Results 31 to 40 of about 287,449 (377)

Optical Properties of Au-Based and Pt-Based Alloys for Infrared Device Applications: A Combined First Principle and Electromagnetic Simulation Study

open access: yesMicromachines, 2019
Due to the rapid progress in MEMS-based infrared emitters and sensors, strong demand exists for suitable plasmonic materials for such microdevices. We examine the possibility of achieving this goal by alloying other metals with the noble metals Au and Pt,
Min-Hsueh Chiu   +2 more
doaj   +1 more source

Modeling of a Negative Refractive Index Metamaterial Unit-Cell and Array for Aircraft Surveillance Applications

open access: yesIEEE Access, 2022
In this paper, a unique negative refractive index-metamaterial (NRI-MTM) structure is proposed for traffic alert and collision avoidance system (TCAS) for aircraft application. The NRI-MTM unit-cell structure is a combination of square and circular split
M. Pallavi   +3 more
doaj   +1 more source

CaCu3Ti4O12 ceramics from co-precipitation method: Dielectric properties of pellets and thick films [PDF]

open access: yes, 2009
Dielectric properties of CaCu3Ti4O12 (CCTO)-based ceramics and thick films (e ∼50m) prepared from powders synthesized by a soft chemistry method (co-precipitation) are presented and discussed.
Barbier, Bertrand   +7 more
core   +3 more sources

Synthesis, characterization, and microwave properties of polypyrrole/molybdenum trioxide composites

open access: yesScience and Engineering of Composite Materials, 2014
Polypyrrole/molybdenum trioxide (MoO3) composites have been prepared by the in situ polymerization technique. The prepared composites were characterized by Fourier transform infrared spectroscopy and surface morphology by employing scanning electron ...
Anuradha Sindi   +2 more
doaj   +1 more source

L‐band depolarised radar back scattering from Martian topographic surface: A numerical study

open access: yesIET Radar, Sonar & Navigation, 2021
The interaction of radar signals with a planetary surface is critical for the utility of radar data. Herein, a power‐law roughness spectrum is used to model the roughness and an inhomogeneous vertical permittivity to describe the dielectrics from the ...
Ying Yang   +3 more
doaj   +1 more source

Nonlinear effects in a cell with a solid electrolyte based on protonated potassium polytitanate [PDF]

open access: yesЭлектрохимическая энергетика, 2022
In this paper, the electrochemical and electrophysical properties of protonated potassium polytitanate synthesized at pH values varying from 3.11 to 8.88 depending on the magnitude of the polarization voltage and the magnitude of the measured signal were
Makarova, Anna Dmitrievna   +7 more
doaj   +1 more source

Microstructure and properties of Bi(2)O(3) doped 0.8(K(0.52)Na(0.48)) NbO(3)–0.2KSr(2)Nb(5)O(15) lead-free ceramics

open access: yesIET Nanodielectrics, 2019
The 0.8(K(0.52)Na(0.48))NbO(3)–0.2KSr(2)Nb(5)O(15)-yBi(2)O(3) (0.8KNN-0.2KSN-yBi(2)O(3)) lead-free ferroelectric composite ceramics were synthesised using rod-like KSr(2)Nb(5)O(15) (KSN) and isometric (K(0.52)Na(0.48))NbO(3) (KNN) particles as raw ...
Yi-ting Guo   +4 more
doaj   +1 more source

Effect of Nb doping on sintering and dielectric properties of PZT ceramics [PDF]

open access: yesProcessing and Application of Ceramics, 2016
The extensive use of piezoelectric ceramics such as lead zirconate titanate (PZT) in different applications became possible with the development of donor or acceptor dopants.
Ali Mirzaei   +2 more
doaj   +1 more source

Complex effective permittivity of a lossy composite material [PDF]

open access: yes, 1996
In recent work, boundary integral equations and finite elements were used to study the (real) effective permittivity for two-component dense composite materials in the quasistatic limit.
Beroual, Abderrahmane   +3 more
core   +3 more sources

PVDF-based dielectric polymers and their applications in electronic materials

open access: yesIET Nanodielectrics, 2018
The attractive dielectric poly(vinylidene fluoride) (PVDF) and its copolymers are well confirmed possessing the highest electroactive response including dielectric constant, piezoelectric and ferroelectric effects, which have increasingly wide range of ...
Weimin Xia, Zhicheng Zhang
doaj   +1 more source

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