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Giant piezoelectric voltage coefficient in grain-oriented modified PbTiO 3 material
Ist Teil von
Nature communications, 2016-10, Vol.7, p.13089
Ort / Verlag
England
Erscheinungsjahr
2016
Quelle
Free E-Journal (出版社公開部分のみ)
Beschreibungen/Notizen
A rapid surge in the research on piezoelectric sensors is occurring with the arrival of the Internet of Things. Single-phase oxide piezoelectric materials with giant piezoelectric voltage coefficient (g, induced voltage under applied stress) and high Curie temperature (T
) are crucial towards providing desired performance for sensing, especially under harsh environmental conditions. Here, we report a grain-oriented (with 95% texture) modified PbTiO
ceramic that has a high T
(364 °C) and an extremely large g
(115 × 10
Vm N
) in comparison with other known single-phase oxide materials. Our results reveal that self-polarization due to grain orientation along the spontaneous polarization direction plays an important role in achieving large piezoelectric response in a domain motion-confined material. The phase field simulations confirm that the large piezoelectric voltage coefficient g
originates from maximized piezoelectric strain coefficient d
and minimized dielectric permittivity ɛ
in [001]-textured PbTiO
ceramics where domain wall motions are absent.
Sprache
Englisch
Identifikatoren
eISSN: 2041-1723
DOI: 10.1038/ncomms13089
Titel-ID: cdi_pubmed_primary_27725634
Format
–
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