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Title: Influences of temperature and electric field on the bending strength of lead zirconate titanate ceramics

Abstract

The present work studies the effects of temperature and a d.c. electric field on the bending strength of PZT-841 ceramics using three-point bending measurement. In the temperature range from 30 C to the Curie point T{sub c} ({approximately}272 C), the bending strength as a function of temperature exhibits a valley shape and the valley floors at a temperature around 225 C, revealing a 25% reduction in comparison with the bending strength at room temperature. Meanwhile, elastic compliance and damping factor exhibit peaks, respectively, at 225 C and 220 C, implying a strong correlation between bending strength and compliance. A positive or negative electric field larger than 3 kV/cm reduces the bending strength of PZT-841 ceramics significantly. For example, the bending strength under a positive field of 20 kV/cm is only one half of that without application of any electric field. The electric field is able to fracture mechanically sustained samples. Under a constant load of 70 MPa, the mean value of the critical electric field at fracture is 11.0 kV/cm. A 90{degree}-domain wall kinetic model is herein proposed to understand the observed phenomena.

Authors:
;
Publication Date:
Research Org.:
Hong Kong Univ. of Science and Technology, Kowloon (HK)
OSTI Identifier:
20075929
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 48; Journal Issue: 8; Other Information: PBD: 11 May 2000; Journal ID: ISSN 1359-6454
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FLEXURAL STRENGTH; LEAD OXIDES; ZIRCONIUM OXIDES; TITANIUM OXIDES; TEMPERATURE DEPENDENCE; ELECTRIC FIELDS; FRACTURES; MATHEMATICAL MODELS

Citation Formats

Fu, R., and Zhang, T.Y. Influences of temperature and electric field on the bending strength of lead zirconate titanate ceramics. United States: N. p., 2000. Web. doi:10.1016/S1359-6454(00)00010-0.
Fu, R., & Zhang, T.Y. Influences of temperature and electric field on the bending strength of lead zirconate titanate ceramics. United States. doi:10.1016/S1359-6454(00)00010-0.
Fu, R., and Zhang, T.Y. Thu . "Influences of temperature and electric field on the bending strength of lead zirconate titanate ceramics". United States. doi:10.1016/S1359-6454(00)00010-0.
@article{osti_20075929,
title = {Influences of temperature and electric field on the bending strength of lead zirconate titanate ceramics},
author = {Fu, R. and Zhang, T.Y.},
abstractNote = {The present work studies the effects of temperature and a d.c. electric field on the bending strength of PZT-841 ceramics using three-point bending measurement. In the temperature range from 30 C to the Curie point T{sub c} ({approximately}272 C), the bending strength as a function of temperature exhibits a valley shape and the valley floors at a temperature around 225 C, revealing a 25% reduction in comparison with the bending strength at room temperature. Meanwhile, elastic compliance and damping factor exhibit peaks, respectively, at 225 C and 220 C, implying a strong correlation between bending strength and compliance. A positive or negative electric field larger than 3 kV/cm reduces the bending strength of PZT-841 ceramics significantly. For example, the bending strength under a positive field of 20 kV/cm is only one half of that without application of any electric field. The electric field is able to fracture mechanically sustained samples. Under a constant load of 70 MPa, the mean value of the critical electric field at fracture is 11.0 kV/cm. A 90{degree}-domain wall kinetic model is herein proposed to understand the observed phenomena.},
doi = {10.1016/S1359-6454(00)00010-0},
journal = {Acta Materialia},
issn = {1359-6454},
number = 8,
volume = 48,
place = {United States},
year = {2000},
month = {5}
}