Results 11 to 20 of about 5,439 (217)

Field-driven merging of polarizations and enhanced electrocaloric effect in BaTiO3-based lead-free ceramics

open access: yesJournal of Advanced Ceramics, 2022
Solid-state cooling technology based on electrocaloric effect (ECE) has been advanced as an alternative to replace the vapour-compression approach to overcome the releasing of the global warming gases.
Xiang Niu   +12 more
doaj   +1 more source

The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency

open access: yesMaterials Research Express, 2018
This paper is about tailoring high permittivity of multi-walled carbon nanotubes/silver nanoparticles (MWNT-AgNP) filled polyvinyl alcohol (PVA) nanocomposites at low frequency. PVA/MWNT-AgNP nanocomposites were synthesized via solution-casting technique
Yusliza Yusof   +3 more
doaj   +1 more source

Dielectric properties of deformed early potatoes

open access: yesResearch in Agricultural Engineering, 2008
The permittivity of potato tissue was studied during uniaxial compression of cylindrical specimens prepared from two early varieties. Both the real and the imaginary permitivity components were determined repeatedly during the loading and unloading tests.
J. Blahovec
doaj   +1 more source

A Planar Millimeter-Wave Resonator-Array to Sense the Permittivity of COP Film with the 5G Handset Back-Cover

open access: yesSensors, 2021
In this paper, a new sensor is developed to estimate the dielectric constant of Cyclo Olefin Polymer (COP) film utilizable for 5G mobile phones’ multi-layered back-cover. It is featured by the electrical characterization of the thin layer of the COP film
Yejune Seo   +5 more
doaj   +1 more source

Microwave absorption properties of Co, Cu, Zn: substituted hexaferrite polychloroprene nanocomposites

open access: yesMaterials Research, 2008
The magnetic behavior and its relationship with microwave absorbing properties have been investigated for doped Z-type barium hexaferrites (Ba3Co1.3Zn0.3Cu0.4Fe 24O41)/ polychloroprene (CR) nanocomposites.
Valeska da Rocha Caffarena   +3 more
doaj   +1 more source

Effect of modifiers on the barium niobate-calcium ceramics structure

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2022
In this work, the ceramic samples Са0,3Ba0,7Nb2O6 pure and with modifying additives (5%) SrTiO3, KTaO3 or LiTaO3 were obtained by solid-phase synthesis. All studied compositions of ceramics revealed the presence of large and small grains.
O.S. Guseva   +2 more
doaj   +1 more source

Low permittivity epoxy nanoporous composites filled with hollow nanosilica

open access: yesIET Nanodielectrics, 2019
An epoxy nanoporous composite (NPC) filled with hollow nanosilica exhibits lower permittivity than unfilled epoxy resin. The hollow nanosilica is a silica nanoparticle containing a nanometric closed pore.
Muneaki Kurimoto   +5 more
doaj   +1 more source

Microwave dielectric properties of horticultural peat products [PDF]

open access: yesMires and Peat, 2007
The microwave dielectric properties of horticultural peat and compost peat were measured with a HP85107C network analyser in conjunction with a HP85070B open-ended coaxial dielectric probe for the frequency range 0.5–20 GHz.
G. Ayalew, N.M. Holden, S.M. Ward
doaj  

Microwave Interferometry Based On Open-ended Coaxial Technique for High Sensitivity Liquid Sensing

open access: yesAdvanced Electromagnetics, 2017
This paper describes a modified open-ended coaxial technique for microwave dielectric characterization in liquid media. A calibration model is developed to relate the measured transmission coefficient to the local properties of the sample under test.
H. Bakli, K. Haddadi
doaj   +1 more source

Processing Radargrams to Obtain Resistivity Sections

open access: yesRemote Sensing, 2022
Ground penetrating radar (GPR) is routinely used to locate the isolated elements that produce reflection hyperbolas in radargrams. However, we propose a method in this study for locating the various interfaces appearing in a medium by studying the signal
Lucía Arévalo-Lomas   +3 more
doaj   +1 more source

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