Title :
Can relaxor piezoelectric materials outperform PZT?
Author :
Yamashita, Y. ; Ichinose, N.
Author_Institution :
Mater. & Devices Res. Labs., Toshiba Corp., Kawasaki, Japan
Abstract :
This paper reviews the Pb(B\´B")O3-PbTiO3 piezoelectric material system. Among the Pb(B\´B")O3-PbTiO3 materials, Pb(Sc1/2Nb 1/2)O3-Pb(Mg1/3Nb2/3)O3 -PbTiO3 (PSN-PMN-PT) ceramic material exhibits excellent piezoelectric properties near the MPB, such as kp>70%, kt>54%, k33>77%, d33>500 pC/N, and Tc=160-260°C. The ceramic has superior piezoelectric properties as compared with conventional PZT ceramics, which so far have been thought to be the best binary piezoelectric ceramic materials. One of the big advantages of relaxor-PT systems compared with PZT is the ease with which single crystals of the MPB composition can be grown. These single crystals generally have superior properties compared with the ceramics if the appropriate axis is utilized. The advantages and disadvantages of the PSN-PMN-PT material and other Pb(B\´B")O3-PbTiO3 systems are compared with PZT
Keywords :
lead compounds; piezoceramics; piezoelectric materials; PSN-PMN-PT; PZT; PbScNbO3-PbMgNbO3-PbTiO3; PbZrO3TiO3; ceramic; morphotropic phase boundary; relaxor piezoelectric material; single crystal; Ceramics; Crystalline materials; Crystals; Dielectric constant; Dielectric materials; Ferroelectric materials; Piezoelectric materials; Polarization; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on
Conference_Location :
East Brunswick, NJ
Print_ISBN :
0-7803-3355-1
DOI :
10.1109/ISAF.1996.602713
