Browsing NTNU Open by Author "Daniels, John E."
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Effect of mechanical depoling on piezoelectric properties of Na0.5Bi0.5TiO3 - xBaTiO3 in the morphotropic phase boundary region
Denis, L; Glaum, Julia; Hoffman, Mark; Daniels, John E.; Hooper, Ryan; Tutuncu, Goknur; Forrester, Jennifer; Jones, Jacob L. (Journal article; Peer reviewed, 2018)The effect of mechanical stress on the direct piezoelectric properties of pre-poled (1 − x)(Na0.5Bi0.5)TiO3–xBaTiO3 (NBT–xBT) in the range 4% ≤ x ≤ 13% was studied in situ using a mechanical load frame. Prior to mechanical ... -
Effect of porosity on the ferroelectric and piezoelectric properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 piezoelectric ceramics
Yap, Emily; Glaum, Julia; Oddershede, Jette; Daniels, John E. (Peer reviewed; Journal article, 2018)The ferroelectric and piezoelectric properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT) ceramics were measured as a function of porosity. Porous BCZT ceramics were fabricated using the sacrificial fugitive technique. Two ... -
Nonlinear mechanical behaviour of Ba0.5Sr0.5Co0.8Fe0.2O3 − δ and in situ stress dependent synchrotron X-ray diffraction study
Geiger, Philipp T.; Clemens, Oliver; Khansur, Neamul H.; Hinterstein, Manuel; Sahini, Mtabazi Geofrey; Grande, Tor; Tung, Patrick; Daniels, John E.; Webber, Kyle G. (Journal article; Peer reviewed, 2017)Perovskite type Ba0.5Sr0.5Co0.8Fe0.2O3 − δ ceramics display nonlinear stress-strain behaviour upon uniaxial compression at room temperature. Step functional loading experiments show that the nonlinear strain response of ... -
Poling-induced inverse time-dependent microstrain mechanisms and post-poling relaxation in bismuth ferrite
Liu, Lisha; Rojac, Tadej; Kimpton, Justin; Walker, Julian; Makarovic, Maja; Li, Jing-Feng; Daniels, John E. (Peer reviewed; Journal article, 2020)Domain-wall dynamics under strong, super-coercive electric fields in polycrystalline bismuth ferrite (BiFeO3) are not well established due to the experimental difficulties in processing high phase purity perovskite with ...