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Processing - structure – dielectric and piezoelectric properties correlation in PbO- based ceramics

E. DIMITRIU1,2,* , F. CRACIUN3, G. PRODAN2, V. CIUPINA2

Affiliation

  1. REGO COM SRL, Calea 13 Septembrie 115, Bucharest, sector 5, Romania
  2. Interdisciplinary Research Institute for Micro and Nanostructure, University Ovidius”, Bd. Mamaia 124, Constanta, Romania
  3. Istituto dei Sistemi Complessi, Area di Ricerca Tor Vergata, Via del Fosso del Cavaliere 100, I-00133, Rome, Italy

Abstract

Effects of trace impurities and additives on physical properties of piezoelectric ceramics are discussed. Experimental results are presented in the case of ceramics with the composition (Pb,Ca)TiO3 - Pb(Co,W)O3, doped with lithium and manganese ions. The nanostructure of the materials has been evidenced by HRTEM technique. Dielectric and piezoelectric properties have been measured on samples poled under an electric field of 5.5 – 7.5 kV/mm. Electromechanical coupling factors kt up to about 0.7 have been obtained. The dependence on temperature of dielectric, piezoelectric and electromechanical properties was recorded. The presence of anisotropy in the (Pb,Ca)TiO3 - Pb(Co,W)O3 -type materials was evidenced..

Keywords

Doped lead titanate, Perovskite, Anisotropy.

Submitted at: Sept. 1, 2008
Accepted at: Nov. 11, 2008

Citation

E. DIMITRIU, F. CRACIUN, G. PRODAN, V. CIUPINA, Processing - structure – dielectric and piezoelectric properties correlation in PbO- based ceramics, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 11, pp. 2947-2953 (2008)