Bismuth Sodium Titanate Lead-Free Piezoelectric Ceramics Fabricated by Using Novel Low-Temperature Solid-State Synthesis Method

Abstract

0.94Bi0.5Na0.5TiO3–0.06BaTiO3 (BNT-06) lead-free piezoelectric ceramic has been prepared by using a novel low-temperature solid-state synthesis method. The relationship between the calcine conditions and the electrical properties of the ceramics was systematically studied. The results show that a small amount of the activated assistant additives in the raw materials by using the novel low-temperature solid-state synthesis method decreases the calcine temperature of the BNT-06 powder from 900°C to 600°C. The BNT-06 ceramics prepared by using this powder presents good properties with ρ = 5.86 g/cm3, d 33 = 122 pC/N, k p = 0.24, Q m = 109, T C = 271.2°C, ϵ r = 1656, tan δ = 0.05, P r = 32.6 μC/cm2, and E c = 32.1 kV/cm respectively, which is comparable to that of the ceramics prepared by using ordinary solid-state method.