نتایج جستجو برای: microwave absorbing material

تعداد نتایج: 423750  

Journal: :Journal of Low Temperature Physics 2022

Circuit quantum electrodynamics (cQED) experiments on superconducting qubit systems typically employ radiation shields coated in photon absorbing materials to achieve high coherence and low microwave resonator losses. In this work, we present preliminary results the performance of Vantablack as a novel infrared (IR) shielding material for cQED systems. We compare properties residual excited sta...

2015
K. Praveena K. Sadhana

This review focuses on two systems, nanocrystalline Zn substituted Co1-xZnxFe2O4 (0≤x≥1) and Ni0.4Zn0.2Mn0.4Fe2O4, were synthesized using microwave hydrothermal and auto-combustion method respectively. The synthesized powders were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), thermo-gravimetricdifferential thermal analysis (TG-DTA) and FTIR. The average parti...

2010
J. Klačka

Scattering of electromagnetic radiation by a charged homogeneous spherical particle/body is treated. Theoretical solution represents a generalization of the Mie’s scattering theory for electrically neutral sphere. It is shown that classical and quantum physics approaches may lead to different conclusions, as documented by numerical computations assuming various permeabilities, refractive indice...

Journal: :journal of optimization in industrial engineering 2010
mohammad saber fallah nezhad seyed taghi akhavan niaki

in this paper, absorbing markov chain models are developed to determine the optimum process mean levels for both a single-stage and a serial two-stage production system in which items are inspected for conformity with their specification limits. when the value of the quality characteristic of an item falls below a lower limit, the item is scrapped. if it falls above an upper limit, the item is ...

Journal: :The Journal of the Acoustical Society of America 1983

Journal: :International Journal of Environmental Analytical Chemistry 2022

In the present study, a combined process of microwave-assisted chlorination roasting-water leaching was developed to efficiently extract metal ions from spent ternary lithium-ion batteries. Polyvinyl chloride (PVC) used as chlorine source generate HCl for reaction. Activated carbon first selected optimal absorbing medium material. Subsequently, anode graphite induce carbonisation reduction reac...

2014
E. DelRe

We investigate theoretically, numerically and experimentally nonlinear optical waves in an absorbing out-of-equilibrium colloidal material at the gelification transition. At sufficiently high optical intensity, absorption is frustrated and light propagates into the medium. The process is mediated by the formation of a matter-shock wave due to optically induced thermodiffusion, and largely resem...

2017
Ying Wang Yunchen Du Ping Xu Rong Qiang Xijiang Han

Microwave absorbing materials (MAMs) are paving the way for exciting applications in electromagnetic (EM) pollution precaution and national defense security, as they offer an advanced alternative to conventional reflection principles to fundamentally eliminate the EM waves. Conjugated polymer (CP)-based composites appear as a promising kind of MAM with the desirable features of low density and ...

2011
Monika BIĽOVÁ Ervin LUMNITZER

Acoustical parameters of porous materials give the necessary and important information for noise control engineers. Profound knowledge their physical characteristics enable an effective sound absorber material design. The theory of sound-absorbing materials has progressed considerably during the last decade. A noise control engineer with serious interest in sound absorbing technology is advised...

2008
Tzu-Hao Ting Kuo-Hui Wu Ming-Ho Chuang Cheng-Chien Yang

Bamboo charcoal coated with silver (BC/Ag) was prepared by activation and chemical reduction processes at different AgNO3 contents (10-30 wt.%). The spectroscopic characterizations of the formation processes of BC/Ag composites were studied using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. These composites were introduced in epoxy resin to be a microwav...

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