Abstract
BiAlO3 is a perovskite ferroelectric with a high Curie temperature above 520°C. However, it is difficult to prepare pure perovskite phase by the conventional method. In this experiment, BaTiO3 has been selected as host to incorporate BiAlO3, and the nominal binary system of (1-x)BaTiO3-xBiAlO3 has been investigated with regard to its Curie temperature (T c) and dielectric relax behaviors. It was found that the pure perovskite phase can be retained below x = 0.08. However, the value of T c in the system doesn’t follow the normal Vegard’s law, on the contrary, shows the decreasing trend with the increase of x. According to the compared experiments about Bi3+ and Al3+ doping in BaTiO3, it can be safely concluded that the combined substitution of Bi3+ and Al3+ played the dominant role to decrease the T c and increase the relaxor behavior in (1-x)BaTiO3-xBiAlO3 system.
Published Version
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