We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Influence of stress on the electromechanical properties and the phase transitions of lead-free (1 − x)Ba(Zr<sub>0.2</sub>Ti<sub>0.8</sub>)O<sub>3</sub>–x(Ba<sub>0.7</sub>Ca<sub>0.3</sub>)TiO<sub>3</sub>.
- Authors
Gadelmawla, Ahmed; Dobesh, David; Eckstein, Udo; Grübl, Oliver; Ehmke, Matthias; Cicconi, Maria Rita; Khansur, Neamul H.; de Ligny, Dominique; Webber, Kyle G.
- Abstract
The influence of stress on the phase boundaries of polycrystalline lead-free perovskite (1 − x)Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 (x = 0.4, 0.5, and 0.6) was characterized through the temperature- and stress-dependent small-signal dielectric and piezoelectric response from − 150 to 200 °C under uniaxial compressive stress up to − 75 MPa. For all three compositions, the phase transition temperatures separating the rhombohedral, orthorhombic, tetragonal, and cubic phases were shifted to higher temperatures with an increase in the uniaxial mechanical loading, corresponding to a significant decrease in the dielectric and piezoelectric responses. Additional stress-dependent relative permittivity measurements up to − 260 MPa were conducted at four different constant temperatures (− 10, 10, 25, and 40 °C), revealing significant increases in the dielectric response, making these materials interesting for tunable dielectric applications. Furthermore, the stress-induced shift in phase transition temperatures was confirmed by in situ combined temperature- and stress-dependent Raman spectroscopy measurements under different constant uniaxial loads within the temperature range from 30 to 130 °C.
- Subjects
PHASE transitions; TRANSITION temperature; PERMITTIVITY measurement; PERMITTIVITY; RAMAN spectroscopy
- Publication
Journal of Materials Science, 2022, Vol 57, Issue 35, p16581
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-022-07685-9