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Author Guiffard, B. ♦ Troccaz, M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ DIELECTRIC PROPERTIES ♦ CHEMICAL PREPARATION ♦ LEAD OXIDES ♦ ZIRCONIUM OXIDES ♦ TITANIUM OXIDES ♦ PRECIPITATION ♦ HYDROXIDES ♦ OXALATES ♦ CALCINATION
Abstract A wet procedure to prepare stoichiometric and homogeneous PZT powder (Pb(Zr{sub 0.52}Ti{sub 0.48})O{sub 3}) is described. Starting reagents are tetra-n-butyl zirconate, titanate, and lead acetate. The synthesis is based upon the coprecipitation of metal hydroxides Pb(OH){sub 2}, ZrO(OH){sub 2}, TiO(OH){sub 2} and lead oxalate PbC{sub 2}O{sub 4} in the pH range 9--10. Monophasic and sub-micrometer-sized PZT powder was obtained by calcination of the mixture of hydroxides and oxalate at 700 C. The study shows that highly tetragonal PZT phase appeared after heating at 500 C only. No intermediate phase such as PbTiO{sub 3} was detected. The presence of two different lead precursors in the precipitate--Pb(OH){sub 2} and PbC{sub 2}O{sub 4}--involved this low-temperature PZT formation without intermediate mixed oxide. Dense and compositionally homogeneous PZT ceramics were obtained by sintering the calcined powder at 1200 C. These samples exhibited good dielectric and piezoelectric properties.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 1998-12-01
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 33
Issue Number 12


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