Lead-free piezoceramics with the composition 0.7(Bi1-xNdx)FeO3-0.3BaTiO3+0.1xA0;wt% MnO2 (BNxF-BT) were prepared using a conventional solid state route. X-ray diffraction and temperature dependent permittivity measurements indicated a transition from a composition lying at a morphotropic phase boundary (MPB) to a pseudocubic phase as a function of Nd concentration. The highest maximum strain (SmaxxA0;∼xA0;0.2% at 60xA0;kV/cm) and effective piezoelectric coefficient (d33*xA0;=xA0;333 pm/V) were obtained at room temperature for the composition BN0.02F-BT. The decrease in remanent polarization (Pr) and Berlincourt d33 with increase in Nd concentration can be attributed to the coexistence of ferroelectric and relaxor phases. In-situ polarisation and strain measurements revealed an increase in Pr and d33* with temperature and a reduction in the coercive field EC. Presumably this behavior is due to a combination of thermally activated domain wall motion and lowering of the activation energy for a field induced relaxor-ferroelectric transition, as the Curie maximum is approached.