Dielectric and ferroelectric properties of modified-BaTiO₃ lead-free ceramics prepared by solid solution method

Abstract

Barium titanate (BaTiO₃) has been recognized as an important perovskite ceramic since its discovery due to its excellent dielectric, ferroelectric and piezoelectric properties. Its modifications have been studied in many perspectives depending on applications. In this review, the basic principles of BaTiO₃ were described, then followed by the explanation on the recent modifications of BaTiO₃ to improve the dielectric properties. Relaxor ferroelectric behavior of BaTiO₃ was revealed by combining BaTiO₃ with other Bi-based perovskites. These modified- BaTiO₃ opened the opportunities for emerging energy storage applications. Next, the modifications for ferroelectric and ferromagnetic aspects were further discussed. BaTiO₃ can also be doped by other ions to enhance such properties. Solid solution between Bi-based perovskites such as BiFeO₃, (Bi_0.5K_0.5)TiO₃, or Bi(Zn_0.5Ti_0.5)O₃ and BaTiO₃ can also improve ferroelectric and ferromagnetic properties. Therefore, these details of recent BaTiO₃ modifications may provide guidance for the next BaTiO₃ investigations in order to gain the maximum benefits from BaTiO₃.

Keywords:

• Dielectric
• ferroelectric
• lead-free ferroelectric
• modified-BaTiO₃
• ceramics
• solid solution