title: Giant strain with ultra-low hysteresis and high temperature stability in grain oriented lead-free K0.5Bi0.5TiO3-BaTiO3-Na0.5Bi0.5TiO3 piezoelectric materials.
abstract: We synthesized grain-oriented lead-free piezoelectric materials in (K0.5Bi0.5TiO3-BaTiO3-xNa0.5Bi0.5TiO3 (KBT-BT-NBT) system with high degree of texturing along the [001]c (c-cubic) crystallographic orientation. We demonstrate giant field induced strain (~0.48%) with an ultra-low hysteresis along with enhanced piezoelectric response (d33 ~ 190pC/N) and high temperature stability (~160°C). Transmission electron microscopy (TEM) and piezoresponse force microscopy (PFM) results demonstrate smaller size highly ordered domain structure in grain-oriented specimen relative to the conventional polycrystalline ceramics. The grain oriented specimens exhibited a high degree of non-180° domain switching, in comparison to the randomly axed ones. These results indicate the effective solution to the lead-free piezoelectric materials.
authors.affiliation: Bio-inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, 24061 USA.
authors.forename: Deepam
authors.initials: D
authors.lastname: Maurya
authors.affiliation: Bio-inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, 24061 USA.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA 24061, USA.
authors.forename: Yaojin
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Bio-inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, 24061 USA.
authors.forename: Yongke
authors.initials: Y
authors.lastname: Yan
authors.affiliation: Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA 24061, USA.
authors.forename: Jiefang
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA 24061, USA.
authors.forename: Dwight
authors.initials: D
authors.lastname: Viehland
authors.affiliation: Bio-inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, 24061 USA.
authors.forename: Shashank
authors.initials: S
authors.lastname: Priya