Lead-free rare earth-modified (K_(0.44)Na_(0.52)Li_(0.04))(Nb_(0.86)Ta_(0.1)Sb_(0.04)O_3 ceramics: phase structure, electrical and photoluminescence properties

摘要

AbstractRare-earth element ions Pr3+and Nd3+-doped (K0.44Na0.52Li0.04)(Nb0.86Ta0.1Sb0.04)O3(KNLNTS-xRE) ceramics were prepared by traditional solid-state sintering method. The phase structure, microstructure, electrical and photoluminescence properties of the samples were investigated. Results showed that both Pr3+and Nd3+modified ceramics can form the polymorphic phase transition at room temperature atx = 0.3 wt% with the optimal properties (Pr= 26.1 μC/cm2,EC= 15.2 kV/cm,d33 = 196 pC/N,d33* = 390 pm/V for KNLNTS-0.3Pr, andPr= 25 μC/cm2,EC= 13.8 kV/cmd33 = 228 pC/N,d33* = 350 pm/V for KNLNTS-0.3Nd). In addition, a large strain of 0.12 and 0.10% at a driving field of 30 kV/cm for KNLNTS-0.3Pr and KNLNTS-0.3Nd were obtained, respectively. Besides the excellent strain properties, the KNLNTS-0.3RE samples exhibited a strong photoluminescence: a green emission (528 nm), an orange emission (602 nm), and a red emission (650 nm) for KNLNTS-0.3Pr; a strong near-infrared emission (909 and 1058 nm) for KNLNTS-0.3Nd. These results suggest that the KNLNTS-0.3RE system should be a promising lead-free material with multifunctional properties and significant technological potential in novel multifunctional devices.