Indian Journal of Pure and Applied Physics

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Study of Electrical Properties of Lead-free BCZT Ceramic (Ba0.80Ca0.20Zr0.1Ti0.9)O3 at Different Sintering Temperatures


Affiliations
1 Motilal Nehru College, Department of Physics, University of Delhi, Delhi 110 021, India
2 Sri Venkateshwara College, Department of Physics, University of Delhi, Delhi 110 021, India
 

There is a tremendous growth in the demand for high performance lead-free ceramics due to environmental issues. In the present work, the traditional solid-state sintering technique at different sintering temperatures, namely, 1380, 1400 and 1420oC has been employed to prepare lead-free (Ba0.80Ca0.20Zr0.1Ti0.9)O3 ceramics. Detailed XRD analysis suggests pure perovskite structure for the ceramic synthesized at higher sintering temperature 1420oC without any impurities. Density measurement using Archimedes principle shows a trend of increased densification with increasing sintering temperature. Room temperature frequency dependent dielectric constant study indicates high value of dielectric constant ((εrt= 2665-2490) in the frequency range100 Hz-100 kHz for the ceramic sintered at 1420oC. Temperature dependent dielectric studies at constant frequency (10 kHz) indicates that ceramic prepared at 1420oC has high Curie temperature Tc =77oC. Ferroelectric properties of the ceramics are enhanced by raising the sintering temperature from 1380 to 1420oC with higher spontaneous polarisation of Ps = 7.68 μC/cm2 corresponding to 1420oC ceramic. The reasonably high values of Curie temperature, room temperature dielectric constant in the large frequency range and improved ferroelectric properties of the ceramic prepared at 1420oC indicate that this ceramic can be a good candidate for being developed into commercially viable lead-free ferroelectric material.

Keywords

Lead free; Dielectric properties; Sintering temperature.
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  • Study of Electrical Properties of Lead-free BCZT Ceramic (Ba0.80Ca0.20Zr0.1Ti0.9)O3 at Different Sintering Temperatures

Abstract Views: 94  |  PDF Views: 44

Authors

Sanjeev Kumar
Motilal Nehru College, Department of Physics, University of Delhi, Delhi 110 021, India
Saraswati Rawat
Sri Venkateshwara College, Department of Physics, University of Delhi, Delhi 110 021, India
K. Chandramani Singh
Sri Venkateshwara College, Department of Physics, University of Delhi, Delhi 110 021, India

Abstract


There is a tremendous growth in the demand for high performance lead-free ceramics due to environmental issues. In the present work, the traditional solid-state sintering technique at different sintering temperatures, namely, 1380, 1400 and 1420oC has been employed to prepare lead-free (Ba0.80Ca0.20Zr0.1Ti0.9)O3 ceramics. Detailed XRD analysis suggests pure perovskite structure for the ceramic synthesized at higher sintering temperature 1420oC without any impurities. Density measurement using Archimedes principle shows a trend of increased densification with increasing sintering temperature. Room temperature frequency dependent dielectric constant study indicates high value of dielectric constant ((εrt= 2665-2490) in the frequency range100 Hz-100 kHz for the ceramic sintered at 1420oC. Temperature dependent dielectric studies at constant frequency (10 kHz) indicates that ceramic prepared at 1420oC has high Curie temperature Tc =77oC. Ferroelectric properties of the ceramics are enhanced by raising the sintering temperature from 1380 to 1420oC with higher spontaneous polarisation of Ps = 7.68 μC/cm2 corresponding to 1420oC ceramic. The reasonably high values of Curie temperature, room temperature dielectric constant in the large frequency range and improved ferroelectric properties of the ceramic prepared at 1420oC indicate that this ceramic can be a good candidate for being developed into commercially viable lead-free ferroelectric material.

Keywords


Lead free; Dielectric properties; Sintering temperature.

References