Materials Literature
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White light emitting mesoporous carbon-silica (MPCS) was synthesized by serially adding triblock copolymer (Pluronic, F127), ethanol (EtOH), tetraethoxysilane (TEOS), hydrochloric acid aqueous (HCl) and phenol-formaldehyde resin (resol) followed by the heat treatments of carbonization and oxidation. The PL intensity o…
Impedance measurements are widely used to characterize the behavior of n-windings magnetic components. The identification process is realized manually and becomes more and more difficult as the number of equivalent circuit parameters increases. This paper deals with an automatic identification method based on Rational…
The phenolic(PF) foams were prepared used low-temperature foaming and curing method. The optimum low-temperature foaming processing technology conditions and material proportioning were described below. The curing temperature was 40 °C, the amount of foaming agent iso-pentane was 8-10wt.%, tween-80 dosage was 6-7wt.%,…
The influence of chemical passivation process on physical and chemical characteristics of samples made of X2CrNiMo 17-7-2 steel with differentiated hardening, in the solution simulating the environment of human urine was analysed in the study. Wire obtained in cold drawing process is used for the production of stents…
The sorption properties of SBA-15 and MCM-41 for toluene and ethyl acetate were investigated by temperature programmed desorption (TPD) techniques and an analysis of breakthrough curves. The amount of toluene adsorbed onto SBA-15 was distinctly larger than that onto MCM-41, while the desorption temperature of toluene…
The upsetting of a continuous steel cylinder with flat dies was studied experimentally and theoretically to evaluate the material parameter contained in the differential equation for the thickness of the layer of intense plastic deformation.
The chiral drug methocarbamol, which is prone to spontaneous resolution, is an effective molecular hydrogelator as both an enantiomer and a racemate; the samples of methocarbamol having an intermediate enantiomeric composition generate clearly visible periodic structures (Liesegang rings) during the gelation process.
Due to low density and good strength properties, magnesium alloys are increasingly used as a structural material They are used, amongst others, for large-size castings in sand moulds, pressure and precision castings. Welding and pad welding is used to repair casting defects, such as misruns, micro-shrinkage, cracks, e…
Although PCM presents good scaling properties, multilevel storage may be required to increase bit density and reduce the cost per bit. The aim of this paper is to evaluate the impact of different phase change (PC) materials based on GST and GeTe on the feasibility of partial-RESET multilevel programming in self-heatin…
Polyvinylidene fluoride (PVDF) is a polymer of industrial importance, mainly due to its piezoelectric and pyroelectric properties. A comprehensive study of the normal modes and their dispersion in PVDF (β-form) has been reported in the reduced zone scheme using Wilson’s GF matrix method as modified by Higgs. A Urey-Br…
Catalytic wet air oxidation of Basic Yellow 11 (BY11), a basic dye, was studied in a batch reactor. Layered double hydroxides with the hydrotalcite-like structure containing nickel or iron cations have been prepared by coprecipitation and subsequently calcined leading to Ni- and Fe-doped mixed oxides, respectively. Co…
Electrospinning is a very promising nanotechnology method, mostly thanks to industrial scale up ability, relatively low purchase cost, and huge variability. Nevertheless, its principal disadvantage is the way in which the individual nanofibers are randomly deposited while being collected onto a collector after passing…
Ceramic solid solutions Bi4MnxV2–xO11–(x/2)–δ in the composition range 0.07 ≤ x ≤ 0.30 were obtained by solid state synthesis. Structural investigations were carried out by using a combination of FT-IR and powder X-ray diffraction technique. Polymorphic transitions (β↔γ and γ′↔γ) were detected by DTA and variation in…
In this work we present a complete characterization and magnetic study of vanadium oxide/hexadecylamine nanotubes (VOx/Hexa NT’s) doped with Co2+ and Ni2+ ions. The morphology of the NT’s has been characterized by transmission electron microscopy, while the metallic elements have been quantified by the instrumental ne…
The advantages of solid oxide fuel cells (SOFCs), compared with other types of fuel cells, include their high energy conversion efficiency and their utilization of hydrocarbon fuels without reformers. Although conventional Ni-based cermet anodes have commonly been used as an anode material with high catalytic properti…
Metallic carbon nanotube (CNT) interconnect has been regarded as a competitive candidate for next generation of interconnect. The equivalent circuit models of CNTs are investigated in this paper. Based on these models, the performance of CNT interconnects is predicted in comparison with Cu wire counterpart. Further, c…
The stability of the B and N atomic vacancies and divacancies in an h-BN monolayer deformed by 2 and 4% along one of the axes has been investigated. It has been established that the N atomic vacancies are most stable; their concentration is insignificant and does not affect the properties of white graphene. The number…
The rice husk powder was modified by polymer (lactic acid) (PLA) and Maleic anhydride (coupling agent, MAPP). Composite material was prepared in the way of melt blending. The mechanical properties, water absorbability of rice husk/polymer (lactic acid) (PLA) composites, and the relations between these properties and m…
Linear correlation is established in glasses between the Grüneisen parameter and the ratio of propagation velocities of the longitudinal and transverse acoustic waves. An interpretation is given within the Pineda-Kuz’menko model to the relation between the harmonic and anharmonic quantities.
In this work, the properties of Mg1-xZnxO thin films are investigated as an example of a protective layer material with a small bandgap in a plasma display panel, to analyze the impact of these kinds of materials on the discharge properties. Using the first principles calculation method, the electronic structure of Mg…