Details

Autor(en) / Beteiligte

• Liu, Zhen
• Ren, Weijun
• Nie, Hengchang
• Peng, Ping
• Liu, Yun
• Dong, Xianlin
• Cao, Fei
• Wang, Genshui

Titel

Pressure driven depolarization behavior of Bi0.5Na0.5TiO3 based lead-free ceramics

Ist Teil von

• Applied physics letters, 2017-05, Vol.110 (21)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2017

Quelle

AIP Scitation Journals Complete

Beschreibungen/Notizen

• Pressure driven depolarization behavior has been widely investigated for its scientific significance and practical applications. However, previous related studies were all based on lead-containing ferroelectric (FE) materials leading to detrimental environmental concerns. In the present work, we report the pressure driven depolarization behavior in Bi-based lead-free 0.97[(1-x)Bi0.5Na0.5TiO3-xBiAlO3)]-0.03K0.5Na0.5NbO3 (BNT-x) ceramics. Particularly, with increasing hydrostatic pressure from 0 MPa to 495 MPa, the remanent polarization of BNT-0.04 decreases from 30.7 μC/cm2 to 8.2 μC/cm2, reducing ∼73% of its initial value. The observed depolarization phenomenon is associated with the pressure induced polar FE-nonpolar relaxor phase transition. The results reveal BNT based ceramics as promising lead free candidates for mechanical-electrical energy conversion applications based on the pressure driven depolarization behavior.