Polymorphism of BaTiO3 Acceptor Doped with Mn3+, Fe3+, and Ti3+

Abstract

The effect of Mn doping on the cubic to hexagonal phase transition temperature in BaTiO3 has been determined by quenching samples with different Mn contents from a range of temperatures. Under conditions of equilibrating samples in air over the range 1000°-1400°C, cubic solid solutions BaTi1-xMnxO3-d form over the range 0≤x≤0.015(5), whereas hexagonal solid solutions form for x ≥ 0.02, depending on the temperature. The results are compared with those on doping BaTiO3 with Fe3+ and observations made concerning acceptor doping with Ti3+. © 2008 The American Ceramic Society.