Synthesis of Bismuth Sodium Titanate Nanosized Powders by Solution/Sol–Gel Process

(Bi 1/2 Na 1/2 )TiO 3 (BNT) is a prominent candidate for a lead‐free piezoelectric material. In this study, BNT was synthesized using the solution/sol–gel method, in which a solution of Bi 2 O 3 and Na 2 CO 3 was dissolved in HNO 3 as starting materials. The solution then was mixed with ethylene glycol and titanium tetraisopropoxide. The obtained BNT powder was analyzed using FT‐IR, DTA‐TG, Raman spectroscopy, and high‐temperature XRD. Results showed that BNT crystallization occurred above 600°C. TEM investigation showed that 100–200 nm BNT particles were formed by heat‐treating the sol–gel‐derived BNT sol at 700°C for 6 h.