Enhanced Piezoelectric Propertiesof Sodium Bismuth Titanatern(na_(0.5)bi_(4.5)ti_4o_(15)) Ceramics With B-site Cobalt Modification

摘要

The piezoelectric properties of the cobalt-modified sodium bismuth titanate (Na_(0.5)Bi_(4.5)Ti_4O_(15), NBT) piezoelectric ceramics were investigated. The piezoelectric properties of NBT ceramics were significantly enhanced by cobalt modification. The Curie temperature T_c and piezoelectric constant d_(33) for the 0.3 wt% cobalt-modified NBT ceramics (NBT-C3) werernfound to be 663 ℃ and 30 pC/N, respectively. Thermal annealing studies presented that the cobalt-modified NBT ceramics possess stable piezoelectric properties, demonstrating that the cobalt-modified NBT-based ceramics are promising candidates for high temperature piezoelectric applications.