Comparison of PZT ceramics based on the frequency dependence of conductance and a grain boundary - domain walls model

1992 ◽  
Vol 127 (1) ◽  
pp. 155-160 ◽  
Author(s):  
Roland Briot ◽  
Paul Gonnard ◽  
Michel Troccaz
Keyword(s):  
Grain Boundary ◽  
Frequency Dependence ◽  
Domain Walls ◽  
Pzt Ceramics

Influence of Domain Structure on Magnetoresistance in Perovskite Manganite Grain Boundary Junctions

2001 ◽  
Vol 674 ◽  
Author(s):  
Robert Gunnarsson ◽  
Anatoli Kadigrobov ◽  
Zdravko Ivanov
Keyword(s):  
Grain Boundary ◽  
Temperature Dependence ◽  
Focused Ion Beam ◽  
Domain Walls ◽  
Ion Beam ◽  
Perovskite Manganite ◽  
Current Voltage ◽  
Single Grain ◽  
Current Voltage Characteristics ◽  
The Impact

ABSTRACTWe have been able to deduce a temperature dependence of the built-in potential in La2/3Sr1/3MnO3 grain boundary junctions. This has been performed by trimming a single grain boundary down to 1μm width with a focused ion-beam. We can thereby see the impact of single domain walls on the magnetoresistance and the current-voltage characteristics. We have also demonstrated the effect of averaging as we increased the number of junctions.

Microstructure and Mechanical Properties of PMS-PZT Ceramics with Silica Additives

2005 ◽  
Vol 475-479 ◽  
pp. 1145-1148 ◽  
Author(s):  
Zhi Gang Zhu ◽  
Bao Shan Li ◽  
Guo Rong Li ◽  
Xiang Ping Jiang ◽  
Qing Rui Yin
Keyword(s):  
Mechanical Properties ◽  
Grain Boundary ◽  
Lead Zirconate Titanate ◽  
Perovskite Phase ◽  
Secondary Phase ◽  
Lead Zirconate ◽  
Pzt Ceramics ◽  
Superior Mechanical Properties ◽  
Power Application ◽  
Titanate Ceramics

The use of lead zirconate titanate ceramics for high power application must have superior mechanical properties, the composition Pb0.98Sr0.02(Mn1/3Sb2/3)0.05Zro.48Ti0.47O3 + x wt% SiO2 (x = 0-1.0) have been studied for this purpose. The microstructures were observed to study the improvement of mechanical properties by SEM and TEM. The nano-scale secondary phase of SiO2 and PbSiO3 were observed on the grain boundary and the twinned ZrO2 was found surrounded by PMS-PZT perovskite phase. The mechanism to the occurrence of twinned ZrO2 and its content increased with increasing Si concentration are discussed in the paper. The occurrence of the nonferroelectric phase such as ZrO2, SiO2 and PbSiO3 on the grain boundary should be the main reason for great improvement of fracture strength.

Ferroelectric domains in coarse-grained lead zirconate titanate ceramics characterized by scanning force microscopy

2003 ◽  
Vol 18 (8) ◽  
pp. 1777-1786 ◽  
Author(s):  
J. Muñoz-Saldaña ◽  
M. J. Hoffmann ◽  
G. A. Schneider
Keyword(s):  
Lead Zirconate Titanate ◽  
Domain Walls ◽  
Scanning Force Microscopy ◽  
Lead Zirconate ◽  
Piezoelectric Response ◽  
Pzt Ceramics ◽  
Force Microscopy ◽  
Zirconate Titanate ◽  
Domain Configuration ◽  
Scanning Force

Ferroelectric domain configurations in silver- and lanthanum-doped lead zirconate titanate (PZT) ceramics were characterized by scanning force microscopy using contact as well as piezoelectric response force [i.e., piezoelectric force microscopy (PFM)] modes. Coarse crystallites of hard and soft PZT ceramics (12 μm in Ag-PZT and 30 μm in La-PZT average grain size, respectively) with surface oriented in the {001} planes were chosen to characterize the domain configuration. Results show the conventional right-angled domain structures, which correspond to the {110} twin-related 90° and 180° domains of homogeneous width from 50 to 150 nm. The ability of PFM to image the orientation of pure in-plane arrays of domains (containing 90°-aa- and 180°-aa-types of domain boundaries) is highlighted, and a more detailed notation for in-plane domains is proposed. In addition to such periodical domain arrays, other ordered domains were found, having a misfit of 26° with respect to the{110} domain walls and the {100} surface. This array of domain walls could not be predicted with a geometrical analysis of the intersection of domain walls at the surface according to the conventional spatial array of {110} crystallographic planes. It could be explained only with {210} planes being the domain walls. The reason for this unconventional domain configuration is explained with the clamped conditions of the investigated crystallites in the polycrystalline material.

Grain Boundary Passivation and Analysis for Solar Cell Applications

1981 ◽  
Vol 5 ◽  
Author(s):  
V. J. Rao ◽  
W. A. Anderson ◽  
F. Kai
Keyword(s):  
Solar Cell ◽  
Grain Boundary ◽  
Frequency Dependence ◽  
Grain Boundaries ◽  
Interface States ◽  
Boundary Effects ◽  
Ir Studies ◽  
Grain Boundary Effects

ABSTRACTGrain boundaries in Wacker poly-Si are shown to contribute mid-gap interface states, a greater frequency dependence in a.c. conductance, and lesser frequency dependence in capacitance. H-passivation was shown to be effective in reducing grain boundary effects as evidenced by 4-point probe resistance and IR studies.

Effect of Lead Content and B-Site Substitutions on Dielectric and Piezoelectric Properties of PZT Ceramics

2006 ◽  
Vol 514-516 ◽  
pp. 188-192
Author(s):  
Elena Dimitriu ◽  
Floriana Craciun ◽  
Marin Cernea ◽  
Rodica Ramer
Keyword(s):  
Room Temperature ◽  
Domain Walls ◽  
Piezoelectric Properties ◽  
Narrow Range ◽  
Sintering Temperature ◽  
Xrd Analysis ◽  
Lead Content ◽  
Lithium Ions ◽  
Pzt Ceramics ◽  
Dielectric And Piezoelectric Properties

The behaviour of the dielectric and piezoelectric properties of doped PZT ceramics, with variable lead content, has been investigated from –50oC to room temperature. The PZT materials were prepared by the oxide technique and samples were sintered as pellets, at various temperatures. Niobium and lithium ions have been substituted for Ti4+, Zr4+ in the PZT matrix, and a small amount of Bi2O3 was added to cause A-position vacancies. The lead content in the four materials prepared varies in a narrow range, from 0.97 to 1.029 lead atoms, while the concentration of all other components are maintained constant. The microstructure of samples, evaluated by SEM technique and XRD analysis evidenced the presence of the tetragonal phase characteristic for the PZT 52/48. The dielectric and piezoelectric c onstants measured on poled samples depends on the sintering temperature, defects and domain walls, lead content.

Formation and Growth of Antiphase Domains During Recrystallization of Cold-Rolled Cu3Au

1994 ◽  
Vol 364 ◽  
Author(s):  
Rui Yang ◽  
Robert W. Cahn
Keyword(s):  
Grain Boundary ◽  
Driving Force ◽  
Domain Walls ◽  
Early Stage ◽  
Domain Size ◽  
Boundary Motion ◽  
Domain Formation ◽  
Cold Rolled ◽  
Antiphase Domains ◽  
Grain Boundary Motion

AbstractAn experimental study by TEM was made of the morphology of the antiphase domains formed when heavily rolled Q13AU is annealed at a temperature slightly below the critical temperature for ordering, Tc. Domains are formed at the advancing grain boundary with extremely small size and grow as recrystallization proceeds. From an early stage, domain walls show a preference for (100) orientation. The key question is raised whether domain formation during recrystallization entails the presence of a disordered zone at a moving grain boundary near Tc, and the conclusion is that such a zone is probably present. A provisional theory is constructed for the genesis of domains during recrystallization, taking into account the dragging force which newly formed domains exert on a moving grain boundary thereby diminishing the effective driving force for grain boundary motion, and a critical domain size is estimated which should completely inhibit grain-boundary motion. The intriguing fact that no domains at all are formed during the recrystallization of strongly ordered intermetallics such as Ni3Al is briefly discussed and a reason is proposed.

FREQUENCY DEPENDENCE OF THE GRAIN-BOUNDARY CONDUCTIVITY IN (Y2O3, CaO)-STABILIZED ZrO2

2011 ◽  
Vol 25 (01) ◽  
pp. 131-142 ◽  
Author(s):  
TONGWEI LI ◽  
WEIWEI JU ◽  
JINCANG ZHANG
Keyword(s):  
Activation Energy ◽  
Grain Boundary ◽  
Frequency Dependence ◽  
Power Law ◽  
Boundary Effect ◽  
Complex Impedance ◽  
Impedance Method ◽  
Boundary Conductivity ◽  
Grain Boundary Effect ◽  
Power Law Parameters

Five samples of mixed Y 2 O 3/ CaO doped ZrO 2 electrolytes, with the same nominal chemical composition of ( ZrO 2)0.90–( Y 2 O 3)0.04-( CaO )0.06, were sintered at 1600°C for 2, 4, 6, 8 and 10 h, respectively. The frequency dependence of the grain-boundary conductivity of each sample was measured using complex impedance method in the temperature range from 773 to 1073 K and experimental results were analyzed according to a power law, which was frequently referred to as the so-called universal dynamic response (UDR). Results indicated the apparent ac grain-boundary conductivity can be well-described by the power law and some useful information about the grain-boundary effect, such as the activation energy of the grain-boundary conduction and the dissociated energy of the charge carrier in the space charge layer, can be obtained by analyzing the temperature dependence of the power law parameters.

Depinning field of domain walls with a misaligned grain boundary in iron-based soft magnets

2016 ◽  
Vol 9 (5) ◽  
pp. 053003
Author(s):  
Keisuke Yamada ◽  
Shota Irie ◽  
Soh Murayama ◽  
Yoshinobu Nakatani
Keyword(s):  
Grain Boundary ◽  
Domain Walls ◽  
Soft Magnets ◽  
Iron Based ◽  
Depinning Field

Frequency dependence of the switching polarisation in PZT ceramics

2001 ◽  
Vol 257 (1) ◽  
pp. 227-232 ◽  
Author(s):  
M. H. Lente ◽  
J. A. Eiras
Keyword(s):  
Frequency Dependence ◽  
Pzt Ceramics
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