title: Giant piezoelectric voltage coefficient in grain-oriented modified PbTiO3material.
abstract: A rapid surge in the research on piezoelectric sensors is occurring with the arrival of the Internet of Things. Single-phase oxide piezoelectric materials with giant piezoelectric voltage coefficient (g, induced voltage under applied stress) and high Curie temperature (Tc) are crucial towards providing desired performance for sensing, especially under harsh environmental conditions. Here, we report a grain-oriented (with 95% <001> texture) modified PbTiO3ceramic that has a high Tc(364 °C) and an extremely large g33(115 × 10-3Vm N-1) in comparison with other known single-phase oxide materials. Our results reveal that self-polarization due to grain orientation along the spontaneous polarization direction plays an important role in achieving large piezoelectric response in a domain motion-confined material. The phase field simulations confirm that the large piezoelectric voltage coefficient g33originates from maximized piezoelectric strain coefficient d33and minimized dielectric permittivity ɛ33in [001]-textured PbTiO3ceramics where domain wall motions are absent.
authors.affiliation: Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061, USA.|Institute for Critical Technology and Applied Science (ICTAS), Virginia Tech, Blacksburg, Virginia 24061, USA.
authors.forename: Yongke
authors.initials: Y
authors.lastname: Yan
authors.affiliation: Department of Materials Science and Engineering, Michigan Tech, Houghton, Michigan 49931, USA.
authors.forename: Jie E
authors.initials: JE
authors.lastname: Zhou
authors.affiliation: Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061, USA.
authors.forename: Deepam
authors.initials: D
authors.lastname: Maurya
authors.affiliation: Department of Materials Science and Engineering, Michigan Tech, Houghton, Michigan 49931, USA.
authors.forename: Yu U
authors.initials: YU
authors.lastname: Wang
authors.affiliation: Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061, USA.|Institute for Critical Technology and Applied Science (ICTAS), Virginia Tech, Blacksburg, Virginia 24061, USA.
authors.forename: Shashank
authors.initials: S
authors.lastname: Priya