On the Influence of Material Objectivity on Electroelastic Dissipation in Polarized Ferroelectric Ceramics

1996 ◽  
Vol 1 (1) ◽  
pp. 45-55 ◽  
Author(s):  
H. F. Tiersten
Keyword(s):  
Ferroelectric Ceramic ◽  
Ferroelectric Ceramics ◽  
Macroscopic Model ◽  
Spin Tensor ◽  
Material Objectivity ◽  
Rotationally Invariant

An earlier system of rotationally invariant electroelastic equations for deformable insulators, which was derived from a well-defined macroscopic model, is extended to include the simplest mechanical and electrical viscous-type dissipation. The resulting nonlinear description satisfies the principle of material objectivity. When the resulting description is linearized, the viscous-type linear electrical dissipative variable contains the spin tensor because a biasing polarization is present in the ferroelectric ceramic.

Bi(Mg1/2Zr1/2)O3-PbZrO3-PbTiO3 relaxor ferroelectric ceramics with large and temperature-insensitive electric field induced strain response

2021 ◽  
Author(s):  
Hongrui Jia ◽  
Zhigang Liang ◽  
Zhen Li ◽  
Fei Li ◽  
Linghang Wang
Keyword(s):  
Electric Field ◽  
Ceramic Materials ◽  
Ferroelectric Ceramic ◽  
Relaxor Ferroelectric ◽  
Ferroelectric Ceramics ◽  
Harsh Environment ◽  
Strain Response ◽  
Practical Application ◽  
Electric Field Induced Strain ◽  
Relaxor Ferroelectric Ceramics

Ferroelectric ceramic materials with large and temperature-insensitive strain response are highly desired for the practical application of actuator in harsh environment conditions. In this work, a novel xBi(Mg1/2Zr1/2)O3-(0.55-x)PbZrO3-0.45PbTiO3 (xBMZ-PZ-0.45PT) ternary...

PZT ceramic particles/polyurethane composites formalism for mechanical energy harvesting

2020 ◽  
Vol 89 (3) ◽  
pp. 30901 ◽  
Author(s):  
Abdelkader Rjafallah ◽  
Abdelowahed Hajjaji ◽  
Fouad Belhora ◽  
Abdessamad El Ballouti ◽  
Samira Touhtouh ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Electromechanical Coupling ◽  
Piezoelectric Coefficient ◽  
Mechanical Energy ◽  
Electrical Power ◽  
Ferroelectric Ceramic ◽  
Ferroelectric Ceramics ◽  
High Compliance ◽  
Polyurethane Composites ◽  
Good Agreement

More recently, the ferroelectric ceramic/polymer composites have been progressively replacing ferroelectric ceramics and polymers as they combine their interesting properties. Such as high compliance of polymers and high electromechanical coupling of ferroelectric ceramics those are required for piezoelectric transducer applications. At the same time, the ferroelectric ceramic/polymer composites formalism for predicting their energy-conversion capabilities is of both academic and industrial interest. The novelty of this paper is that the electrical power harvested by the PZT/PU polarized composite has been expressed in terms of the effective longitudinal piezoelectric coefficient (d33) of the composite via a parameter p related to the poling ratio. Besides, the parameter p, that is characterizing the PZT/PU composites with different longitudinal piezoelectric coefficients (d33), was evaluated. The other parameters of the electrical power expression were calculated using the Yamada model for the dielectric, piezoelectric and elastic constants. Finally, a good agreement was found between experience and model.

Ferroelectric Thin Films in Micro-electromechanical Systems Applications

MRS Bulletin ◽  
1996 ◽  
Vol 21 (7) ◽  
pp. 59-65 ◽  
Author(s):  
D.L. Polla ◽  
L.F. Francis
Keyword(s):  
Thin Films ◽  
Integrated Circuit ◽  
Microelectromechanical Systems ◽  
Pressure Sensors ◽  
Ferroelectric Ceramic ◽  
Consumer Electronics ◽  
Ferroelectric Ceramics ◽  
Control Electronics ◽  
Commercial Applications ◽  
And Control

Ferroelectric ceramic thin films fit naturally into the burgeoning field of microelectromechanical systems (MEMS). Microelectromechanical systems combine traditional Si integrated-circuit (IC) electronics with micromechanical sensing and actuating components. The term MEMS has become synonymous with many types of microfabricated devices such as accelerometers, infrared detectors, flow meters, pumps, motors, and mechanical components. These devices have lateral dimensions in the range of 10 μm–10 mm. The ultimate goal of MEMS is a self-contained system of interrelated sensing and actuating devices together with signal processing and control electronics on a common substrate, most often Si. Since fabrication involves methods common to the IC industry, MEMS can be mass-produced. Commercial applications for MEMS already span biomedical (e.g., blood-pressure sensors), manufacturing (e.g., microflow controllers), information processing (e.g., displays), and automotive (e.g., accelerometers) industries. More applications are projected in consumer electronics, manufacturing control, communications, and aerospace. Materials for MEMS include traditional microelectronic materials (e.g., Si, SiO2, Si3N4, polyimide, Pt, Al) as well as nontraditional ones (e.g., ferroelectric ceramics, shapememory alloys, chemical-sensing materials). The superior piezoelectric and pyroelectric properties of ferroelectric ceramics make them ideal materials for microactuators and microsensors.

A Method for Measuring Short Crack R-Curve Behavior of Ferroelectric Ceramic

1999 ◽  
Author(s):  
Wei Chen ◽  
Christopher S. Lynch ◽  
Doru Lupascu
Keyword(s):  
Crack Length ◽  
Surface Crack ◽  
Damage Zone ◽  
Ferroelectric Ceramic ◽  
Ferroelectric Ceramics ◽  
Lead Lanthanum Zirconate Titanate ◽  
Lanthanum Zirconate ◽  
Linear Elastic ◽  
Four Point Bending ◽  
Knoop Indentation

Abstract This work describes a method for measurement of R-curve behavior in ferroelectric ceramics using four point bending specimens with a controlled surface crack. A short surface crack is produced by a Knoop indentation and the damage zone is polished away. The results are compared for two compositions of lead lanthanum zirconate titanate (PLZT), an elastio-plastic ferroelectric composition and a linear elastic electrostrictive composition. R-curves are measured in the crack length regime of 0.1 to 0.8 mm. The ferroelastic composition displays a toughness increase from 0.7 to 1.4 MPam. The linear elastic composition displays a constant toughness of between 0.6 and 0.7 MPa√m. The R-curve behavior of PLZT 8/65/35 is attributed to ferroelastic toughening.

scholarly journals Ferroelectric ceramic materials of the Aurivillius family

2013 ◽  
Vol 03 (04) ◽  
pp. 1330003 ◽  
Author(s):  
A. Peláiz-Barranco ◽  
Y. González-Abreu
Keyword(s):  
Lead Zirconate Titanate ◽  
Ceramic Materials ◽  
Ferroelectric Ceramic ◽  
Lead Zirconate ◽  
Ferroelectric Ceramics ◽  
Wide Range ◽  
Medical Diagnostic ◽  
Pyroelectric Sensors ◽  
Commercial Applications ◽  
High Dielectric

Ferroelectric ceramics are important materials with a wide range of industrial and commercial applications. Since the discovery of the phenomenon of ferroelectricity, they have been the heart and soul of several multibillion dollar industries, ranging from high-dielectric-permittivity capacitors to developments in piezoelectric transducers, pyroelectric sensors, medical diagnostic transducers, electro-optical devices, etc. Materials based on barium titanate and lead zirconate titanate have dominated the field throughout their history. Actually, the ferroelectric ceramics from the Aurivillius family receive great attention due to their large remanent polarization, lead-free nature, relatively low processing temperatures, high Curie temperatures and excellent piezoelectric properties, which made them good candidates for multiple applications. This review presents a general overview of the progress in the studies on the ferroelectric ceramics from the Aurivillius family. The progress includes several aspects: (i) structural studies, (ii) dielectric and electric behavior, (iii) piezoelectricity, and (iv) pyroelectricity.

Harvesting Power Through Random Vibrations of Aerospace Vehicles from Nanostructured La-Pb(Ni1/3Sb2/3) - PbZrTiO3 Ferroelectric Ceramics

2016 ◽  
Vol 66 (4) ◽  
pp. 353 ◽  
Author(s):  
H.H. Kumar ◽  
C.M. Lonkar ◽  
Balasubramanian K.
Keyword(s):  
Perovskite Phase ◽  
Average Particle Size ◽  
Particle Morphology ◽  
Ferroelectric Ceramic ◽  
Ferroelectric Ceramics ◽  
Average Particle ◽  
Reactive Sintering ◽  
Random Vibrations ◽  
Aerospace Vehicles ◽  
Power Harvesting

Synthesis by mechanochemical activation route and optimisation for power harvesting properties of nano-structured Pb0.98La0.02(NiSb)0.05[(Zr0.52Ti0.48)0.995]0.95O3 [La-PNS-PZT] ferroelectric ceramic composition has been carried out and reported here for the first time. Progressive perovskite phase formation during mechanical activation from 5 h to 40 h followed by reactive sintering was analyzed from X-Ray Diffraction analysis. Noticeable formation of perovskite phase after10 h of milling and further its completion in successive reactive sintering was observed. Particle morphology of the 10 h activated nano-La-PNS-PZT powder analysed by High Resolution Transmission Electron Microscope (HRTEM) indicated average particle size (d50) of about 24nm. Microstructural studies of samples reactively sintered at 1220 °C were performed by Field Emission Scanning Electron Microscopy (FESEM) for powders activated for various durations, indicated the compact microstructure for 10 h activation which resulted in optimum piezoelectric properties viz. piezoelectric charge coefficient (d33=449x10-12 C/N), piezoelectric voltage coefficient (g33= 32x10-3 m-V/N), Figure of merit for power harvesting (14.4 x10-12 V-m-C/N2) accompanied by excellent stability of permittivity in the range -50 °C to 100 °C. The output voltage obtained from simulated random vibrations of aerospace vehicles at various Power Spectrum Density (PSD) values, measures about 3.0 mV output across resistance of 1 kΩ  indicating suitability of composition for harvesting the power from aerospace vehicle vibrations.

Quantitative Microanalysis of (1–x)Pb(Mg1/3Nb2/3)O3×xPbTiO3(PMNT) Ferroelectric Ceramics

2015 ◽  
Vol 21 (5) ◽  
pp. 1138-1144
Author(s):  
Zoran Samardžija
Keyword(s):  
Single Crystal ◽  
Ferroelectric Ceramic ◽  
Ferroelectric Ceramics ◽  
Average Chemical Composition ◽  
Quantitative Microanalysis ◽  
Phase Boundary Composition ◽  
Quantitative Electron Probe Microanalysis ◽  
Perovskite Type ◽  
Compositional Characterization

AbstractOptimized quantitative electron-probe microanalysis was applied for compositional characterization of a ferroelectric ceramic single crystal that was made from the complex perovskite-type solid-solution (1–x)Pb(Mg1/3Nb2/3)O3×xPbTiO3(PMNT). Cation concentrations were determined with high accuracy and ultimate relative experimental uncertainty of ≤±1%, showing that the average chemical composition of the crystal corresponds to Pb(Mg1/3Nb2/3)0.67Ti0.33O3(i.e.,x=0.33), which is close to the morphotropic phase boundary composition. Over the PMNT single crystal slight compositional heterogeneity was measured for concentrations of the perovskite B-site cations Ti4+, Mg2+, and Nb5+, with variations up to ±2.3%, whereas the Pb concentration remained uniform within a variation below ±0.5%.

Tunable Ferroelectric Ceramic Components for Reconfigurable Wireless Communications

2012 ◽  
Vol 2012 (CICMT) ◽  
pp. 000455-000463
Author(s):  
Y. Zheng ◽  
M. Sazegar ◽  
H. Maune ◽  
J. R. Binder ◽  
X. Zhou ◽  
...  
Keyword(s):  
Insertion Loss ◽  
Sol Gel ◽  
Cognitive Radios ◽  
Ferroelectric Ceramic ◽  
Split Ring Resonator ◽  
Ferroelectric Materials ◽  
Ferroelectric Ceramics ◽  
Complementary Split Ring Resonator ◽  
Matching Networks ◽  
Agile Software

This paper focuses on the technology evolvement and novel concepts of ferroelectric microwave components. They aim to enable reconfigurable wireless frontends for frequency-agile, software-defined and cognitive radios. Such components are an emerging technology based on the nonlinear solid state ferroelectric materials like Barium-Strontium-Titanate namely BST thick-films. They are expected to cope with the demands of multiband and multi-standard operation. Processing and integration technologies are revised to enable multilayer component realization, including selective sol-gel printing and vertical connection through laser drilling. Several novel kernel frontend components based on ferroelectric thick-film ceramic are addressed then. The challenging trend of antennas towards compactness with wider spectrum coverage is coped with several tunable resonant modes in the antennas with integrated BST varactors. The optimized prototype for frequency division duplex services covers 1.47 GHz to 1.76 GHz with a variable distance between up- and down-link channels. The environmental impact on antennas can be compensated by tunable matching networks. In the commercial frequency range from 1.8 GHz to 2.1 GHz, a demonstrative module exhibits an insertion loss less than 0.98 dB, in a compact multilayer package. A compact bandpass filter is enabled by an evanescent mode substrate integrated waveguide cavity in ferroelectric ceramics, integrated with tunable complementary split ring resonator scatterers and tunable matching networks. The compact module covers 2.95 GHz to 3.57 GHz with a comparatively low insertion loss.

Superior energy-storage performance in 0.85Bi0.5Na0.5TiO3–0.15NaNbO3 lead-free ferroelectric ceramics via composition and microstructure engineering

2021 ◽  
Vol 9 (16) ◽  
pp. 10088-10094
Author(s):  
Chao Zhang ◽  
Wenrong Xiao ◽  
Fangfang Zeng ◽  
Dong Su ◽  
Kang Du ◽  
...  
Keyword(s):  
Energy Storage ◽  
Ferroelectric Ceramic ◽  
Lead Free ◽  
Ferroelectric Ceramics ◽  
Storage Performance ◽  
High Dielectric

A high dielectric energy storage performance is achieved in a 0.85Bi0.5Na0.5TiO3–0.15NaNbO3 lead-free ferroelectric ceramic via composition and microstructure engineering.

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