Electrical properties of lead-free Bi3.25La0.75(Ti1-xVx)3O12 ceramics

Vanadium-doped bismuth lanthanum titanate lead-free Bi3.25La0.75(Ti1-xVx)(3)O-12 (X = 0 similar to 0.10; BLTV-x). ceramics have been fabricated by using a solid-state reaction method. BLTV-0.01 ceramics exhibit a relatively high electromechanical coupling factor (k(t) = 20.2%) and high remnant polarization (P-r = 11.7 muC/cm(2)). Vanadium substitution for titanium-ion site can effectively enhance the resistivity by one order of magnitude(1.74 x 10(11) Omega(.)cm). A small amount of vanadium substitution for titanium site on BLT can significantly reduce the space charge density and the influence of domain pinning, which would be responsible for the improvement in the ferroelectricity and piezoelectricity.