Giant electrostrictive strain in (Bi 0.5 Na 0.5 )TiO 3 –NaNbO 3 lead-free relaxor antiferroelectrics featuring temperature and frequency stability

A new lead-free 0.76BNT-0.24NN relaxor AFE ceramic exhibits linear P – E , S – P 2 and S – E 2 responses and giant purely-electrostrictive strains of ∼0.20% within ˂10% in a wide temperature range owing to the existence of anti-polar nanoregions (APNRs).