Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach
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- Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach
- Khansur, Neamul H.; Groh, Claudia; Jo, Wook; Reinhard, Christina; Kimpton, Justin A.; Webber, Kyle G.; Daniels, John E.
- FREE ELECTROMECHANICAL CERAMICS; FREE PIEZOCERAMICS; GIANT STRAIN; SYSTEM; FERROELECTRICS; PERSPECTIVE; BEHAVIOR; NIOBATE
- Issue Date
- AMER INST PHYSICS
- JOURNAL OF APPLIED PHYSICS, v.115, no.12, pp. -
- The electric-field-induced strain response mechanism in a polycrystalline ceramic/ceramic composite of relaxor and ferroelectric materials has been studied using in situ high-energy x-ray diffraction. The addition of ferroelectric phase material in the relaxor matrix has produced a system where a small volume fraction behaves independently of the bulk under an applied electric field. Inter- and intra-grain models of the strain mechanism in the composite material consistent with the diffraction data have been proposed. The results show that such ceramic/ceramic composite microstructure has the potential for tailoring properties of future piezoelectric materials over a wider range than is possible in uniform compositions.
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