Large Piezoelectric Stability and Low Polarization Fatigue in 6Pb(Sc 1/2 Nb 1/2 )O 3 -70Pb(Mg 1/3 Nb 2/3 )O 3 -24PbTiO 3 Crystals
作者： Pinyang Fang , Xiaojuan Li , Qi Jing , Zengzhe Xi , Wei Long
DOI: 10.1007/S11664-019-07007-X
关键词:
摘要: The electrical properties and polarization fatigue of [001]-oriented 6Pb(Sc1/2Nb1/2)O3-70Pb(Mg1/3Nb2/3)O3-24PbTiO3 (6PSN-70PMN-24PT) crystals were investigated. Compared with binary Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) crystals, the ternary 6PSN-70PMN-24PT crystal showed a higher rhombohedral → tetragonal transition temperature (TR-T = 120°C) larger coercive field (Ec = 4 kV/cm). It was found that piezoelectric constant (d33 ≈ 1200 pC/N) electromechanical coupling coefficient (kt ≈ 61%) weakly dependent on thermal annealing (Ta), maintaining over 90% original value at Ta < 120°C, indicating excellent stability. Electric measurements exhibited slight characteristics below 105 bipolar cycles, while PMN-PT sudden degradation when cycle numbers above 102 cycles. improved stability for attributed to large field. physical mechanisms enhanced high discussed based repulsive energy polar domains.
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