Effect of lanthanum, neodymium on piezoelectric, dielectric and ferroelectric properties of PZT

Abstract

Abstract:The effect of La 3+ and Nd 3+ on piezoelectric, dielectric and ferroelectric properties of PZT (Pb(Zr 0.53 Ti 0.47 )O 3 ) was studied. The powders were prepared by "wet-chemical" route followed by calcination at 800 ℃ for 4 h. XRD analysis of the calcined powders confirms the tetragonal phase in the undoped PZT, which gradually decreases with the dopant concentration and the appearance of rhombohedral phase simultaneously. SEM study of sintered pellets reveals the decrease in grain size with the increase in dopant concentration beyond 0.02 mol Nd 3+ and 0.03 mol La 3+ respectively. The piezoelectric constant (d 33 ) and dielectric properties were maximum for 0.02 mol Nd 3+ and 0.03 mol La 3+ respectively. The remnant polarization of La 3+ -doped sample was higher than Nd 3+ -doped sample, and the sample with combined dopants shows intermediate remnant polarization (P r ). Based on the above study, it is concluded that La 3+ is more effective than Nd 3+ , including in a mixture of La 3+ and Nd 3+ dopants.

Piezoelectric properties of PZT by an ethylene glycol-based chemical solution synthesis

“…A small Pt(200) peak is present due to the top electrode, which is not perfectly (111) oriented. The preferential orientation of the PNZT film can be quantified by normalizing the integrated peak intensities with the intensities of the X-ray diffraction patterns of a powdered sample using the following expression [22]: 155 Undoped Wet chemical [30] 300 Undoped Wet chemical [31] 569 La Sol-gel [32] 269 Nd Sol-gel [32] 325 La Wet chemical [33] 236 BiFeO 3 /CuO/BaCu 0.5 W 0.5 O 3 Solid-state [34] 338 La/Nb Solid-state [35] 520 Sr/Nb Solid-state [36] 255 Nb Solid-state [37] Fig. 7 Plan-view SEM image of a nine-layer PNZT thin-film stack with a PbO overcoat.…”

Enhanced Ferroelectric, Dielectric Properties of Fe-Doped PMN-PT Thin Films

“…The (111) preferred orientation of the PMN-PT and PMN-PT-2Fe thin films is attributed to the template effect of the Pt(111) substrate [23]. However, continuing to increase the doping concentration will impact the preheat decomposition of the sol, which will change the crystal orientation [24]. When the doping concentration is up to 4%, the preferred orientation transfer from (111) to (110), indicating that effect on the preheat decomposition surpasses the template effect.…”

Studies of dielectric and piezoelectric properties of PbTi0.8−x Te0.2GdxO3 nano ceramics prepared by high energy ball milling

“…This rise may be attributed to completion of solid state reaction in green powder as well as change in lattice site. [21][22][23][24][25][26][27][28][29] DSC micrograph noticeably indicated formation of required PT phase during milling of powder by HEBM itself. [30][31][32] In TGA curve, almost no weight loss was observed between 510 ○ C to 880 ○ C. This helped in selecting the calcinations temperature around 510 ○ C. 33,34 Sharp declined is seen in TGA curve after 880 ○ C due to fast decomposition of lead present in material at high temperature.…”