Piezo, ferro and dielectric properties of ceramic-polymer composites of 0-3 connectivity

ABSTRACT

Ferroelectric PZT-PVDF composites (0–3 connectivity) of specific dimensions were made utilizing a hot press technique. Linear variation in the experimental density of the pellets made from 0.1 to 0.8 PZT volume fraction was observed. The surface morphology of the composite has been micro-graphed using SEM. The variation of the dielectric properties of the composites on PZT volume fractions is reported and analyzed. It is observed that there was an increment in dielectric constant (ϵ_r) with an increase in temperature and volume fractions. The piezoelectric strain coefficient (d₃₃) increases with an increase in the volume fraction and voltage coefficient (g₃₃) were calculated. Comparisons were made with the Furukawa model to ϵ_r and d₃₃. The remnant polarization and coercive field were analyzed from the hysteresis plots.

KEYWORDS:

• Hot pressing
• composites
• ferroelectric composite
• piezoelectric strain coefficient
• dielectric properties
• PZT

Acknowledgments

The authors would also thank Dr. Haresh M. Pandya, Associate Professor of Physics, Chikkanna Government Arts College, Tirupur, Tamilnadu, India and A.T Nimal, Scientist F, SSPL- DRDO, New Delhi, India for their support and guidance in measurement of piezoelectric properties and ferroelectric properties in this work.

Funding

This work is financially supported by University Grants Commission [F.No. 42-791/2013 (SR), dated 22.03.2013], New Delhi, India.