Field-induced recoverable strain behavior of CuO-added K0.5Na0.5NbO3 ceramics and 1–3 fiber/epoxy piezocomposites
作者： Ebru Mensur Alkoy
DOI: 10.1063/1.3503845
关键词: Composite material 、 Antiferroelectricity 、 Materials science 、 Permittivity 、 Epoxy 、 Hysteresis 、 Dielectric 、 Electric field 、 Fiber 、 Ceramic
摘要: Lead-free, dense, 1 mol % CuO-added potassium sodium niobate K0.5Na0.5NbO3 (KNN) fibers were successfully drawn using a novel alginate gelation technique. Piezocomposites with 1–3 connectivity prepared an epoxy matrix various fiber volume fractions (Vf). Electrical properties of the piezocomposites investigated and compared bulk KNN ceramics same composition. The dielectric constant found to increase from 67 191 addition CuO into increasing Vf in piezocomposite. A constricted, antiferroelectriclike double hysteresis polarization versus electric field (P-E) loop was observed KNN. large fully recoverable electrostrain 0.07% measured for 0.03% under 50 kV/cm, respectively. P-E nature due CuNb‴–VO•• defect dipoles creating internal that restores original d...
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