Piezoelectric properties of [001]-textured high-power PMnN-PZT piezoceramics sintered at a low temperature

초록

The 1.0 mol% CuO-added 0.14Pb(Mn1/3Nb2/3)O-3-0.86Pb(Zr0.55Ti0.45)O-3 (CPMnN-PZT) piezoceramics were synthesized at low temperatures (<= 950 degrees C) by the columbite method to remove the pyrochlore phase. It exhibited a high Q(m) of 3016 and a high T-C of 309 degrees C. However, it showed small d(33) and k(p) values of 143 pC/N and 0.43, respectively. The CPMnN-PZT piezoceramic was textured along the [001] direction using BaTiO3 (BT) templates to enhance its soft piezoelectric properties. The [001]-textured CPMnN-PZT + y vol% BT piezoceramics (1.0 <= y <= 5.0) were densified at a low temperature of 950 degrees C with a high Lotgering factor (>= 92%). The textured sample (y = 1.0) showed a high Q(m) of 1400 with increased d(33) and k(p) values of 278 pC/N and 0.58, respectively, and its piezoelectricity showed excellent temperature stability up to 225 degrees C. Therefore, the textured CPMnN-PZT sample can be used for developing high-power piezoelectric devices.

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