Materials Literature
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Hollow silica spheres were prepared by spray drying of precursor solution of colloidal silica. The precursor solution is composed of 10-20 nm colloidal silica dispersed in a water or ethanol-water mixture solvent with additives of tris hydroxymethyl aminomethane. The effect of pH and concentrations of the precursor an…
In this work it is evaluated the electrochemical performance of reinforced concrete exposed to the environment of the city of Xalapa, Veracruz, to portray the effect in the durability, since this depends not only from its mechanical features but also from the environment in which the structure will be build, as it has…
A dual band planar antenna based on metamaterial transmission lines is presented for WLAN, WiMAX, and satellite system communication applications. This antenna is composed of an interdigital capacitor and a ground plane with triangular shaped slots on its top edges to broaden the impedance bandwidth. The measured band…
The resistive switching properties in amorphous Pr0.67Sr0.33MnO3 films deposited by pulsed laser deposition are investigated. Reproducible and bipolar counter-8-shape and 8-shape switching behaviours of Au/Pr0.67Sr0.33MnO3/F:SnO2 junctions are obtained at room temperature. Dramatically, the coexistence of two switchin…
The semi-solid slurry of A356 aluminum alloy was prepared through a serpentine pouring channel, which is a new method proposed recently for semi-solid forming process, and the effect of pouring temperature and bend number in the channel on the slurry microstructure was investigated and the slurry was finally rheo-die…
With growing interest in nanostructured thin films produced by glancing angle deposition (GLAD), it becomes increasingly important to understand their overall growth mechanics and nanocolumn structure. We present a new method of isolating the individual nanocolumns of GLAD films, facilitating automated measurement of…
Insulation has a significant role in most of power components failures. Therefore, proper diagnostics of insulation condition which can be done non-destructively and online in the field is of interest. In this paper, a new insulation diagnostic technique is proposed which utilizes natural transients in power system fo…
Abstract Herein, we report a strategy to fabricate a three-dimensional amorphous arrangement of gold nanoparticles from eccentric gold–polymer hybrid particles. The arrangement of the gold nanoparticles in the three-dimensional colloidal lattice of the hybrid particles was amorphous because of the disordered orientati…
Imaging and therapeutic applications of micro bubbles (MBs) in medical ultrasound are rapidly increasing. Despite the many theoretical and experimental investigations of MB dynamics, the MB behavior is considered to be very complex and difficult to control. The optimization of microbubble composition and ultrasound ex…
본 연구에서는 전기분해 처리된 해수의 유효염소농도와 온도에 의한 배가스 중 NO의 산화 특성을 실험적으로 살펴보았다. 실험은 무격막식 전해수가 채워진 버블링 반응기에 반응가스를 공급하여 NO 농도의 변화를 분석하였다. 폐순환 전기분해 시스템의 경우 정전류 조건에서 전해 시간이 길어질수록 전해수 내에 유효염소농도가 상승하였고, 전해수의 유효염소농도가 높을수록 NO가 $NO_2$ 로 산화되는 반응이 촉진됨을 확인하였다. 또한 동일한 유효염소농도를 가지는 전해수의 경우에도 온도가 높을수록 NO 산화율이 증가하였다. In this study, we investigated…
"Stereology allows shifting from the 3D distribution of the volumes of Poissonian Voronoi Diagrams to their 2D cross-sections. The basic assumption is that the 3D statistics of the volumes of the voids in the local Universe has a distribution function of the gamma-type. The standard rule of conversion from 3D volumes…
Different carbon nanofillers derived from carbon nanotubes and graphite were fabricated and characterized to investigate their effects on enhancement of polymer composites. It could be concluded that a better enhancement effect would be achieved when the nanofillers possessed a higher O/C ratio and more wrinkled surfa…
Al-doped ZnO (AZO) thin film is a promising alternative to an ITO electrode in organic light-emitting diodes applications due to its low price, non-toxicity and other promising properties. In this paper, AZO thin films of different thicknesses were deposited on glass substrates as transparent conducting films by sputt…
The paper discusses results of computer simulation connected with the double distortion during batch quenching of spur gears caused by a local film boiling between teeth. A carburized gear, outside diameter 2.5 in., was intensively quenched in conditions that provided heat transfer coefficient (HTC) equal to 25 000 Wm…
Abstract We report on the synthesis, single-crystal structures, and properties (IR, UV–vis, ESR, and TG) of a series of coordination polymers employing R4-terephthalate dianion (R4-benzenedicarboxylate dianion, R4-bdc2−: R = H, F, Cl, Br) in which halogen atoms are systematically changed and 4,4′-bipyridine (4,4′-bpy)…
We have studied the interlayer exchange coupling in Co2FeAl (CFA)/Cr/CFA/MgO multilayers via both experiments and numerical simulation. Magnetization measurement on the films shows a clear oscillation attenuation behavior with the thickness (0.6 nm < t < 10 nm) of the Cr spacer layer, and the oscillation period is abo…
The thermal conductivity of amorphous-oxide-coated silicon nanowires (SiNWs) was investigated based on Raman spectroscopy. Currently, it was complex and troublesome to measure the thermal conductivity of SiNWs. Therefore, to develop a new measurement technique for thermal characterization was necessary and urgent. SiN…
We propose an efficient concentrator of the magnetic component of evanescent field of light for measuring magnetic responses of nanostructures. It is in the form of a tapered fiber probe, which in its final part has corrugations along the angular dimension and is coated with metal except for the aperture at the tip. I…
The reaction of congeners of Sovol technical mixture of polychlorobiphenyls with polyethylene glycols was studied. Mixtures of hydroxy and mono(polyethylene glycol)oxy derivatives were obtained. The mixtures synthesized, which are of low hazard, were used as additives to industrial oil to improve its tribological char…
This paper deals with theoretical and experimental investigations on an innovative insulation material called syntactic foam. Syntactic foam is a composite dielectric consisting of a polymeric matrix with embedded hollow microspheres. The main focus of the present study is on the electrical breakdown process of syntac…