Acoustic emission study of domain wall motion and phase transition in (1-x-y)Bi0.5Na0.5TiO3-xBaTiO(3)-yK(0.5)Na(0.5)NbO(3) lead-free piezoceramics

作者：Dul'kin E; Mojaev E; Roth M; Jo Wook; Granzow T^*

来源：Scripta Materialia, 2009, 60(4): 251-253.

DOI：10.1016/j.scriptamat.2008.10.014

• Lead-free piezoelectrics
• Acoustic emission
• Antiferroelectric phase transition
• Ferroelectric hysteresis

The ferroelectric strain hysteresis and acoustic emissions of lead-free (1 - x - y)Bi0.5Na0.5TiO3-xBaTiO(3)-yK(0.5)Na(0.5)NbO(3) ceramics were investigated at room temperature. The field-induced antiferroelectric <-> ferroelectric phase transition as well as the ferroelectric coercive field were successfully detected. Although the strain was largest for x = 0.06 and y = 0.02. this composition showed the lowest acoustic emission signals, making it an interesting material ultrasonic transducer applications.

• 出版日期2009-2