D. Viehland—contributing editor
Dielectric and Piezoelectric Properties of the Morphotropic Phase Boundary Composition in the (0.8−x) Pb(Mg1/3Ta2/3)O3−0.2PbZrO3−xPbTiO3 Ternary System
Article first published online: 16 MAY 2008
© 2008 The American Ceramic Society
Journal of the American Ceramic Society
Volume 91, Issue 7, pages 2232–2235, July 2008
How to Cite
Hao, H., Zhang, S. and Shrout, T. R. (2008), Dielectric and Piezoelectric Properties of the Morphotropic Phase Boundary Composition in the (0.8−x) Pb(Mg1/3Ta2/3)O3−0.2PbZrO3−xPbTiO3 Ternary System. Journal of the American Ceramic Society, 91: 2232–2235. doi: 10.1111/j.1551-2916.2008.02465.x
This work was financially supported by NIH under grant # P41-RR11795 and ONR.
- Issue published online: 8 JUL 2008
- Article first published online: 16 MAY 2008
- Manuscript No. 24178. Received January 3, 2008; approved March 20, 2008.
Morphotropic phase boundary (MPB) compositions separating rhombohedral and tetragonal phases in the (1−x−y)Pb(Mg1/3Ta2/3)O3–yPbZrO3–xPbTiO3 (PMT–PZ–PT100x) ternary solid solution system were characterized using X-ray diffraction and dielectric, piezoelectric properties. This work focused on compositions with a PZ content fixed at y=0.2, with an MPB composition found to be located at x=0.4. Piezoelectric coefficients and dielectric permittivity were found to be on the order of d33=580 pC/N and 4100, respectively. Acceptor modification using manganese was found to induce a “hardening” effect in 0.4PMT–0.2PZ–0.4PT, with decreased piezoelectric coefficients d33 and dielectric loss and increased mechanical quality factor Q. Piezoelectric coefficients d33, Q values, and dielectric loss were found to be 500 pC/N, 2000, and 0.4%, respectively, for 0.4PMT–0.2PZ–0.4PT with MnO2 dopant levels around 0.5 wt%. The figure of merit (product of Q and d33) was found to be on the order of 1 × 106, significantly higher when compared with other hard piezoelectric PZT materials. Specifically, the PMT–PZ–PT materials may be attractive candidates for high-power ultrasonic applications, particularly fine-scale components that require relating high permittivities.