Piezoelectric and ferroelectric properties of textured (Na0.50K0.47Li0.03)(Nb0.8Ta0.2)O3 ceramics by using template grain growth method

Fabrication of textured KNNT ceramics by reactive template grain growth using NN templates

“…However, after poling process, the intensity peak (002) is decreased, while (220) increased much. This result is a direct indication of ferroelectric domain growth along polarization direction during the poling process [7,37,38].…”

Pairing High Piezoelectric Coefficients, d33, with High Curie Temperature (TC) in Lead-Free (K,Na)NbO3

“…This relative permittivity for randomly oriented ceramics (7013) measured at T C is higher as compared to values reported in the literature for Li and Sb codoped ceramics (∼6500) 28 and 0.058LiNbO 3 −0.942[(Na 0.535 K 0.480 )-NbO 3 29 (∼3000−5000). Also, the dielectric permittivity of 13017 for the textured ceramics at T C exceeds the values reported for textured (Na 0.50 K 0.47 Li 0.03 ) (Nb 0.8 Ta 0.2 )O 3 (3000− 7000 at 100 kHz) with sintering aids 30 and is comparable to the values for Li content of 0.058 to 0.85 mol % and other doped KNN ceramics (10 000 to 15 000). 31,32 Other than the higher permittivity, the T → O/M transition temperature and T C are quite high as compared to the corresponding values in ceramics with higher amounts of Li and lower permittivity values.…”