Bismuth zinc niobate: BZN-BT, a new lead-free BaTiO3-based ferroelectric relaxor?

Abstract

The novel lead-free ferroelectric relaxor system x(Bi(Zn2/3 Nb1/3)O3)(1 − x)BaTiO3 (xBZN(1 − x)BT) has received interest as a high-capacity relaxor dielectric material. Small quantities ( 4.0% showed the onset of dielectric relaxation alongside a drop in polarization coincident with a drop in the tetragonal cT/aT ratio and the onset of the cubic phase at 295 K. Peak piezoelectric, dielectric and polarization values occurred over the range 3.8% 5.0%, showing a transition from lossy relaxor dielectric to low-loss relaxor dielectric at x > 10.0%.

Keywords

• relaxors
• lead-free ferroelectrics
• crystallography
• piezoelectrics
• dielectrics