Structural and electrical properties investigations of Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3-Pb(Fe_(1/2)Nb_(1/2)O_3 ceramics

摘要

The structural, dielectric, ferroelectric and piezoelectric properties of 0.59Pb(Mg_(1/3)Nb_(2/3))O_3-0.31PbTiO_3-0.10Pb(Fe_(1/2)Nb_(1/2)O_3 (0.59PM-0.31PT-0.10PFN) ceramic have been investigated. The investigations show that its phase structure is near the morpho-tropic phase boundary, and excellent electrical properties are obtained with this composition. Compared with PMN-PT, studies also show that 10 percent PFN substitution results in (i) a decreased sintered temperature; (ii) an increased Curie temperature and peculiar relaxation behavior; and (iii) a low dielectric loss, which indicates that the novel ternary system deserves further exploration.