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Structure–property relations of ferroelectric Pb(Zr0.52Ti0.48)O3–(Bi3.25La0.75)Ti3O12ceramics

Authors
Journal
Current Applied Physics
1567-1739
Publisher
Elsevier
Publication Date
Volume
8
Identifiers
DOI: 10.1016/j.cap.2007.10.047
Keywords
  • Pzt–Blt
  • Microstructure
  • Ferroelectric
  • Dielectric

Abstract

Abstract Ceramics with formula (1 − x)Pb(Zr 0.52Ti 0.48)O 3– x(Bi 3.25La 0.75)Ti 3O 12 (when x = 0, 0.1, 0.3, 0.5, 0.7, 0.9, 1.0) were prepared by a solid-state mixed-oxide method and sintered at 1150 °C for 4 h. All samples had densities at least 95% of theoretical values. Phase analysis using X-ray diffraction indicated the existence of BLT – as well as PZT – based solid solutions with corresponding lattice distortion. Scanning electron micrographs of ceramic surfaces showed a plate-like structure in BLT-rich phase while the typical grain structure was observed for PZT-rich phase. Ferroelectric measurements of these samples showed that addition of small amounts of BLT into PZT increased coercive field and remanent polarization to about 18 kV/cm and 12.5 μC/cm 2, respectively. Further increasing the amount of BLT in PZT degraded the ferroelectric properties of the ceramics. This behavior was in agreement with their microstructures and dielectric properties.

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