Effect of CeO2 on dielectric, ferroelectric and piezoelectric properties of PMN-PT (67/33) compositions

Lead magnesium niobate–lead titanate [Pb(Mg1/3Nb2/3)O3–PbTiO3] powders doped with different mole % of CeO2 were prepared by a modified columbite route with compositions corresponding to morphotropic phase boundary (MPB) region. These powders were calcined at 800 °C for 4 h and circular test specimen...

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Bibliographic Details
Published in:Journal of materials science 2007-07, Vol.42 (13), p.4745-4752
Main Authors: SAHOO, Benudhar, PRASANTA KUMAR PANDA
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Cerium oxides
Chemical industry and chemicals
Composition
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Curie temperature
Dielectric properties
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Electrotechnical and electronic ceramics
Exact sciences and technology
Ferroelectric materials
Ferroelectricity
Lead
Lead titanates
Magnesium niobates
Materials science
Niobates, titanates, tantalates, pzt ceramics, etc
Physics
Piezoelectricity
Sintering (powder metallurgy)
Technical ceramics
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Summary:Lead magnesium niobate–lead titanate [Pb(Mg1/3Nb2/3)O3–PbTiO3] powders doped with different mole % of CeO2 were prepared by a modified columbite route with compositions corresponding to morphotropic phase boundary (MPB) region. These powders were calcined at 800 °C for 4 h and circular test specimens were prepared by uniaxial pressing. The specimens were sintered at 1150 °C/2 h, poled at 2 kV/mm d.c. voltage and were characterized for dielectric, ferroelectric and piezoelectric properties. It was observed that the piezoelectric and ferroelectric properties initially increase up to 2 mol% of ceria addition and then decrease with increase in ceria concentration. The diffusivity of the dielectric curves increases with increase in ceria concentration. The decrease in Curie temperature was observed from 173 °C corresponding to pure PMN–PT to a temperature of 138 °C for 10 mol% of ceria addition.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-006-0828-7