Low temperature synthesis of stoichiometric and homogeneous lead zirconate titanate powder by oxalate and hydroxide coprecipitation

Journal Article · Mon Nov 30 23:00:00 EST 1998 · Materials Research Bulletin

DOI:https://doi.org/10.1016/S0025-5408(98)00189-5· OSTI ID:329096

Guiffard, B; Troccaz, M ^[1]

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1. INSA, Villeurbane (France)

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.

• OSTI ID: 329096
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 12 Vol. 33; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCINATION
CHEMICAL PREPARATION
DIELECTRIC PROPERTIES
HYDROXIDES
LEAD OXIDES
OXALATES
PRECIPITATION
TITANIUM OXIDES
ZIRCONIUM OXIDES