Crystallization kinetics and growth mechanism of Pb(Zr sub(0.52).Ti sub(0.48))O sub(3) nanopowders

In this study, Pb(Zr sub(0.52).Ti sub(0.48))O sub(3) nanopowders were synthesized via sol-gel process. Particle morphology, crystalline phases and thermal behavior were characterized by scanning electron microscopy, X-ray diffraction and simultaneous thermal analyzer, respectively. The X-ray diffrac...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2014-07, Vol.116 (1), p.179-183
Main Authors: Khajelakzay, Mohammad, Taheri-Nassaj, Ehsan
Format: Article
Language:English
Subjects:
Crystallization
Lead zirconate titanates
Morphology
Nanostructure
Nucleation
Perovskites
Phases
X-rays
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Summary:In this study, Pb(Zr sub(0.52).Ti sub(0.48))O sub(3) nanopowders were synthesized via sol-gel process. Particle morphology, crystalline phases and thermal behavior were characterized by scanning electron microscopy, X-ray diffraction and simultaneous thermal analyzer, respectively. The X-ray diffraction pattern showed perovskite phase clearly. The non-isothermal activation energy for the perovskite crystallization in Pb(Zr sub(0.52).Ti sub(0.48))O sub(3) gel powders was 224.91 kJ mol super(-1). Both growth morphology parameter (n) and crystallization mechanism index (m) are close to 3.0, indicating that the bulk nucleation is dominant in the perovskite PZT formation. To determine dielectric properties, the calcined Pb(Zr sub(0.52).Ti sub(0.48))O sub(3) nanopowders were pressed using uniaxial press. It was found that the Pb(Zr sub(0.52).Ti sub(0.48))O sub(3) disks, by sintering at 1,200 degree C for 2 and 10 h, and at 1 kHz frequency, had 966 and 1,490 of the dielectric constant, respectively.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-014-8406-3