Single-calcination synthesis of pyrochlore-free Pb(Ni1/3Nb 2/3)O3-PbTiO3 using a coating method

Ping Hua Xiang, Ni Zhong, Xian Lin Dong

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Pyrochlore-free 0.64Pb(Ni1/3Nb2/3)O 3-0.36PbTiO3 (0.64PNN-0.36PT) powder has been successfully synthesized by only one calcination step using a coating method. The formation of pyrochlore phase is prevented by coating NiCO 3·2Ni(OH)2·2H2O on Nb 2O5 particles. NiCO3·2Ni(OH) 2·2H2O-coated Nb2O5 powder is prepared by heterogeneous precipitation method. The coating structure is confirmed by transmission electron microscope (TEM) with energy dispersive spectroscope (EDS). Single calcination treatment of the coating powder mixed with appropriate amounts of Pb3O4 and TiO2 powders at 900 °C for 2 h produces the pure-perovskite 0.64PNN-0.36PT powder. The elimination of the pyrochlore phase can be explained in terms of the separating of Pb3O4 and Nb2O5 by the NiCO3·2Ni(OH)2·2H2O coating layer.

Original languageEnglish
Pages (from-to)699-701
Number of pages3
JournalSolid State Communications
Volume127
Issue number11
DOIs
StatePublished - Sep 2003
Externally publishedYes

Keywords

  • A. Ferroelectrics
  • A. Lead nickel niobate
  • B. Coating method
  • C. Morphotropic phase boundary

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