Donor Doping Effects on the Ferroelectric and the Piezoelectric Properties of Pb-Free (Bi0.5Na0.5)TiO3 Ceramics

作者：Yeo Hong Goo; Sung Yeon Soo; Song Tae Kwon; Cho Jong Ho; Kim Myong Ho^*; Park Tae Gone

来源：Journal of the Korean Physical Society, 2009, 54(2): 896-900.

DOI：10.3938/jkps.54.896

• (Bi0.5Na0.5)TiO3
• Pb-free
• Donor doping
• Ferroelectric
• Piezoelectric

The effects of donors (D), such as Nb5+ and Ta5+, on the ferroelectric and the piezoelectric properties in (Bi0.5Na0.5)(Ti1-xDx)O-3 ceramics were studied. A solid solution of define BNT-doped Nb (x <= 1.0 mol%) and Ta (x <= 1.0 mol%) were analyzed by using X-ray diffraction. The observed grain size decreased with increasing doping content. As for the ferroelectric and piezoelectric properties, the coercive fields (E-C) and the mechanical quality factors (Q(m)) decreased with increasing doping while piezoelectric constant (d(33)) increased, which are similar to the results observed in donor-doped Pb(Zr,Ti)O-3 ceramics.

• 出版日期2009-2