Structures and dielectric properties of La/Sn co-substituted Ba4Nd2Ti4Ta6O30 ceramics

The effects of La/Sn co-substitution at A and B sites of Ba4Nd2Ti4Ta6O30 ceramics were investigated. With La/Sn co-substitution, the temperature coefficient was significantly improved to near zero, at the same time, dielectric constant reduced and dielectric loss increased. In particular, remarkable annealing effects on dielectric properties were observed for these modified ceramics. After annealing, dielectric constant considerably increased, and temperature coefficient shifted to more negative. (C) 2005 Springer Science + Business Media, Inc.