In this work, bismuth sodium titanate (Bi0.5Na0.5)TiO3 (BNT) and praseodymium (Pr)-doped BNT were
successfully produced using the soft combustion technique. The effects of Pr doping on stoichiometry,
microstructure, density and dielectric properties were studied. Pure Pr-doped BNT was obtained in all
samples containing 5, 10 and 20 mol% Pr after calcination at 800 ◦C for 3 h. The produced powders were
then pressed into pellets and sintered at 1100 ◦C for 3 h. The very similar ionic radii of Pr3+ with Bi3+
and Na+ made it possible to substitute both Bi and Na. The crystallite size and grain size decreased
with increasing Pr amount because Pr acted as grain growth inhibitor, both for calcined powders and
for sintered pellets. Maximum density was obtained in 5 mol% Pr-doped BNT, beyond which density
decreased. The maximum dielectric constant of 756 was obtained in 5 mol% Pr-doped BNT and decreased
at higher levels of Pr doping. Pr doped into BNT also caused a decrease in dielectric loss.