Identification and effect of secondary phase in MnO2-doped 0.8Pb(Zr0.52Ti0.48)O3-0.2Pb(Zn 1/3Nb2/3)O3 piezoelectric ceramics

Yongke Yan, Kyung Hoon Cho, Shashank Priya

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Abstract

0.8 Pb(Zr0.52Ti0.48)O3-0.2 Pb(Zn 1/3Nb2/3)O3 (PZT-PZN) and 2 mol% Mn-doped PZT-PZN ceramics were investigated to deterministically identify the presence and effect of the secondary phase in controlling electrical properties. On the basis of the X-ray diffraction and energy dispersive spectroscopy analysis, we show that secondary phase in Mn-doped PZT-PZN is not MnO2 precipitate, but it is related to the formation of ZnO. This result was found to be consistent with the grain growth observed in the Mn-doped sintered ceramics and changes in ferroelectric behavior. We propose that Mn3+ substitution on Ti and Zr site induces hardening effect, whereas Mn2+ substitution on Zn-site stabilizes the perovskite phase in synthesis of PZT-PZN.

Original languageEnglish (US)
Pages (from-to)3953-3959
Number of pages7
JournalJournal of the American Ceramic Society
Volume94
Issue number11
DOIs
StatePublished - Nov 1 2011

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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