Title :
A comparison of the properties of (1-x)PMN-xPT ceramics near the morphotropic phase boundary prepared by sol-gel and columbite precursor methods
Author :
Kelly, Joseph ; Farrey, Greg ; Safari, Ahmad
Author_Institution :
Dept. of Ceramic Sci. & Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
Ceramic lead magnesium niobate-lead titanate ((1-x)PMN-xPT) of different compositions was prepared using sol-gel and columbite precursor methods. This study covers compositions ranging from 0.72PMN-0.28PT to 0.50PMN-0.50PT, focusing on (1-x)PMN-xPT compositions that exhibit piezoelectric behavior. X-ray diffraction is used to show that the (1-x)PMN-xPT system has a compositionally wide two-phase region and that 0.655PMN-0.345PT is the morphotropic phase boundary (MPB) composition. Microstructures of ceramics prepared by the two different methods are presented. Electromechanical property evaluation shows that the optimal piezoelectric properties (d33=720 pC/N, K=5400, k p=62%, and kt=46%) are obtained at the MPB composition
Keywords :
X-ray diffraction; ferroelectric materials; lead compounds; piezoceramics; sol-gel processing; PMN-PT ceramic; PMN-PbTiO3; PbMgO3NbO3-PbTiO3; X-ray diffraction; columbite precursor; composition; electromechanical properties; microstructure; morphotropic phase boundary; piezoelectric properties; sol-gel precursor; Ceramics; Electrostriction; Ferroelectric materials; Magnesium; Microstructure; Niobium compounds; Powders; Temperature sensors; Titanium compounds; X-ray diffraction;
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.1996.598120
