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

• Published in: Ferroelectrics 2010-01, Vol.404 (1), p.50-56
• Main Authors: Wu, Wen-Juan, Xiao, Ding-Quan, Sun, Yong, Zhu, Jian-Guo, Li, Jing, He, Zi-Jun, Zhang, Bin, Huang, Xiao-Lei
• Format: Article
• Language: English
• Subjects: 0.06BaTiO; 0.5; 0.94Bi; Ceramics; Chemical reactions; Chemical synthesis; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric loss and relaxation; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Domain structure; hysteresis; Electric properties; Exact sciences and technology; Ferroelectricity and antiferroelectricity; Ferroelectrics; High temperature; Lead-free piezoelectric ceramics; low-temperature solid-state synthesis method; Permittivity (dielectric function); Physics; piezoelectric properties; Piezoelectricity and electromechanical effects; TiO
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150193.2010.482012

0.94Bi 0.5 Na 0.5 TiO 3 -0.06BaTiO 3 (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/cm 3 , 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/cm 2 , and E c = 32.1 kV/cm respectively, which is comparable to that of the ceramics prepared by using ordinary solid-state method.