Electrostrictive behavior of lead magnesium niobate based ceramic dielectrics

1 January 1980

journal article
research article
Published by Taylor & Francis in Ferroelectrics

Vol. 27 (1) , 31-34
https://doi.org/10.1080/00150198008226059

Abstract

The electrostrictive strains induced by high electric fields have been measured for compositions in the solid solution system Pb(Mg_1/3Nb_2/3)O₃: PbTiO₃ (PMN:PT) containing up to 20 mole% PT. Large anhysteretic quadratic strains (up to 1,000 × 10₋₆) can be induced at room temperature with no evidence of remanence. In pure Pb (Mg_1/3Nb_2/3) O₃ the electrostriction constants Q ₁₁ and Q ₁₂ are significantly smaller than in normal perovskites and the large induced strains may be traced to the high polarizability of the relaxor. With the addition of PT, the Q constants increase and the relaxation range shortens, with compositions close to 10 mole% PT providing maximum quadratic sensitivity. Over the relaxation range of temperatures, the thermal expansion is extremely small and comparable to the best thermally stable glasses and ceramics.

Keywords

This publication has 1 reference indexed in Scilit:

Electrostriction in Pb (Zn13Nb23)O3
Materials Research Bulletin, 1979