Results 51 to 60 of about 11,340 (302)

Resonant Domain Wall Dynamics in a Three‐Dimensional Magnetic Nano Double Helix

Advanced Materials, EarlyView.
3D magnetic nanostructures promise exciting possibilities for magnetization dynamics. However, experimental realizations remain scarce. In nanoprinted cobalt double helices, time‐resolved X‐ray microscopy reveals harmonic domain wall dynamics. Simulations identify the mode and additional higher‐frequency resonances, revealing a rich dynamic landscape ...
Pamela Morales‐Fernández, Iason Konstantinos‐Douveas, Claas Abert, Elina Zhakina, Sandra Ruiz‐Gómez, Claudia Fernández‐González, Luke Alexander Turnbull, Sebastian Wintz, Markus König, Simone Finizio, Markus Weigand, Naëmi Leo, Dieter Suess, Aurelio Hierro‐Rodríguez, Amalio Fernández‐Pacheco, Claire Donnelly   +15 more
wiley   +1 more source

Copper Particle Effect on the Breakdown Strength of Insulating Oil at Combined AC and DC Voltage [PDF]

Journal of Electrical Engineering and Technology, 2017
Converter transformer is the key equipment of high voltage direct current transmission system. The solid suspending particles originating from the process of installation and operation of converter transformer have significant influence on the insulation performance of transformer oil, especially in presence of DC component in applied voltage.
You-Yuan Wang, Yuan-Long Li, Chao Wei, Jing Zhang, Xi Li   +4 more
openaire   +1 more source

Space charge and DC dielectric breakdown in polymeric insulation

, 2012
many years but the mechanisms that cause breakdown have not been fully understood. Charge injection always occurs at high electric fields and especially under dc conditions.
George Chen, Zhao, Junwei, Junwei Zhao, Chen, George   +3 more
core   +1 more source

Origin of thickness dependent dc electrical breakdown in dielectrics [PDF]

, 2012
A model based on space charge dynamics under high dc electric field has been proposed to explain commonly observed thickness dependent breakdown of polymeric material.
Li, Shengtao, Zhao, J, George Chen, Junwei Zhao, Chen, G, Zhong, Lisheng, Shengtao Li, Lisheng Zhong   +7 more
core   +1 more source

Surface‐Functionalized LLZO‐Incorporated Multilayer Composite Solid Electrolytes for Dendrite Suppression and Efficient Ionic Conduction in Lithium–Metal Batteries

Advanced Materials, EarlyView.
A soft–hard tri‐layer composite electrolyte that couples fast Li+ transport with reinforced interfacial stability to enable high‐conductivity, mechanically robust, dendrite‐free lithium‐metal batteries. ABSTRACT The development of solid polymer electrolytes is central to safe, high‐energy lithium‐metal batteries (LMBs); however, persistent challenges ...
Fazal Ur Rehman, Minhong Woo, Hyesoo Choi, Jihwan Kim, Yujin Kim, Sanghee Park, Serim Ahn, Jinsub Lim, Minyoung Kim, Mincheol Chang   +9 more
wiley   +1 more source

The effects of hydration on the DC breakdown strength of polyethylene composites employing oxide and nitride fillers [PDF]

IEEE Transactions on Dielectrics and Electrical Insulation, 2017
Particle dispersion, water absorption/desorption and electrical breakdown behavior were studied in a range of polyethylene composites having a common matrix morphology. Three different conditioning routes (dry, ambient and wet) were used to vary the absorbed water content.
Hosier, Ian, Praeger, Matthew, Vaughan, Alun, Swingler, Steven   +3 more
openaire   +2 more sources

Influence of Carbon Nanoparticles on Electrically Induced Wear of Grease‐Lubricated Steels

Advanced Materials Interfaces, EarlyView.
When an electric current enters a pair of rubbing surfaces, enormous damage takes place. In this research, how such damage occurs in the presence of protective grease and the mitigation with added carbon nanoparticles, were investigated. It was discovered that those particles regulate transport and interfacial electrical stability of the grease ...
Mohammad Humaun Kabir, Darrius Dias, Jacob Bons, MD Wasek Foysal, Evan Johnson, Joe Kosmoski, Hong Liang   +6 more
wiley   +1 more source

Experimental Study on Breakdown Characteristics of Transformer Oil Influenced by Bubbles

Energies, 2018
Bubbles will reduce the electric strength of transformer oil, and even result in the breakdown of the insulation. This paper has studied the breakdown voltages of transformer oil and oil-impregnated pressboard under alternating current (AC) and direct ...
Chunxu Qin, Yan He, Bing Shi, Tao Zhao, Fangcheng Lv, Xiangrui Cheng   +5 more
doaj   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Experimental study of polymeric cable insulation under DC-superimposed long temporary overvoltage and lightning impulse voltage stress

Materials Research Express
Fault events in high-voltage direct current (DC) cable systems can generate DC-superimposed long temporary overvoltages (DC-LTOVs), same-polarity impulses that create stress conditions different from those in conventional superimposed lightning impulse ...
Robert Gerlach, Till Scholz, Willem Leterme, Bastian Soppe, Tanumay Karmokar, Isabella Nett, Dominik Häring   +6 more
doaj   +1 more source