Abstract:Mn-added (K,Na)NbO 3 -based composite lead-free piezoelectric ceramic containing KTiNbO 5 phase was fabricated for potential application to high-power fields. The resulting (K,Na)NbO 3 -based composite ceramic with 2 mol % MnO 2 exhibited piezoelectric properties (mechanical quality factor Q m = 650, piezoelectric constantT /¾ 0 = 750, dielectric loss tan ¤ = 0.5 %), and adequate heat resistance (Curie temperature T c = 320 °C). It exhibited an internal electric field, as indicated by a shift of the polarizati… Show more
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