Dielectric and piezoelectric properties of lanthanum-modified 0.55Pb(Sc1/2Ta1/2)O3–0.45PbTiO3 ceramics

Effect of lanthanum on the piezoelectric properties of lead zirconate titanate–lead zinc niobate ceramics

“…The formation of pyrochlore phases and the resultant reduction in the piezoelectric properties, resulting from too much La being added, have also been observed in other systems such as PMN-PT, PZNBaTiO 3 -PbTiO 3 , and Pb(Sc 1/2 Ta 1/2 )O 3 -PbTiO 3 . [17][18][19] In 0.65PMN-0.35PT and 0.7PZN-0.15BaTiO 3 -0.15PbTiO 3 systems, pyrochlore phases appeared when more than 5 mol% La was added. 17,18 On the other hand, in 0.55Pb(Sc 1/2 Ta 1/2 )O 3 -0.45PbTiO 3 system, the pyrochlore phase was formed with the addition of only 2 mol% La.…”

“…17,18 On the other hand, in 0.55Pb(Sc 1/2 Ta 1/2 )O 3 -0.45PbTiO 3 system, the pyrochlore phase was formed with the addition of only 2 mol% La. 19 The addition of La also affected the microstructure of the specimens. Scanning electron microscopy images of the fracture surfaces for the unmodified and Lamodified 0.82PZT-0.18PZN specimens are shown in Fig.…”

Performance Optimization of Pb0.97La0.03Sc0.45Ta0.45Ti0.1O3 Ceramics by Annealing Process

“…Ferroelectric materials have recently attracted a great deal of attention due to their growing scientific interests and technological abilities to engineer/design practical devices including energy storage devices, ultrasound transducers, acoustic sensing, modulators, [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ], etc. Among others, Pb-based Pb(Sc 0.5 Ta 0.5 )O 3 -PbTiO 3 (PST-PT) ceramics as relaxor ferroelectrics have exhibited many unique properties such as high dielectric permittivity over a wide range of temperatures, large electrostrictive strain and ultrahigh piezoelectric coefficients [ 10 , 11 , 12 , 13 , 14 ].…”

“…This destroys the transition to a long-range ferroelectric state and forms a new polar cluster so that the ceramics can attain greater energy storage density and efficiency [ 24 , 26 , 27 , 28 , 29 , 30 ]. Earlier, by doping La into 0.55Pb(Sc 0.5 Ta 0.5 )O 3 -0.45PbTiO 3 ceramics, Liu et al [ 6 ] studied the major changes in the piezoelectric properties. Maier et al [ 31 ] have also improved the energy storage density by incorporating a small amount of La to affect the structural changes in the ferroelectrics.…”

The interface density dependence of the electrical properties of 0.9Pb(Sc 0.5 Ta 0.5 )O 3 –0.1PbTiO 3 /0.55Pb(Sc 0.5 Ta 0.5 )O 3 –0.45PbTiO

“…[10,11] Mixing PST with lead titanate (PbTiO 3 , PT), e.g., (1 − x) Pb(Sc 0.5 Ta 0.5 )O 3 -xPbTiO 3 , PSTTx, is an effective way to raise the T C , and then the high pyroelectric property could be retained. [6,12] Another attractive material is multilayer thin film. As is well known, the coupling and interaction between the layers in a multilayer structure can strongly affect the film's electrical properties, [13][14][15] and an appropriate combination of the layers with different compositions can either improve the functional properties or create one or more novel properties.…”