Mn- and Mn/Cu-doped PIN-PMN-PT piezoelectric ceramics for high-power transducers
JOURNAL OF THE AMERICAN CERAMIC SOCIETY(2020)
摘要
The effects of acceptor doping with manganese as either MnO(2)or MnNb2O6(MnN) with CuO on the dielectric, ferroelectric, and piezoelectric properties of PIN-PMN-PT ceramics were investigated. The 2% MnNb2O6-doped PIN-PMN-PT (6Pb(Mn1/3Nb2/3)O-3-25Pb(In1/2Nb1/2)O-3-34Pb(Mg1/3Nb2/3)O-3-35PbTiO(3)) ceramics possessed hard properties such as high coercive field (E-C) of 11.7 kV/cm, low dielectric loss (tan delta) of 0.7%, and high electromechanical quality factor (Q(M)) of 1011. These properties were diminished in MnO2-doped ceramics because of lower oxygen vacancy defect concentration, and exaggerated grain growth resulted in >20 mu m grain size. Co-doping with 2 mol% MnNb(2)O(6)and 0.5 mol% CuO retained hardened properties such as highE(C)of 9.6 kV/cm, low tan delta of 0.6%, and highQ(M)of 1029. MnNb2O6-doped and MnNb2O6 + Cu co-doped ceramics display excellent figures of merit for resonance and off-resonance applications as well as high energy conversion efficiencies which make them promising candidates for high-power transducer elements.
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关键词
ceramics,dielectric materials,properties,ferroelectricity,ferroelectric materials,perovskites,piezoelectric materials,properties
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