Effect of PMN modification on the structural, microstructural, dielectric and ferroelectric properties of BT ceramics

Abstract

(1-x)BT-xPMN (x = 0, 0.02, 0.04, 0.06, 0.08 and x = 1) ceramic samples were synthesized by solid state reaction route. XRD study confirmed the formation of single perovskite phase of the BT-PMN system. Increase in density with drastic decrease in average grain size was observed with the increase of PMN content. High value of room temperature dielectric constant (ε_r) with low value of dielectric loss (tanδ) at room temperature and at 10 kHz frequency was obtained in x = 0.06 ceramic samples, however low temperature coefficient of capacitance (from RT to 100 °C) was obtained in x = 0.08 ceramic samples.

Keywords:

• Structure
• microstructure
• dielectric
• ferroelectric