric Properties of (Na_0.5K_0.5)NbO₃-SrTiO₃ Solid Solution

Vacancies have been introduced to the perovskite A- and B-site to study their effects on the dielectric and the piezoelectric properties of the (Na _0.5 K _0.5 )NbO ₃ -SrTiO ₃ solid solution. It is found that, rather different from in the case of PZT ceramics, both A- and B-site vacancies do not soften piezoelectric properties of (Na _0.5 K _0.5 )NbO ₃ -SrTiO ₃ solid solution.

Keywords:

• Lead-free
• piezoelectricity
• vacancy effects
• niobates
• ceramics

Acknowledgments

The financial support from the Japan Society for the Promotion of Science (No. 16560621) and the Collaborative Research Project of Materials and Structures Laboratory, Tokyo Institute of Technology, is acknowledged.