Sintering Characteristics in BaTiO3–Nb2O5–Co3O4 Ternary System: I, Electrical Properties and Microstructure

摘要: The influences of the Nb/Co ratio on electrical properties, densification behavior, and microstructural evolution were investigated ceramics in ternary system BaTiO3-Nb2O5-Co3O4. Temperature-stable dielectrics obtained using either a large amount Nb + Co or ratio. sintering characteristics properties studied for niobium-rich composition (Nb/Co = 3.00; Comp.N) cobalt-rich 1.67; Comp.C) with same 2 at.%. temperature characteristic dielectric constant was flat, irrespective firing temperature, Comp.N, whereas it dependent largely Comp.C. grains did not grow Comp.N but grew reaction Nb2O5 Co3O4 BaTiO3 yielded secondary phases: Ba6Ti17O40 phase barium-poor, titanium-rich, These phases formed liquid during firing. contained larger than It concluded that contributed little to