Structural, dielectric and piezoelectric properties of aluminium doped PLZT ceramics prepared by sol–gel route

Impedance and electric modulus analysis of Sm-modified Pb(Zr0.55Ti0.45)1−x/4O3 ceramics

“…An extensive literature survey of pure and modified PZT ceramics [24][25][26][27][28][29][30][31] reveals that most of the reported works in this field are confined to La-modified PZT. It has shown tremendous applications in the solid-state electronic devices.…”

Structure and high dielectric permittivity of Li0.01M0.05Ni0.94O (M=V and W) ceramics

“…High dielectric constant materials were found in doping ferroelectric perovskite oxides near the Curie temperature (T c ) such as lead ziaconia-titanate (PZT), and ferroelectric-based oxides (PLZT) [1][2][3]. Recently, another perovskite-related material CaCu 3 Ti 4 O 12 (CCTO) [4] and nonperovskite materials Li and Ti codoped NiO based [5,6] and Li 0.01 Ta 0.05 Ni 0.94 O (LTNO) [7] ceramics have been reported for its unusual high dielectric constant of 10 4 -10 5 at room temperature, and ascribed to the origin of the high permittivity to extrinsic mechanisms such as the formation of boundary-layer capacitors.…”

Effect of Lanthanum Substitution on the Structural, dielectric, Ferroelectric and Piezoelectric Properties of Mechanically Activated PZt Electroceramics

“…3. The sol-gel process results in spherical particles whereas mechano-chemical processing results in elongated/flaky particles on account of the high mechanical impaction forces that result in mechanical deformation 6,20 . The average particle size calculated from the TEM image was found to be ~ 25 nm.…”

“…These best properties make them used widely in numerous devices such as different types of sensors, actuators, nano-positioners and transducers [1][2][3] . The amount of lanthanum substitution in the basic PZT system was selected on the basis of morphotropic phase boundary (MPB, a region of maximum piezoelectric and dielectric response) [3][4][5] , that depends on the Pb/La ratio [6][7] . At the vicinity of the MPB, PLZT ceramics show outstanding piezoelectric properties, which can be attributed to the unique structural feature of the coexistence of tetragonal and rhombohedral phases.…”