scholarly journals Local-scale structures across the morphotropic phase boundary in PbZr1−x Ti x O3

IUCrJ ◽  
2018 ◽  
Vol 5 (1) ◽  
pp. 73-81 ◽  
Author(s):  
Nan Zhang ◽  
Hiroko Yokota ◽  
A. M. Glazer ◽  
D. A. Keen ◽  
Semën Gorfman ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Lead Zirconate Titanate ◽  
Piezoelectric Materials ◽  
Function Analysis ◽  
Sudden Change ◽  
Functional Materials ◽  
Lead Zirconate ◽  
Coupling Factor ◽  
Structure Property

Lead zirconate titanate (PZT) is one of the most widely studied piezoelectric materials, mainly because of its `mysterious' relationship between the so-called morphotropic phase boundary (MPB) and its strong piezoelectric coupling factor. Using results from a pair distribution function analysis, this paper examines how the complex local structure in PZT affects the long-range average structure across the MPB. A monoclinic M C type structure is discovered in PZT. A first-order transformation between the monoclinic M A and M C components in both the average and local structures explains the sudden change in piezoelectric effect around these compositions. The role of polarization rotation in the enhancement of the piezoelectric properties is discussed with respect to the composition of PZT. The structure–property relationship that is revealed by this study explains the unique properties of PZT, and may be applicable in the design of new MPB-type functional materials.

Mechanical and Dielectrical Energy Dissipation Phenomena Study in Lead Zirconate Titanate Piezoelectric Materials

2014 ◽  
Vol 895 ◽  
pp. 274-279
Author(s):  
Abderrazak Bouzid ◽  
Gilbert Fantozzi
Keyword(s):  
Energy Dissipation ◽  
Internal Friction ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Lead Zirconate Titanate ◽  
Dielectric Spectroscopy ◽  
Piezoelectric Materials ◽  
Lead Zirconate ◽  
Low Frequencies ◽  
Zirconate Titanate

The aim of the present work is to show the analogy between mechanical and dielectric dissipation phenomena occurring in the PZT near the morphotropic phase boundary MPB-. Mechanical dissipations are investigated by internal friction mechanical losses and associated modulus-as function of temperature at medium and low frequencies. Dielectric dissipations are investigated by dielectric spectroscopy at medium frequencies.

Piezoelectric nanoindentation

2006 ◽  
Vol 21 (3) ◽  
pp. 552-556 ◽  
Author(s):  
Andrei Rar ◽  
G.M. Pharr ◽  
W.C. Oliver ◽  
E. Karapetian ◽  
Sergei V. Kalinin
Keyword(s):  
Lead Zirconate Titanate ◽  
Electromechanical Coupling ◽  
Piezoelectric Materials ◽  
Surface Displacement ◽  
Lead Zirconate ◽  
Ferroelectric Materials ◽  
Back Side ◽  
Structure Property ◽  
Load Dependence ◽  
Continuous Stiffness Measurement

Piezoelectric nanoindentation (PNI) has been developed to quantitatively address electromechanical coupling and pressure-induced dynamic phenomena in ferroelectric materials on the nanoscale. In PNI, an oscillating voltage is applied between the back side of the sample and the indenter tip, and the first harmonic of bias-induced surface displacement at the area of indenter contact is detected. PNI is implemented using a standard nanoindentation system equipped with a continuous stiffness measurement system. The piezoresponse of polycrystalline lead zirconate titanate (PZT) and BaTiO3 piezoceramics was studied during a standard nanoindentation experiment. For PZT, the response was found to be load independent, in agreement with theoretical predictions. In polycrystalline barium titanate, a load dependence of the piezoresponse was observed. The potential of piezoelectric nanoindentation for studies of phase transitions and local structure-property relations in piezoelectric materials is discussed.

scholarly journals Nature of the morphotropic phase boundary (MPB) in lead zirconate titanate (PZT)

2008 ◽  
Vol 64 (a1) ◽  
pp. C102-C102
Author(s):  
H. Fuess ◽  
M. Hinterstein ◽  
J. Kling ◽  
R. Schierholz ◽  
L.A. Schmitt ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Lead Zirconate Titanate ◽  
Lead Zirconate ◽  
Zirconate Titanate

scholarly journals STRUCTURE CHANGING OF SUBMICRON PZT FILMS WITH A FINE VARIATION OF THE COMPOSITION CORRESPONDING TO MORPHOTROPIC PHASE BOUNDARY

2021 ◽  
pp. 400-410
Author(s):  
Михаил Владимирович Старицын ◽  
Михаил Леонидович Федосеев ◽  
Евгений Юрьевич Каптелов ◽  
Станислав Викторович Сенкевич ◽  
Игорь Петрович Пронин
Keyword(s):  
Crystal Lattice ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Lead Zirconate Titanate ◽  
Lead Zirconate ◽  
Lattice Parameter ◽  
Crystal Lattice Parameter ◽  
Two Phase ◽  
Zirconate Titanate ◽  
Phase Boundary Composition

В работе обсуждаются возможности тонкого варьирования состава субмикронных сегнетоэлектрических пленок твердых растворов цирконата-титаната свинца, соответствующих области морфотропной фазовой границы. Варьирование состава осуществлялось путем изменения расстояния от мишени до подложки в диапазоне 30 - 70 мм в установке высокочастотного магнетронного распыления керамической мишени при осаждении пленок на «холодную» подложку платинированного кремния. Это позволило изменять состав осаждаемых пленок (т.е., элементное соотношение атомов Zr и Ti) в диапазоне 0 -1,5% при сохранении однофазности сформированных перовскитовых пленок в процессе отжига при 580°C. При этом пленки характеризовались элементной неоднородностью состава по толщине, достигающей нескольких процентов. Толщина тонких слоев цирконата-титаната свинца составляла 500 нм. Исследовались изменения микроструктуры и параметров кристаллической решетки. Изменения состава пленок сопровождались существенными изменениями характера сферолитовой микроструктуры и ростовой текстуры. Был обнаружен резкий скачок квазикубического параметра кристаллической решетки, причиной которого может являться фазовая трансформация сегнетоэлектрической фазы - от ромбоэдрической модификации к двухфазному состоянию, предположительно состоящему из моноклинной и тетрагональной модификаций. The paper discusses the possibility of a fine variation in the composition of submicron ferroelectric films of lead zirconate titanate solid solutions corresponding to a morphotropic phase boundary. Composition was varied by changing the distance from the target to the substrate in the range of 30 - 70 mm in an installation for radio-frequency magnetron sputtering of a ceramic target, in which films deposition occurred on a «cold» platinized silicon substrate. This made it possible to change the composition of the deposited films (i.e., the elemental ratio of Zr and Ti atoms) in the range of 0 - 1,5% while maintaining the single-phase perovskite films annealed at 580 °С. In this case, the films were characterized by elemental inhomogeneity of the composition over the thickness, reaching several percents. The thickness of thin lead zirconate titanate layers was 500 nm. Changes in the microstructure and crystal lattice parameters were studied. The change in the composition of the films was accompanied by significant changes in the nature of the spherulite microstructure and growth texture. A sharp jump in the quasi-cubic crystal lattice parameter was discovered, which may be caused by the phase transformation of the ferroelectric phase - from the rhombohedral modification to the two-phase state, presumably consisting of monoclinic and tetragonal modifications.

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