Concept

Electroceramics

Publications associées (37)

Effect of Uniaxial Compressive Stress on Dielectric and Piezoelectric Responses in Lead Zirconate Titanate Based Ceramics

A uniaxial compressive stress significantly modifies the dielectric and piezoelectric response of Pb(Zr,Ti)O3 (PZT)-based piezoceramics. In soft PZT, the pre-stress decreases both the piezoelectric coefficient and its increment with increasing dynamical st ...

2012

Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures

Dragan Damjanovic

The crystal structure and property changes of sodium bismuth titanate (Na0.5Bi0.5TiO3, NBT) piezoelectric ceramics are reported as a function of La modification (0.5-2.0 at. %) and increasing temperature using high resolution x-ray diffraction, permittivit ...

American Institute of Physics2012

Position of defects with respect to domain walls in Fe[sup 3+]-doped Pb[Zr[sub 0.52]Ti[sub 0.48]]O[sub 3] piezoelectric ceramics

Dragan Damjanovic, Li Jin

The position of (Fe-Zr',(Ti)-V-O(center dot center dot))(center dot) defect complexes in Pb[Zr0.52Ti0.48]O-3 (PZT) piezoelectric ceramics was investigated by means of electron paramagnetic resonance (EPR) spectroscopy. The method of analysis pursued to obt ...

American Institute of Physics2011

Broadband Dielectric Response in Hard and Soft PZT

Li Jin

Lead zirconate titanate (Pb(Zr1-xTix)O3 or PZT) ferroelectric ceramics have been widely used in transducers, actuators, and sensors, since they posses high dielectric and piezoelectric properties with a relatively high temperature of operation. Commerciall ...

EPFL2011

X-ray Imaging and Analysis of 3D Microstructural Changes in Aged Ni-YSZ Anode

Jan Van Herle, Aïcha Hessler-Wyser, Antonin Faes

Ni-YSZ anode supports were used to fabricate test cells composed of yttria-stabilised zirconia (YSZ) electrolyte and lanthanum strontium ferrite (LSF) or lanthanum strontium manganite (LSM) / YSZ cathodes. These cells were operated at 720 °C at an average ...

2011

Enhanced Curie temperature and nonvolatile switching of ferromagnetism in ultrathin (Ga,Mn)As channels

Nava Setter, Igor Stolichnov, Harry Joseph Trodahl, Sebastian Riester, Evgeny Mikheev

The integration of ferroelectric polymer gates on a Mn-doped GaAs magnetic channel provides a promising route for the persistent field-effect control of magnetic properties in high-quality diluted magnetic semiconductors (DMSs) that are otherwise incompati ...

2011

Properties of lanthanum doped BaTiO3 produced from nanopowders

Paul Bowen

Pure and barium titanate (BT) powders doped with different lanthanum concentration were prepared by the polymeric precursor method (Pechini process) which was carried out as a three-stage process from organometallic complexes. Sintering of pressed powders ...

Elsevier2010

PFM investigation of stress induced ferroelastic switching in piezoelectric bulk ceramics

Nava Setter, Dragan Damjanovic, Tomas Sluka, Enrico Colla, Mahamudu Mtebwa

Stress induced ferroelastic switching may represent an efficient toughening mechanism in piezoelectric-ferroelectric ceramics. During the crack propagation, the high tensional stresses at the crack tip can be partially released by the reorientation of 90 d ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Dynamic fragmentation of ceramics, signature of defects and scaling of fragment sizes

Jean-François Molinari, Sarah Levy

Defects play a critical role in the dynamic fragmentation process of structural ceramics. Cracks initiate at seemingly random locations, propagate and coalesce to form fragments. The process is accompanied by stress release waves, whose influence is diffic ...

Elsevier2010

Dielectric and piezoelectric properties of PZT ceramics with anisotropic porosity

Dragan Damjanovic

Pb(Zr,Ti)O3 ceramics with homogenous, anisotropic porosity were manufactured and the influence of the anisotropic porosity on the dielectric and piezoelectric properties was studied. Image analysis allowed the quantification of the preferential orientation ...

Springer Verlag2010

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