Effects of CaTiO₃ on Electrical Properties in LiTaO₃ Ceramics

Abstract

As a part of sequential work developing new lead-free piezoelectric ceramics, the solid solution system (1-x)LiTaO₃–xCaTiO₃, 0 ≤ x ≤ 0.20, has been investigated. Samples sintered at 1250°C for 5 h in air have resulted in dense and white ceramics with single phase lithium niobate structure. The Curie temperature of LiTaO₃ was lowered with increasing CaTiO₃ content, accompanying with a feature of diffused phase transition. The ceramics showed clear vibration resonance in radial and thickness modes.

Keywords:

• Solid solution
• lithium tantalate ceramic
• Curie temperature
• piezoelectric ceramic

Acknowledgments

This work was supported by Grant-in-Aid for Scientific Research (C) (2) under Contract No. 2650306 from the Japanese Ministry of Education, Science, Sport and Culture and by Hayashi Memorial Foundation for Female Natural Scientists.