Structural, ferroelectric and piezoelectric properties of chemically processed, low temperature sintered piezoelectric BZT-BCT ceramics

0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3TiO3) nanopowders were synthesized at very low temperature using a soft chemical approach. The synthesized powders and the consolidated disks were structurally characterized thoroughly by XRD, SEM, TEM and EPMA and also by ultraviolet and Raman spectroscopy. The 135...

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Bibliographic Details
Published in:Materials research express 2016-03, Vol.3 (3), p.35702-035702
Main Authors: Roy, Subir, Maharana, Rajalaxmi, Reddy, S Rangaswamy, Singh, Sarabjit, Kumar, Pawan, Karthik, T, Asthana, Saket, Prasad, V V Bhanu, Kamat, S V
Format: Article
Language:English
Subjects:
BZT-BCT
chemical synthesis
Density
Dielectric loss
diffused phase transition
Disks
Nanostructure
piezoelectric property
Piezoelectricity
Polarization
remnant polarization
Sintering (powder metallurgy)
Synthesis (chemistry)
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Summary:0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3TiO3) nanopowders were synthesized at very low temperature using a soft chemical approach. The synthesized powders and the consolidated disks were structurally characterized thoroughly by XRD, SEM, TEM and EPMA and also by ultraviolet and Raman spectroscopy. The 1350 °C sintered BZT-BCT disk displayed the highest density, underwent diffused phase transition centered at ∼100 °C and showed the highest dielectric constant (8917) and lowest dielectric loss (0.015). The sintered BZT-BCT sample with the highest density showed a maximum polarization (Pmax) of 13 C cm-2 and remnant polarization of 6 C cm-2. The same sample exhibited very high electrostrain of ∼0.12% under a relatively low electrical field of 3.5 kV mm−1.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/3/3/035702