Structure and dielectric/piezoelectric properties of LiNbO 3-doped BiScO 3-PbTiO 3 ceramics with morphotropic phase boundary composition

  • Qiang Zhang
  • , Zhenrong Li
  • , Na Zhang
  • , Zhuo Xu

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

0.02LiNbO 3-0.98{(1 - x)BiScO 3-xPbTiO 3} (2LN-BS-xPT) ceramics near the morphotropic phase boundary (MPB) were investigated. MPB region of 2LN-BS-xPT ceramics was identified to be in the composition of 0.62 < x ≤ 0.64. The coexistence of the tetragonal domain structure and a polar microdomain structure was observed by transmission electron microscope for x = 0.64. It is found that 2LN-BS-xPT ceramics (x = 0.64) showed good piezoelectric and ferroelectric properties with piezoelectric constant d 33 about 505 pC/N, planar electromechanical coupling factors k p about 0.47, and remnant polarization P r about 40 μC/cm 2, respectively, while T max is about ~350-400 °C. The high-temperature relaxation behavior was also studied in 2LN-BS-xPT ceramics. Effects of thermal depoling on the piezoelectric properties of 2LN-BS-xPT ceramics indicated good thermal stability before 300 °C for x = 0.62 and 0.64.

Original languageEnglish
Pages (from-to)696-701
Number of pages6
JournalJournal of Materials Science
Volume47
Issue number2
DOIs
StatePublished - Jan 2012

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