Crossref journal-article
AIP Publishing
Journal of Applied Physics (317)
Abstract

The effect of uniaxial stress up to 400 MPa (4 kbar) on a number of mechanical and dielectric properties of Ba0.92Ca0.08TiO3 ceramic has been studied. The various results have been interpreted in terms of domain reorientation processes (90° switching) which occur in response to the applied stress. The measurements made include the following: (1) logitudinal sound velocity normal to the stress direction at 23 °C, (2) mechanical strain parallel and normal to the stress direction at 23 °C, (3) dielectric constant ε3 parallel to the stress direction at 23 °C, (4) ε3 as a function of temperature in the range 23–160 °C at various stress levels, and (5) electrical hysteresis loops at 23 °C with poling field parallel to the stress direction. The samples used in experiments (1) – (4) were unpoled. Experiments (1), (2), (3), and (5) indicate anomalous behavior in the 0–200-MPa range which can be explained qualitatively in terms of domain reorientation effects, and this interpretation has been confirmed by annealing experiments which rerandomize the domains. Experiment (4) shows that the Curie temperature Tc increases with increasing stress. This is to be contrasted to the decrease of Tc as a function of hydrostatic pressure and can again be explained as due to domain reorientation effects. For experiments (1) – (3), a quantitative calculation has been made of the magnitude of the anomalies to be expected for complete reorientation by utilizing a modified Voigt averaging scheme, and the results are in good agreement with the measured values.

Bibliography

Fritz, I. J. (1978). Ultrasonic, dilatometric, and dielectric study of uniaxial-stress effects in a barium-calcium titanate ceramic. Journal of Applied Physics, 49(2), 788–794.

Authors 1
  1. I. J. Fritz (first)
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Dates
Type When
Created 22 years, 6 months ago (Feb. 14, 2003, 4:46 p.m.)
Deposited 1 year, 6 months ago (Feb. 4, 2024, 3:20 p.m.)
Indexed 1 year ago (Aug. 6, 2024, 8:41 a.m.)
Issued 47 years, 6 months ago (Feb. 1, 1978)
Published 47 years, 6 months ago (Feb. 1, 1978)
Published Print 47 years, 6 months ago (Feb. 1, 1978)
Funders 0

None

@article{Fritz_1978, title={Ultrasonic, dilatometric, and dielectric study of uniaxial-stress effects in a barium-calcium titanate ceramic}, volume={49}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.324658}, DOI={10.1063/1.324658}, number={2}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Fritz, I. J.}, year={1978}, month=feb, pages={788–794} }