Electromechanical properties of piezoelectric ceramics in the PLZT-PZN system

Shoichiro Nomura, Kumiko Kaneta, Jun Kuwata, Kenji Uchino

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Abstract

Piezoelectric ceramics with the chemical formula Pb1-xLax[(Zr1-yTiy)1-z(Zn1/3Nb2/3)z]1-x/4O3 (x=0.01–0.06, y=0.3–0.6, z=0.1), which are solid solutions composed of PLZT and PZN (Pb(Zn1/3Nb2/3)O3), have been prepared by hot-pressing at 1150°C, and the dielectric and electromechanical properties have been measured. In these materials the rhombohedral-tetragonal morphotropic phase boundary is located in the range of y=0.40–0.43, where the electromechanical coupling factor k33 exceeds 70%. The keff coupling factor for the thickness mode of a plank-shaped bar also reaches nearly as high as 70% in this range. There exists a proportionality between the dielectric and the mechanical losses in the Mn-doped ceramics.

Original languageEnglish (US)
Pages (from-to)179-182
Number of pages4
JournalJapanese Journal of Applied Physics
Volume20
DOIs
Publication statusPublished - Jan 1 1981

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All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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