Journal of Pure and Applied Ultrasonics

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Electrical Properties of Tantalum Modified PCT Ceramics


Affiliations
1 Electroceramics Group, Solid State Physics Laboratory, Lucknow Road, Delhi-110054, India
2 School of Physics & Materials Science, Thapar Institute of Engineering & Technology, Patiala-147004, India
 

Tantalum substituted lead calcium titanate ceramics with composition Pb0.76Ca0.24Mn0.02Ti0.98-5x/4TaxO3; where x=0-0.05 in steps of 0.01 were prepared by conventional mixed-oxide method. Structural behaviour has been studied using XRD and SEM. Single phase with perovskite type tetragonal structure was observed. SEM results show the decrease in grain size and increase in porosity with increase in Ta5+. Dielectric behaviour as a function of temperature at different frequencies was examined. Room temperature value of ε' decreases with Ta5+ content. The position of TC also shifts to lower temperature. It has been found that the dh of PbTiO3 ceramics is about twice that of PZT ceramics making it suitable for acoustic applications. It has also been observed that the d33 decreases with the increase in the amount of Ta5+.
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  • Electrical Properties of Tantalum Modified PCT Ceramics

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Authors

Sarabjit Singh
Electroceramics Group, Solid State Physics Laboratory, Lucknow Road, Delhi-110054, India
O. P. Thakur
Electroceramics Group, Solid State Physics Laboratory, Lucknow Road, Delhi-110054, India
Chandra Prakash
School of Physics & Materials Science, Thapar Institute of Engineering & Technology, Patiala-147004, India
K. K. Raina
School of Physics & Materials Science, Thapar Institute of Engineering & Technology, Patiala-147004, India

Abstract


Tantalum substituted lead calcium titanate ceramics with composition Pb0.76Ca0.24Mn0.02Ti0.98-5x/4TaxO3; where x=0-0.05 in steps of 0.01 were prepared by conventional mixed-oxide method. Structural behaviour has been studied using XRD and SEM. Single phase with perovskite type tetragonal structure was observed. SEM results show the decrease in grain size and increase in porosity with increase in Ta5+. Dielectric behaviour as a function of temperature at different frequencies was examined. Room temperature value of ε' decreases with Ta5+ content. The position of TC also shifts to lower temperature. It has been found that the dh of PbTiO3 ceramics is about twice that of PZT ceramics making it suitable for acoustic applications. It has also been observed that the d33 decreases with the increase in the amount of Ta5+.