Synthesis and characterization of bnt ferroelectric ceramic by auto-combustion technique

Abstract

(Bi0.5Na0.5) TiO3 was prepared by auto-combustion method, taking urea as a fuel with varying concentrations in different calcined temperature. XRD and SEM analysis was carried out to confirm the single phase and growth of the particles. At 25 wt. % of urea, pure phase of BNT
was confirmed at 7000C butat 50wt. %, well intensified peak appeared with a little un-identified peak. Calcine temperature was reduced marginally in this fuel additive method.Powder prepared at 700oC was chosen for further study.Dielectric measurement of sintered pellet at 11000Cof
durations 2hr,3hr,4hr were taken and analyzed as well as hysteresis measurement was carried out.Improved dielectric and ferroelectric property was seen of the pellet sintered at 3hr duration due to well grain growth.