Dielectric and mechanical properties of PZN-PFN-BZN ternary system

The Ferroelectric relaxor ternary system 0.5PZN-(0.5 - x)PFN-xBZN was prepared using the columbite precursor method. The stability of the perovskite phase was studied as a function of BZN content in the system. It was observed that BZN is a good stabilizer of perovskite phase because of the high value of electronegativity difference between its cation and anion. It has also been observed that addition of BZN increases the dielectric maxima peak value and decrease the Curie temperature of the ceramics. The ternary composition 0.5PZN-0.425PFN-0.075BZN has been identified for MLCs applications. It has a T-c of around room temperature with a peak dielectric constant congruent to6400 and tandelta similar to 0.05. The mechanical properties of relaxor materials have also been studied and reported. (C) 2002 Kluwer Academic Publishers.