Dielectric and electromechanical properties of chemically modified PMN-PT-BT ceramics

Yong S. Cho, Steven M. Pilgrim, Herbert Giesche, Keith Bridger

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A particulate coating process incorporating small amounts of several additives such as titanium, zinc, barium, strontium and iron was used to modify the composition and resultant dielectric and electromechanical properties of a commercially available 0.96(0.91Pb(Mg1/3Nb2/3)O3·0.09PbTiO3)·0.04BaTiO3 . This method led to intimate mixing of the additives at the nanoscale without an additional ball-mixing process. Low- and high-field characteristics including dielectric properties, induced strain and polarization, and associated hystereses were evaluated for the samples sintered at 1200 °C for 4 h. All properties were found to depend on the chemical additives and temperature. Specifically, the addition of small quantities of titanium and barium tended to increase strain and Qeff while maintaining a low dielectric constant which is a promising result for room temperature transducer applications. The addition of titanium with zinc or iron raised dielectric constant, strain, and polarization with significant increases in the temperature of maximum permittivity. On the other hand, the electromechanical properties of the samples containing barium or zinc with titanium did not exhibit a transition to piezoelectric behavior at the temperature expected from the dielectric measurements.

Original languageEnglish
Pages (from-to)2473-2480
Number of pages8
JournalJournal of the American Ceramic Society
Volume83
Issue number10
DOIs
Publication statusPublished - 2000

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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