Materials Literature
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The influence of filler loading of polyaniline (PANI) and carbon black (CB) on the nonlinear electrical properties as well as the mechanical properties (tensile strength and Young's modulus) of ethylene propylene diene monomer (EPDM) was investigated. It has been found that low field conductivity was most sensitive to…
Methods of enhancing of mechanical properties of ceramic-metal composites, particularly fracture toughness by introducing dispersed metal particles such as W, Mo, Ni, Al, etc to a ceramic matrix are well known. However, the dependence of the microstructures, especially interfaces, on the properties of composites is no…
The composition, stability, existence ranges, and degrees of accumulation of iron complexes in solutions of formic, acetic, propionic, butyric, and valeric acids have been determined with the use of the oxidation function and suggested principle of equilibrium modeling from the experimental data obtained by the oxidat…
Abstract The crystal structure of a Te-rich polybasite has been refined by means of X-ray diffraction data collected at room temperature (space group P m 1; R = 0.0505 for 964 observed reflections and 94 parameters; refined formula Ag 14.46 Cu 1.54 Sb 1.58 As 0.42 S 9.67 Te 1.33 ). The structure comprises stacking of…
In this article we investigate the ultimate scaling potential of multilayer MoS2field effect transistors (FETs) with channel lengths ranging from 1μm down to 50nm using a 20nm thick SiO2back gate and scandium as the source/drain metal contacts. We also report, for the first time, the in-plane dielectric constant for m…
A new closed-form expression is presented for estimating the real-in-line transmission of ceramics consisting of non-absorbing phases in dependence of the inclusion or pore size. The classic approximations to the exact Mie solution of the scattering problem for spheres are recalled (Rayleigh, Fraunhofer, Rayleigh-Gans…
Longevity of entrapped air is an outstanding problem for using superhydrophobic coatings in submersible applications. Under pressure and flowing water, the air micropockets eventually dissolve into the ambient water or burst and diminish. Herein, we analyze from first principles a simple mass transfer problem. We intr…
The paper presents comparative inclined plane test results of high temperature vulcanized silicone rubber and EPDM elastomers filled with alumina trihydrate to 25 wt% under DC. Both the initial tracking voltage and the constant voltage test methods are employed to evaluate the relative tracking/erosion resistance of b…
The purpose of this paper is to establish a dynamic ultracapacitor model which consists of an equivalent circuit model with voltage and temperature effects on its parameters and a thermal model. Identification of parameters in the equivalent circuit model is conducted by alternative current impedance spectroscopy (ACI…
Soft-landing ion mobility has been applied to the development of a reusable surface-enhanced Raman spectroscopic substrate. Sections of silicon wafers were cleaved and modified with 3-(mercaptopropyl) triethoxysilane. After modification, gold was deposited using a soft-landing ion mobility system at thermal kinetic en…
The tunneling photoeffect (PE) has been studied in a microdiode with an electrostatic field localized at an emitter based on a nanodimensional carbon structure. It is established that, when the carbon nanoemitter is exposed to laser and LED radiation photons of low energy (below work function) in the spectral range fr…
Electrospinning technique has been well known for its facile production of one-dimensional (1D) continuous fibrous structure. With the advantage of simple setup and scalable capability using this technology, electrospun carbon nanofiber has raised great interest in recent years due to its superior conductive potential…
The performance of Mo-doped Ni/Al 2 O 3 catalyst for dry reforming of C 3 H 8 has been studied in a fixed-bed reactor at 0.1 MPa and 923 K. H 2 and CO formation rates as well as CO 2 consumption rate all increased with C 3 H 8 partial pressure attaining a maximum (at P C 3 H 8 = 25 kPa) before the decline at higher va…
The electrospinning technique is a method used to produce nano and microfibers using the influence of electrostatic forces. Porous three dimensional networks of continuous and interconnected fibers as scaffolds were obtained from a poly (lactic acid) solution. The concentration of the polymeric solution, 12.5% m/w, as…
Abstract Nano layers of zinc, which were deposited by magnetron sputtering on Si (100) substrate, thermal oxidation exposed to the air at 400 °C, were employed to produce ZnO thin films. In order to study the influence of the deposition rate on surface morphology, samples with different deposition rates (1.2–4.5 nm/s)…
This paper focuses on the thermal and mechanical behavior of fiber-reinforced bio-epoxy materials in which the bio-content has been varied from 0 up to 100 %. Assorted formulations based on standard epoxy resin and epoxidized plant oil with varying bio-hardeners in differing matrix formulations, filler contents and fi…
The effect of reactive alumina and its different proportions on physico-mechanical properties of conventional high alumina castables were studied. The castables with different percentages of reactive alumina were prepared by using calcium aluminate cement as a binder and various refractory properties of the prepared c…
In this paper, simultaneous estimation of state-of-charge (SOC) and temperature is achieved by applying extended Kalman filter (EKF) algorithm with only the terminal measurement of voltage and current. For the application of EKF algorithm, a nonlinear model which consists of a voltage-and-thermal-dependent equivalent…
In this paper we explore modelling and regulation techniques for temperature and crystal growth control in an industrially important process of Czochralski crystal growth. First, a geometrical model for both crystal growth and radius evolution dynamics is developed and a controller is designed based on an input-output…
The study and comparative analysis of spectral-luminescent characteristics (absorption and fluorescence spectra), of quantum yield, and fluorescence life time in solutions, of lability in proton-donor media, solid phase thermal stability in air oxygen and argon was carried out for binuclear zinc(II) helicates with dec…