TY - JOUR
T1 - Microstructure and dielectric relaxor behavior of Ba(Zr 0.2Ti 0.8)O 3-(Ba 0.7Ca 0.3)TiO 3-BaBi 4Ti 4O 15 ceramics by tape casting
AU - Xu, Bei
AU - Gao, Feng
AU - Cao, Xiao
AU - Liu, Liangliang
AU - Hu, Guoxin
PY - 2012/10
Y1 - 2012/10
N2 - Plate-like BaBi 4Ti 4O 15 powders were used to fabricate 0.952[Ba(Zr 0.2Ti 0.8)O 3-(Ba 0.7Ca 0.3)TiO 3]-0.048 BaBi 4Ti 4O 15(abbr. BZCT-BBT) ceramics by tape casting. The microstructure and dielectric relaxor behaviors of BZCT-BBT ceramics were investigated. BZCT-BBT ceramics can be sintered well at 1,100 °C and mainly consisted of tetragonal perovskite phase and BaBi 4Ti 4O 15 (abbr. BBT) phase. The lattice constants decrease as the sintering temperature increases due to substitution of Bi 3+ for the A-site atoms of the perovskite structure. There is no obvious difference between the structure in the perpendicular and parallel directions, however, an evident difference of dielectric properties in the two directions is observed. Comparing with Ba(Zr 0.2Ti 0.8)O 3-(Ba 0.7Ca 0.3)-TiO 3(abbr. BZCT) ceramics, BZCT-BBT ceramics show obvious relaxor characteristics which are evidenced by the degree of diffuseness γ calculated using the modified Curie-Weiss law. Meanwhile, the addition of BBT decreases T m, which results from the decrease of grain size. The reduction of ε m is mainly caused by phase structure deviation from the coexisting rhombohedral and tetragonal structure to single tetragonal.
AB - Plate-like BaBi 4Ti 4O 15 powders were used to fabricate 0.952[Ba(Zr 0.2Ti 0.8)O 3-(Ba 0.7Ca 0.3)TiO 3]-0.048 BaBi 4Ti 4O 15(abbr. BZCT-BBT) ceramics by tape casting. The microstructure and dielectric relaxor behaviors of BZCT-BBT ceramics were investigated. BZCT-BBT ceramics can be sintered well at 1,100 °C and mainly consisted of tetragonal perovskite phase and BaBi 4Ti 4O 15 (abbr. BBT) phase. The lattice constants decrease as the sintering temperature increases due to substitution of Bi 3+ for the A-site atoms of the perovskite structure. There is no obvious difference between the structure in the perpendicular and parallel directions, however, an evident difference of dielectric properties in the two directions is observed. Comparing with Ba(Zr 0.2Ti 0.8)O 3-(Ba 0.7Ca 0.3)-TiO 3(abbr. BZCT) ceramics, BZCT-BBT ceramics show obvious relaxor characteristics which are evidenced by the degree of diffuseness γ calculated using the modified Curie-Weiss law. Meanwhile, the addition of BBT decreases T m, which results from the decrease of grain size. The reduction of ε m is mainly caused by phase structure deviation from the coexisting rhombohedral and tetragonal structure to single tetragonal.
UR - http://www.scopus.com/inward/record.url?scp=84867258756&partnerID=8YFLogxK
U2 - 10.1007/s10854-012-0667-z
DO - 10.1007/s10854-012-0667-z
M3 - 文章
AN - SCOPUS:84867258756
SN - 0957-4522
VL - 23
SP - 1809
EP - 1816
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - 10
ER -