Thin plates of perovskite ferroelectric lead lanthanum zirconate titanate (PLZT) ceramics bonded to plastic substrates strained in flexure have shown the ability to withstand large tensile strains (∼10−3). This ability results from two interrelated mechanisms: (i) a structural phase change, and (ii) ferroelastic switching of the polarization direction. In the experiments on which these conclusions are based, crystal structure was determined from x‐ray data and strain was determined from both x‐ray and resistance wire strain gauge data. The results presented here establish that PLZT materials show ferroelastic behavior.

Topics
Ferroelasticity, Ferroelectric materials, Perovskites, Strain gauge, Ceramics
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© 1971 The American Institute of Physics.
1971
The American Institute of Physics
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