Materials Literature
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Various glass samples were prepared in the system [(Pb x Sr1 − x )O · TiO2]-[2SiO2 · B2O3]-[K2O]-[BaO]-[Nb2O5] (0.5 ≤ x ≤ 1) by melt quench method. Donor dopant Nb2O5 has been found to play an important role in the crystallization of the parent glasses. X-ray diffraction studies indicated that perovskite lead titanate…
In this article, we report experimental studies on the effect of gold nanoparticle dispersion in a cholesteric liquid crystal matrix. Besides deeply affecting liquid crystal structural order upon inducing phase transition toward unexpected smectic-like phases, the presence of nanoparticles causes important changes in…
An X-ray diffraction study of ZnO crystals grown by the hydrothermal method has revealed reflections that give grounds to assign them to the sp. gr. P3 rather than to P63 mc. The distribution of Zn1, Zn2, O1, and O2 over structural positions, along with vacancies and incorporated zinc atoms, explains the dissymmetriza…
Silver nanoparticles (SNP) incorporated potassium oleate (KOL) soap by in situ reduction of silver nitrate by trisodium citrate (TSC) was described. Novel incorporation method of SNP into the natural rubber latex foam (NRLF) was successfully carried out by mixing 4 parts per hundred rubber (pphr) of SNP incorporated K…
As a result of our study, the temperature and temporal intervals of the appearance of sites of liquidphase sintering are determined and the qualitative variation of the TiNi phase in the sintered Ti-Ni reaction system is established. This is caused by the change in the nature of the TiNi phase upon going from the soli…
Abstract The glass–ceramic sealants developed at Forschungszentrum Juelich already meet several of the requirements for their potential use in SOFC stacks. The adequate choice of glass materials and adaptation of the joining and design parameters are essential for stack assembling. Successful long time operation of st…
The plasma reduction process for the production of reduced graphene oxide (rGO) requires precise process control in order to avoid the degradation of electrical characteristics. We report that the reduction status of the graphene oxides could be determined by monitoring the optical emission intensity at 844.6 nm. Prop…
ABSTRACT Natural rubber/multiwalled carbon nanotube (MWCNT) nanocomposites at loadings from 2 to 25 phr were prepared by ultrasonically aided extrusion at ultrasonic amplitudes up to 7.5 μm. Die pressure significantly decreased with an increase of ultrasonic amplitude, especially at higher loadings. Power consumption…
The electrochemical properties of layer-structured Hx(Ni1/3Co1/3Mn1/3)O2 were examined for the first time to evaluate its use as an electrode for an electrochemical capacitor in alkaline aqueous solutions. The protonated Hx(Ni1/3Co1/3Mn1/3)O2 (HNCM) was prepared by reacting Li(Ni1/3Co1/3Mn1/3)O2 (LNCM) with an HCl aqu…
Contamination at the surface of the insulator becomes a serious problem. Especially for the tropical area, humidity and rainfall play an important role in wetness by the water at the insulator surface, which result in the presence of contaminant and leakage current flowing at the surface. This leakage current will gen…
In this paper, the graphene layer is considered as the basic structural unit in a range of carbon materials. The effects of 2D and 3D order in defining the microstructures and macrostructures of carbons are reviewed along with the related concept of graphene layer orientation within the structure and the resulting rat…
Mesoporous carbons were synthesized using thermoplastic phenolic resin (PF) as carbonaceous precursor and magnesium citrate as template precursor. Pore structure was determined as ink-bottle-like geometry through TEM, N2 adsorption analysis combined with TG curves. The porous carbons prepared were then applied as elec…
The role of various structural features, namely basic scaffolds and substituents of small molecule inhibitors of the self-assembly of amyloid-beta (Aβ) peptide, a key process in Alzheimer’s disease, is described. The literature analysis in this update extends to the past 5 years, thus the past 15 year period is covere…
High order step wise functionally graded materials Al2O3-Ti are fabricated. These materials combine the high fracture toughness of Ti phase and the relatively low density of Al2O3 and stand for candidate materials for harsh mechanical and thermal environments. The techniques of powder technology are utilized to fabric…
Ultrasonic technology is widely used to assist many industrial and domestic applications. However, the effect of ultrasonic washing on the thermo-physiological properties of natural based fabrics has not been studied yet. This study aims to examine the relationship between unwashed, ultrasonically washed, and conventi…
The average size of particles of highly dispersed materials (Al 2 O 3 , TiO 2 , Y 2 O 3 ) is calculated from their specific surface areas. The latter is determined with the analysis of sorption capacity of materials with nitrogen at −196°C in the ranges of relative equilibrium pressures of 0.05–0.35 (the Brunauer-Emme…
This paper contains a solution of the problem of determining stress state in clay soil near a cylindrical and spherical cavities for the propagation of the moisture out of the cavity into the solid mass. The problem is solved in a stationary symmetric formulation taking into account changes the modulus of elasticity o…
Arrays of aligned carbon nanotubes (CNTs) were synthesized in a gas-phase flow reactor by thermal decomposition of reaction mixture (2% solution of ferrocene in toluene) on the surface of silicon substrates heated to 800°C. Variation of the height of the CNT array as a function of position of the substrate in the reac…
This study is an essential complement and extension to the stress-gradient concept recently proposed by Hirth. An analytic method is presented for studying the behaviour of double-ended dislocation pileup in the presence of various stress gradients by solving a singular integral equation based on the continuous approx…
Epoxy resin based double layer absorbing coatings were prepared, employing carbonyl iron and carbon black as original absorbents in the matching layer and absorbing layer respectively. Carbon fibre powders (CFPs) were introduced as additional absorbent in the two layers. The absorbers were tested to investigate their…