Materials Literature
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To fully evaluate the usability of a raw Ca-bentonite source and to deeply understand the property of bentonite mineral are critical for applications of these special layered materials. Due to sodium bentonites have several advantages over calcium bentonites, especially in expansibility, cation exchange capacity, cohe…
This work focuses on the preparation of base polyurethane matrix composite materials by (Hand Lay-Up) method, and studying the effect of selected weight fractions (2, 4, 6, 8, and 10) % wt of (coconut shell powder) particles on some properties of the prepared composite. Some mechanical tests were used to evaluate the…
Liquid insulation plays a significant role in the design and operation of power system. There is good evidence in the literature that the addition of nanoparticles to conventional transformer oils can lead to significant increases both in electrical and thermal characteristics. In this paper, spherical BN nanoparticle…
La1.5Sr0.5NiO4is well known as a dielectric material that has a colossal permittivity (up to 107) and a weak paramagnet at room temperature. The permeability is about 1.005, which is just slightly larger than that of air. The weak magnetic moment together with the huge imbalance between permittivity and permeability s…
We present a detailed analysis of the bias-temperature instability (BTI) of single-layer graphene field-effect transistors (GFETs). We demonstrate that the dynamics can be systematically studied when the degradation is expressed in terms of a Dirac point voltage shift. Under these prerequisites it is possible to under…
In a concerted effort, the Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB) and the Max Planck Society (MPG) will develop, install, and operate EMIL, the Energy Materials In situ Laboratory, which will be a unique facility at the BESSY II synchrotron light source in Berlin, Germany. EMIL will be dedicat…
UNLABELLED: An idea of using a suitable drying method to minimize the loss of added antimicrobial agent and, at the same time, to modify the structure, and hence the release characteristics of chitosan films was proposed. Chitosan film-forming solution was incorporated with galangal extract (0% and 1.5% w/w) and forme…
Luminescent materials suitably embedded into the architecture of photovoltaic (PV) modules can increase the short-wavelength response, and thus efficiency, of nearly all inproduction PV technologies. At the same time, visible-wavelength luminescence that escapes the modules due to its omnidirectional nature is perceiv…
Over the last several decades, lifetime models for crosslinked polyethylene based insulations have been developed based on the combined effects of aging under thermal and electrical stresses. Several of these models include a threshold electrical stress below which no aging occurs, though other modes of aging such as…
Abstract This paper presents the results of an investigation to assess the validity of producing high strength concrete (HSC) using moderate cement content to reduce the consumption of the binders. Cement content is lowered from 500 kg/m 3 to 400 kg/m 3 . The difference in cement content is compensated by the addition…
The electrochemical behavior of PEDOT/Ag composite films obtained by chemical deposition of ultrafine Ag particles into the poly-3,4-ethylenedioxythiophene (PEDOT) matrix was studied. The film morphology was characterized by transmission electron microscopy (TEM). The changes in the mass of the films during the chemic…
This work aimed to evaluate the physical and mechanical properties of particleboard panels manufactured with wood particles from Sequoia sempervirens and Pinus taeda and urea-formaldehyde resin (UF), using different mixing ratios of the two species, namely 100%, 0%, 75%, 50% and 25% of sequoia particles. Properties ev…
Corrosion and scaling are the common problems to all the industries. A remedy of these problems was sought out through chemical treatment: indigenously available raw materials including thiourea, surfactants (cationic, anionic and nonionic containing pre, critical and post micellar concentration). Evaluation of corros…
Magnetic microbubbles are a relatively recent development with the potential to greatly improve the efficacy of the minimally invasive drug-delivery procedure sonoporation. However, very little is known about the dynamics of magnetic microbubbles, in general. In this paper, a novel mathematical model and numerical met…
Zero-phonon lines of a pair center of Mn4+ ions are observed in the luminescence and luminescence-excitation spectra of SrTiO3:Mn crystal. Based on the experimental data, the energy-level structure of the ground state ∣4 A 2g ,4 A 2g 〉 and excited state ∣4 A 2g ,2 E g 〉 of the Mn4+-Mn4+ pair center is constructed. It…
Inspired by the fog-harvesting behavior of the cactus, a novel fog collector is fabricated on a large scale by K. Liu and co-workers through integrating hydrophobic cone arrays with a hydrophilic matrix. This can spontaneously and continuously collect, transport, and preserve fog water. This facile approach offers new…
Theoretical investigations to study the effect of doping of hetero-atoms on the growth and field emission properties of Carbon Nanotubes (CNTs) tip placed over a cylindrical surface in complex plasma have been carried out. A theoretical model incorporating kinetics of plasma species such as electron, ions, and neutral…
The paper presents two identification methods of parameters for the Johnson-Cook constitutive equation. The Johnson-Cook equation is one of the most popular semi-empirical constitutive models to describe the equivalent of plastic stress-strain curves. The first presented method is the approximation method of plastic h…
We have studied IR transmittance spectra of a multiferroic TbMnO3. Three phase transitions (T N = 43 K, T FE = 28 K, and T Tb = 7 K), which manifest themselves in a shift of the absorption band edge of manganese and in changes in the spectral parameters of lines of f-f transitions of terbium, have been detected. An in…
Modern optical partial discharge (PD) detection system based on fiber-optic sensors for PD on-line health monitoring in high-voltage (HV) cable terminations necessarily requires optically transparent or translucent insulation materials. The optically compatible silicone rubbers are the key to facilitate such innovativ…