Influence of Sb doping on structure, domain size, and piezoelectric properties of Pb0.99Nb0.02[(Sn0.30Zr0.70)(0.52)Ti-0.48](0.98)O-3 ceramics

摘要

Effects of Sb doping on microstructure and electrical properties of Pb0.99Nb0.02[(Sn0.30Zr0.70)(0.52)Ti-0.48](0.98)O-3 (PNSZT) ceramics have been systematically investigated. Experimental results reveal that Sb cations can be successfully incorporated into PNSZT lattice by substituting B-site cations, which leads to the formation of Pb vacancies, enhances the relaxation of Sb-doped PNSZT ceramics and decreases domain size. Hence, piezoelectric response of Sb-doped PNSZT ceramics is superior to pure PNSZT ceramics. Moreover, phase-field simulation is employed to verify successful doping of Sb ions and formation of polar nano-domains. Owing to Sb doping, high piezoelectric properties, such as d(33 )= 530 pC/N and k(p) = 0.63, have been achieved at Sb2O5 content of 0.8 wt %. Furthermore, detailed mechanism of improved piezoelectric response due to Sb doping is proposed. Current study presents novel route to enhance piezoelectric properties of PNSZT ceramics, which may be helpful to improve properties of similar materials in the future.