Non-resonant electromechanical energy harvesting using inter-ferroelectric phase transitions

作者：Moyet Richard Perez; Stace Joseph; Amin Ahmed; Finkel Peter; Rossetti George A Jr^*

来源：Applied Physics Letters, 2015, 107(17): 172901.

DOI：10.1063/1.4934591

Non-resonant electromechanical energy harvesting is demonstrated under low frequency excitation (<50 Hz) using [110](C)-poled lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric single crystals with compositions near the morphotropic phase boundary. The efficiency of power generation at the stress-induced phase transition between domain-engineered rhombohedral and orthorhombic ferroelectric states is as much as four times greater than is obtained in the linear piezoelectric regime under identical measurement conditions but during loading below the coercive stress of the phase change. The phase transition mode of electromechanical transduction holds potential for non-resonant energy harvesting from low-frequency vibrations and does not require mechanical frequency up-conversion.

• 出版日期2015-10-26