Results 101 to 110 of about 119,781 (297)

Lattice dynamics and phonon characteristics of complex perovskite microwave ceramics

IET Nanodielectrics, 2019
Complex perovskite microwave dielectric ceramics (MWDCs) of [inline-formula]-type (A = Ba, Sr,…; B′ = Mg, Zn,…; B″ = Nb, Ta), which exhibit excellent dielectric properties, have currently been widely used in microwave and millimetre wave devices ...
Feng Shi, He-Lei Dong, He-Lei Dong, Di Zhou, Chun-Hai Wang, Qiu-Lin Tan, Ji-Jun Xiong, Qing Wang   +7 more
doaj   +1 more source

Cool Kitchen: Processing Starch and Eggshell Powder into Sustainable Coatings for Passive Daytime Cooling

Advanced Functional Materials, EarlyView.
A food‐grade cooling composite made from starch and recycled eggshell powder offers a scalable, ultra‐low‐cost solution for passive daytime radiative cooling. Easily prepared using basic kitchen tools, this material empowers communities, even in areas with limited infrastructure, to stay cooler during worsening summer heat waves.
Qimeng Song, Evelyn Kubacki, Alexander Berger, Markus Retsch   +3 more
wiley   +1 more source

Overcoming Energy Storage‐Loss Trade‐Offs in Polymer Dielectrics Through the Synergistic Tuning of Electronic Effects in π‐Conjugated Polystyrenes

Advanced Science
Achieving high‐performance dielectric materials remains a significant challenge due to the inherent trade‐offs between high energy storage density and low energy loss.
Yipin Cheng, Honghong Gong, Meirong Zhang, Qinglong Ji, Guanxiang Zhang, Xiao Zhang, Zhicheng Zhang   +6 more
doaj   +1 more source

Ultra-wideband electromagnetic wave absorption in mmWave using dual-loss engineered M-type hexaferrite: A wave cancellation approach

Materials & Design
The development of broadband, high-performance electromagnetic (EM) wave absorbers in the millimeter-wave (mmWave) band requires optimizing both magnetic and dielectric losses, presenting significant challenges.
Jae Ryung Choi, Seong Jun Cheon, Hee Jung Lee, Sang-bok Lee, Byeongjin Park, Horim Lee   +5 more
doaj   +1 more source

In Situ Study of Resistive Switching in a Nitride‐Based Memristive Device

Advanced Functional Materials, EarlyView.
In situ TEM biasing experiment demonstrates the volatile I‐V characteristic of MIM lamella device. In situ STEM‐EELS Ti L2/L3 ratio maps provide direct evidence of the oxygen vacancies migrations under positive/negative electrical bias, which is critical for revealing the RS mechanism for the MIM lamella device.
Di Zhang, Rohan Dhall, Matthew M. Schneider, Cun Li, Chengyu Song, Sundar Kunwar, Hongyi Dou, Natanii R. Yazzie, Henry Tran, Daniel Appuing, Jim Ciston, Nicholas G. Cucciniello, Pinku Roy, Michael T. Pettes, John Watt, Winson Kuo, Haiyan Wang, Ye Cao, Rodney J. McCabe, Aiping Chen   +19 more
wiley   +1 more source

EXICITATION OF WHISPERING GALLERY MODES IN A DISK PLANAR DIELECTRIC RESONATOR BY A COUPLING SLOT

Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2017
The spectral and energy characteristics of disk planar dielectric resonator (DR) with high-order whispering gallery modes (WGMs) were investigated in Ka-band.
A, Ye. Kogut, R. S. Dolia, S. O. Nosatiuk, Ye. A. Shulha, He Jaochan   +4 more
doaj  

Coordinated Multi‐Component Gradient Engineering of Catalyst Layers for Advanced Polymer Electrolyte Fuel Cells

Advanced Functional Materials, EarlyView.
This work presents a continuous linear gradient catalyst layer design, a general strategy for improving membrane electrode assemblies across electrochemical devices. Fabricated via a dual‐nozzle spray coating method, the architecture controls the Pt/carbon ratio, ionomer content and ionomer type across the catalyst layer, enhancing proton conduction ...
Shangwei Zhou, Matt P. Tudball, Yiming Guo, Bia Brandt, Adam Zucconi, Wenjia Du, Junfu Bu, Daniel H. C. Wan, Jianuo Chen, Emanuele Magliocca, Feng Ryan Wang, Alexander J.E. Rettie, Patrick S. Grant, Paul R. Shearing, Rhodri Jervis, Thomas S. Miller   +15 more
wiley   +1 more source

Studying the Effect of Frequency on Dielectric Properties of Cu Powder reinforced Epoxy Composite Material

مجلة النهرين للعلوم الهندسية, 2014
This paper discussed the effect of frequency on dielectric properties of different weight fraction of Cu powder reinforced epoxy composite materials. Dielectric properties of epoxy material was reinforced with (0, 5, 15, 30, 45) % weight fraction of Cu ...
Walaa W. Jameel
doaj  

Preparation and characterization of Bi4–xPrxTi3O12 solid solutions

Chimica Techno Acta, 2017
The Bi4–xPrxTi3O12 (BPT) solid solutions (x = 0.05, 0.10, 0.15) with small praseodymium content were prepared by solid-state method. Thermal, electric, and dielectric properties of BPT were studied.
A. I. Klyndyuk, E. A. Chizhova, A. I. Poznyak   +2 more
doaj   +1 more source

Dielectric Losses of Doped Colored Crystals

The Journal of Chemical Physics, 1957
The dielectric losses of KBr single crystals doped with BaBr2 at different concentrations, both uncolored and additively colored, have been measured. A maximum in the dielectric loss versus frequency curve in the additively colored crystal was observed. This relaxation maximum was found to be due to the presence of Z2 centers.
openaire   +2 more sources