TY - JOUR
T1 - Crystal structure and thermal annealing behaviors of high d 33 Aurivillius-phase ceramics Li0.04Ce0.04Na (0.46-x/2)Bi(4.46+x/2)Ti(4-x)Sc x O15 with the Sc3+/Bi3+ co-substitution
AU - Wang, Qian
AU - Fan, Huiqing
AU - Long, Changbai
AU - Huang, Liwei
PY - 2014/7
Y1 - 2014/7
N2 - Modified Aurivillius-type-structured piezoelectric ceramics, Li 0.04Ce0.04Na(0.46-x/2)Bi (4.46+x/2)Ti(4-x)Sc x O15 (LiCe-NBT-Sc-x, x = 0, 0.025, 0.075, 0.125, 0.15, 0.175) were synthesized by using conventional solid-state reaction process. Rietveld refinement for the x = 0.125 modified sample was carried out by using powder X-ray diffraction and LiCe-NBT-Sc-0.125 was confirmed to be a four-layer Aurivillius oxide with orthorhombic space group A2 1 am [a = 5.45814(7) Å, b = 5.43029(7) Å, c = 40.8547(4) Å and V = 1,210.902(26) Å3; Z = 4], at room temperature. The Sc3+/Bi 3+ substitution led to an increase in Curie temperatures (T c) and an enhancement in piezoelectric property, and the LiCe-NBT-Sc-0.125 ceramic with a T c of 675 °C had a high piezoelectric activity (d 33) of 32 pC/N. Variable thermal-annealing d 33 and resistivity (ρ) of the LiCe-NBT-Sc-0.125 ceramic were investigated; the d 33 of the O2 annealed sample reached up to 37 pC/N, and its resistivity was about 6.8 × 106 Ω cm at 575 °C and about 6.5 × 105 Ω cm at 650 °C.
AB - Modified Aurivillius-type-structured piezoelectric ceramics, Li 0.04Ce0.04Na(0.46-x/2)Bi (4.46+x/2)Ti(4-x)Sc x O15 (LiCe-NBT-Sc-x, x = 0, 0.025, 0.075, 0.125, 0.15, 0.175) were synthesized by using conventional solid-state reaction process. Rietveld refinement for the x = 0.125 modified sample was carried out by using powder X-ray diffraction and LiCe-NBT-Sc-0.125 was confirmed to be a four-layer Aurivillius oxide with orthorhombic space group A2 1 am [a = 5.45814(7) Å, b = 5.43029(7) Å, c = 40.8547(4) Å and V = 1,210.902(26) Å3; Z = 4], at room temperature. The Sc3+/Bi 3+ substitution led to an increase in Curie temperatures (T c) and an enhancement in piezoelectric property, and the LiCe-NBT-Sc-0.125 ceramic with a T c of 675 °C had a high piezoelectric activity (d 33) of 32 pC/N. Variable thermal-annealing d 33 and resistivity (ρ) of the LiCe-NBT-Sc-0.125 ceramic were investigated; the d 33 of the O2 annealed sample reached up to 37 pC/N, and its resistivity was about 6.8 × 106 Ω cm at 575 °C and about 6.5 × 105 Ω cm at 650 °C.
UR - https://www.scopus.com/pages/publications/84902546966
U2 - 10.1007/s10854-014-1967-2
DO - 10.1007/s10854-014-1967-2
M3 - 文章
AN - SCOPUS:84902546966
SN - 0957-4522
VL - 25
SP - 2961
EP - 2968
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - 7
ER -