Details

Autor(en) / Beteiligte

• Yan, Yongke
• Zhou, Jie E
• Maurya, Deepam
• Wang, Yu U
• Priya, Shashank

Titel

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

Link zum Volltext

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.