A novel hierarchical heterostructure of Ni microspheres-CuO nano-rices was fabricated using a simple two-step process. The CuO rices were densely deposited on the surfaces of Ni microspheres. The phase purity, morphology, and structure of composite heterostructures are characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectros...

In this work, the investigation of wave absorption, phase formation, crystal structure and magnetic properties of SrFe12O19 hexa-ferrites nanoparticles that synthesized by co-precipitation using a microwave heating system and polyaniline-SrFe12O19 was carried out by using a combination of vector network analyser (VNA), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier tra...

This study presents microwave absorption of raw materials used in barium borosilicate, Fe-doped alumina phosphate and zinc borate glass. Microwave absorption was investigated for the raw materials SiO2, Na2CO3, BaCO3, BPO4, Al(PO3)3, Mg(PO3)2, Al(OH)3, TiO2. The study shows that SiO2 could be heated directly above 1000 °C within 30 min at 1.5 kW microwave output (MW) power and 0.8 kW MW power i...

In order to explore high efficiency microwave absorption materials, heteronanostructured Co@carbon nanotubes-graphene (Co@CNTs-G) ternary hybrids were designed and produced through catalytic decomposition of acetylene at the designed temperature (400, 450, 500 and 550 °C) over Co3O4/reduced graphene oxide (Co3O4/RGO). By regulating the reaction temperatures, different CNT contents of Co@CNTs-G ...

.................................................................................................... 9 Chapter 1: Introduction ........................................................................ 10 1.1 The waste tire ............................................................................. 10 1.2 Methods for recycling waste tires ............................................. 13 1.2.1 L...

To design and fabricate rational surface architecture of individual particles is one of the key factors that affect their magnetic properties and microwave absorption capability, which is still a great challenge. Herein, a series of Co20Ni80 hierarchical structures with different surface morphologies, including flower-, urchin-, ball-, and chain-like morphologies, were obtained using structure-...

U. Kuhl and H.-J. Stöckmann Fachbereich Physik, Philipps-Universität Marburg, Renthof 5, D-35032 Marburg, Germany M. Mart́ınez-Mares Departamento de F́ısica, UAM-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, 09340 México D. F., México R.A. Méndez-Sánchez Centro de Ciencias F́ısicas, Universidad Nacional Autónoma de México, A.P 48-3, 62210, Cuernavaca, Mor., México J. Main Institut für Th...

Abstract The following text gives a brief overview of microwave radiative transfer in atmospheres covering the principles of radiative transfer in an absorbing and scattering atmosphere including surface reflection and emission. A few approaches for radiative transfer modelling are presented. Models for atmospheric absorption, particle absorption and scattering as well as surface emission are i...

Wave absorption metamaterials have been an enduring topic over the past two decades, propelled not only by novel scientific advances, but also their extensive application potential. In this review, we aim to provide some general insights into mechanism common both microwave and acoustic systems. By establishing a universal model for resonance-based metamaterials, present theoretical conditions ...

Graphene has evoked extensive interests for its abundant physical properties and potential applications. It is reported that the interfacial electronic interaction between metal and graphene would give rise to charge transfer and change the electronic properties of graphene, leading to some novel electrical and magnetic properties in metal-graphene heterostructure. In addition, large specific s...