Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals

Seung Eek Park, Thomas R. Shrout

Research output: Contribution to journalArticlepeer-review

3971 Scopus citations


The piezoelectric properties of relaxor based ferroelectric single crystals, such as Pb(Zn1/3Nb2/3)O3-PbTiO3 and Pb(Mg1/3Nb2/3)O3-PbTiO3 were investigated for electromechanical actuators. In contrast to polycrystalline materials such as Pb(Zr,Ti)O3, morphotropic phase boundary compositions were not essential for high piezoelectric strain. Piezoelectric coefficients (d33's)>2500 pC/N and subsequent strain levels up to >0.6% with minimal hysteresis were observed. Crystallographically, high strains are achieved for 〈001〉 oriented rhombohedral crystals, although 〈111〉 is the polar direction. Ultrahigh strain levels up to 1.7%, an order of magnitude larger than those available from conventional piezoelectric and electrostrictive ceramics, could be achieved being related to an E-field induced phase transformation. High electromechanical coupling (k33)>90% and low dielectric loss <1%, along with large strain make these crystals promising candidates for high performance solid state actuators.

Original languageEnglish (US)
Pages (from-to)1804-1811
Number of pages8
JournalJournal of Applied Physics
Issue number4
StatePublished - Aug 15 1997

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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