Dielectric and piezoelectric properties of lanthanum-modified lead magnesium niobium-lead titanate ceramics
- 1 May 1989
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 93 (1) , 341-349
- https://doi.org/10.1080/00150198908017366
Abstract
Dielectric and piezoelectric properties of relaxor ferroelectrics in the solid solution, formulated (1−x)(Pb1–1.5yLay)(Mg1/3Nb2/3)—x PbTiO3, have been investigated. The dielectric properties show typical first order ferroelectric behavior for PT ≥ 35% and relaxor type below being indicative of the morphotropic phase boundary. Lanthanum doping resulted in reduction of grain size and shifting of the Tc (Curie Temperature) −25 °C/mole% downward in PMN-PT polycrystalline ceramics. The optimum value of piezoelectric constant, d 33, obtained was 560 pC/N for compositions near the morphotropic phase boundary. Based on this investigation, La doped PMN-PT compositions appear to be promising candidates, for fine grain size piezoelectrics, pyroelectric bolometers, and through hot pressing or hot isostatic pressing, for electro-optic applications.Keywords
This publication has 12 references indexed in Scilit:
- Fabrication of perovskite lead magnesium niobatePublished by Elsevier ,2003
- Grain size dependence of dielectric and electrostriction of Pb(Mg1/3Nb2/3)O3-based ceramicsFerroelectrics, 1987
- Ferroelectric materials for thermal IR detectorsFerroelectrics, 1987
- Dielectric Properties of Lead‐Magnesium Niobate CeramicsJournal of the American Ceramic Society, 1984
- Internal electrode piezoelectric ceramic actuatorFerroelectrics, 1983
- Dielectric and Piezoelectric Properties of 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3 Single CrystalsJapanese Journal of Applied Physics, 1982
- Electrostrictive effect in lead magnesium niobate single crystalsJournal of Applied Physics, 1980
- Electrostrictive behavior of lead magnesium niobate based ceramic dielectricsFerroelectrics, 1980
- Large electrostrictive effects in relaxor ferroelectricsFerroelectrics, 1980
- DIELECTRIC AND ELECTRO-OPTIC PROPERTIES OF LEAD MAGNESIUM NIOBATEApplied Physics Letters, 1967