Pb(Zr,Ti)O 3 –Pb(Mn 1/3 Nb 2/3 )O 3 (PZT–PMnN) system has been studied for high‐power piezoelectric applications. This study investigates this system to find out the composition with high‐power density piezoelectric characteristics and low tem‐perature coefficient of resonance frequency (TCF). It was found that the composition 0.9PZT–0.1PMnN (Zr/Ti = 0.51/0.49) modified with 6 mol% Sr exhibits a TCF of −8 ppm/°C (−20 to +80°C). Further, the dielectric and piezoelectric properties of this composition are as follows: k p = 0.53; Q m = 800; d 33 = 274; ε 33 /ε 0 = 1290 and tan δ=1.1%, which shows the suitability of this composition for ultrasonic devices used under fluctuating thermal environment.
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Priya et al. (2004) studied this question.
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