High power characteristics of lead-free piezoelectric ceramics



Publication Details

Lee, H., Ural, S. O., Chen, L., Uchino, K. & Zhang, S. (2012). High power characteristics of lead-free piezoelectric ceramics. Journal of the American Ceramic Society, 95 (11), 3383-3386.


High power characteristics of lead-free (Bi,Na)TiO 3 (BNT) and BaTiO 3 (BT)-based piezoceramics were investigated and compared to commercial "hard" Pb(Zr,Ti)O 3 PZT materials. Acceptor-modified BNT and BT-based ceramics showed typical "hardening" characteristics, exhibiting high mechanical quality factor Q m > 800 and low dielectric loss, < 0.01, comparable to "hard" PZT ceramics. Of particular significance is that BNT-based ceramics were found to exhibit minimal variation of resonance frequency shift and high Q m under high level vibration velocity, being ∼0.6% and ∼800 at 0.25 m/s, respectively, due to the high domain stability associated with their high coercive fields, being on the order of 35 kV/cm.

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