TY - JOUR
T1 - Study on properties of tantalum-doped La2Ti2O7 ferroelectric ceramics
AU - Li, Chunchun
AU - Khaliq, Jibran
AU - Ning, Huanpo
AU - Wei, Xiaoyong
AU - Yan, Haixue
AU - Reece, Michael
PY - 2015/3/31
Y1 - 2015/3/31
N2 - A series of ceramics with a general formula, La2Ti2-xTaxO7, in which x = 0.05, 0.1, 0.2, and 0.3, were prepared by Spark Plasma Sintering (SPS). Effects of tantalum substitution for titanium on the structure, dielectric, and piezoelectric properties were studied. Results revealed that the structure changed gradually from 4-layer to 3-layer due to the higher valence of Ta. The solid solution limit of tantalum in La2Ti2O7 lattice was in the proximity of x = 0.2. The ferroelectric Curie temperature (Tc) decreased with increasing tantalum doping content. dc resistivity reached a maximum value at x = 0.2 with a value of ∼ 1.0 × 108Ω ⋅ cm at 600°C. The influence of texture on the piezoelectric properties of La2Ti2-xTaxO7 ceramics was also investigated. A maximum d33 value ∼2.1 pC/N was obtained at x = 0.2.
AB - A series of ceramics with a general formula, La2Ti2-xTaxO7, in which x = 0.05, 0.1, 0.2, and 0.3, were prepared by Spark Plasma Sintering (SPS). Effects of tantalum substitution for titanium on the structure, dielectric, and piezoelectric properties were studied. Results revealed that the structure changed gradually from 4-layer to 3-layer due to the higher valence of Ta. The solid solution limit of tantalum in La2Ti2O7 lattice was in the proximity of x = 0.2. The ferroelectric Curie temperature (Tc) decreased with increasing tantalum doping content. dc resistivity reached a maximum value at x = 0.2 with a value of ∼ 1.0 × 108Ω ⋅ cm at 600°C. The influence of texture on the piezoelectric properties of La2Ti2-xTaxO7 ceramics was also investigated. A maximum d33 value ∼2.1 pC/N was obtained at x = 0.2.
KW - Piezoelectric ceramics
KW - Curie temperature
KW - piezoelectric coefficient
U2 - 10.1142/S2010135X15500058
DO - 10.1142/S2010135X15500058
M3 - Article
VL - 05
SP - 1550005
JO - Journal of Advanced Dielectrics
JF - Journal of Advanced Dielectrics
SN - 2010-135X
IS - 01
ER -