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Effects of Sintering Temperature on the Dielectric and Piezoelectric Properties of Nb-Doped PZT Ceramics and Their Applications
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2003
Year
Materials ScienceNb-doped Pzt CeramicsElectrical EngineeringEngineeringNb AdditivesCeramic PowdersMechanical EngineeringCeramics MaterialsFerroelectric MaterialsPzt-based CeramicsPiezoelectric MaterialsPiezoelectric PropertiesPiezoelectric MaterialPiezoelectricityAcoustic Wave DevicesElectrical PropertiesTheir Applications
Abstract The PZT-based ceramics with a composition of Pb1 − 0.5x (Zr0.52Ti0.48)1 − x Nb x O3; x = 0.04–0.06 were prepared by conventional mixed-oxide method, with sintering temperature at 1200°–1300° for 2 hours. Microstructural and compositional analyses of the PZT-based ceramics have been carried out using XRD and SEM. The dielectric constant measured at 1 kHz is about 1500 and the loss factor is small than 2%. The maximum planar electromechanical coupling coefficient, k p , is 0.59. It showed that the Nb additives were helpful improve both of the dielectric and piezoelectric properties. Surface acoustic wave (SAW) filters were fabricated and the property, phase velocity, were measured. Keywords: PZT dielectric properties piezoelectricity surface acoustic wave (SAW)