title: Upshift of phase transition temperature in nanostructured PbTiO3 thick film for high temperature applications.
abstract: Thick polycrystalline pure PbTiO3 films with nano size grains were synthesized for the first time by aerosol deposition. Annealed 7 μm thick films exhibit well-saturated ferroelectric hysteresis loops with a remanent polarization and coercive field of 35 μC/cm(2) and 94 kV/cm, respectively. A large-signal effective d33,eff value of >60 pm/V is achieved at room temperature. The measured ferroelectric transition temperature (Tc) of the films ∼550 °C is >50 °C higher than the reported values (∼490 °C) for PbTiO3 ceramics. First-principles calculations combined with electron energy loss spectroscopy (EELS) and structural analysis indicate that the film is composed of nano size grains with slightly decreased tetragonality. There is no severe off-stoichiometry, but a high compressive in-plane residual stress was observed in the film along with a high transition temperature and piezoelectric response. The ferroelectric characteristics were sustained until 200 °C, providing significant advancement toward realizing high temperature piezoelectric materials.
authors.affiliation: Functional Ceramics Group, and ‡Advanced Characterization & Analysis Group, Korea Institute of Materials Science (KIMS) , Changwon 641-831, Korea.
authors.forename: Jungho
authors.initials: J
authors.lastname: Ryu
authors.forename: Guifang
authors.initials: G
authors.lastname: Han
authors.forename: Tae Kwon
authors.initials: TK
authors.lastname: Song
authors.forename: Aaron
authors.initials: A
authors.lastname: Welsh
authors.forename: Susan
authors.initials: S
authors.lastname: Trolier-McKinstry
authors.forename: Hongsoo
authors.initials: H
authors.lastname: Choi
authors.forename: Jong-Pil
authors.initials: JP
authors.lastname: Lee
authors.forename: Jong-Woo
authors.initials: JW
authors.lastname: Kim
authors.forename: Woon-Ha
authors.initials: WH
authors.lastname: Yoon
authors.forename: Jong-Jin
authors.initials: JJ
authors.lastname: Choi
authors.forename: Dong-Soo
authors.initials: DS
authors.lastname: Park
authors.forename: Cheol-Woo
authors.initials: CW
authors.lastname: Ahn
authors.forename: Shashank
authors.initials: S
authors.lastname: Priya
authors.forename: Si-Young
authors.initials: SY
authors.lastname: Choi
authors.forename: Dae-Yong
authors.initials: DY
authors.lastname: Jeong