Materials Literature
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Depth profiling of strain and carrier concentration by cleaved surface scanning of GaN Gunn-diode: confocal Raman microscopy, Belyaev, A E, Strelchuk, V V, Nikolenko, A S, Romanyuk, A S, Mazur, Yu I, Ware, M E, DeCuir, E A, Salamo, G J
In this chapter, fuel cells, particularly solid oxide fuel cells (SOFC), are introduced in detail. The main reactions, benefits, challenges, and application examples of low and high temperature fuel cells are discussed and compared. SOFCs are also classified according to their temperature levels, cell and stack design…
Aluminum hydroxide as a coating layer of (4mm) thickness was used to increase the fire retardancy for advanced composite material consist of polyvinyl chloride (PVC) reinforced by carbon fibers .The resultant composite was exposed to a direct gas torch flame with flame exposure intervals 10,15,20mm, and study the rang…
Grain size distributions of less than 100 nm wide Cu interconnects made by DC electroplating have been evaluated by the X-ray diffraction method. The mean grain size of the annealed Cu interconnects was found to be expressed as a linear function of the product of the overburden Cu film thickness times the ratio of the…
Controlling thin film formation is technologically challenging. The knowledge of physical properties of the film and of the atoms in the surface vicinity can help improve control over the film growth. We investigate the use of the well-established selective reflection technique to probe the thin film during its growth…
The high-quality MCM-41 was synthesized from silica fume with Citric acid and cetyltrimethylammonium bromide (CTAB) as template agents. Silica fume entered into liquid system in silicate and matched with CTA+. Mesoporous phase formed with the help of Citric and PEG-6000 in an acidic process followed. The structure and…
A modified melt spinning apparatus with a high-speed air nozzle was designed and fabricated to produce continuous polypropylene fibers by cold air drawing only. The experimental studies based on this novel process were described in Part I of this paper series. In this succeeding paper, a one-dimensional non-isothermal…
A series of sulfonated polyphosphazene-organic montmorillonite hybrid membranes for direct methanol fuel cells (DMFCs) were prepared. The structure and characteristics of the obtained membranes were studied by testing their X-ray diffraction (XRD), water uptake, water swelling ratio, proton conductivity, thermal prope…
The article deals with the evaluation of wood chips moisture and compares two methods of moisture determining. The problem of moisture determining consists mainly in selecting a suitable method according to the estimation of content of water in wood chips. Another factor to be considered is the fact that moisture in w…
Using a high internal phase emulsion templating approach, highly porous open cellular polymers are prepared from divinyl adipate (DVA). The morphological structure of the monoliths includes cavities in the diameter range of around 5–25 μm and secondary interconnecting pores approximately 1 μm in diameter. A high inter…
Poly (vinylidene fluoride) (PVDF) hollow fiber membranes were successfully prepared using DMAc/γ-BL as the mixed diluent and PEG as the additive through modified thermally induced phase separation (M-TIPS) process. The membranes prepared were characterized by scanning electron microscope. Their properties such as wate…
PURPOSES: The liquid-type chemical warm-mix asphalt (WMA) additive has been developed. This study evaluates the basic properties of the additive and the mechanical properties of WMA asphalt and mixture manufactured by using the newly developed chemical additive. METHODS: First, the newly developed WMA additive was app…
The hydrolysis reaction of sodium borohydride (NaBH4) can generate highly pure hydrogen. In this paper, the Co-La-B catalyst is prepared using the simple chemical reduction method. Its catalytic reactivity is studied for different NaBH4 concentrations, NaOH concentrations, the catalyst amounts and the reacting tempera…
Due to the characteristics of the oilfield produced water, there are serious problems of corrosion and scale formation in the water recycling process. A compound inhibitor consists of organophosphine inhibitors and zinc sulfate, was applied to prevent corrosion and scale formation. The corrosion rate and scale inhibit…
MnO2/C composites were synthesized in a microwave oven using the activated carbon as a carrier, manganese sulfate as manganese source, ammonium persulfate as an oxidant, ammonium sulfate as conductive agent. The effects of activated carbon and ammonium sulfate concentration on the MnO2/C composite crystalstructure and…
Abstract ReVIIO2(PO4) and (ReVII2O5)Sio2[Sit2O(PO4)6] were obtained from Re2O7 and P4O10 in sealed silica tubes (250 ≤ ϑ ≤ 400 °C). The crystal structures were solved and refined from X‐ray single crystal data (ReVIIO2(PO4): C2/c, Z = 24, a = 14.403(1) Å, b = 8.414(1) Å, c = 20.647(3) Å, β = 93.165(8)°, T = 123 K, 103…
Molecular dynamics simulations based on the shell model potential for PbTiO3 were carried out to investigate the effect of the cell dimension, temperature and kink structure on the domain switching of 90? ferroelectric domain walls. It was found that the critical shear stress is linearly dependent on the inverse of th…
A composite of AgIn5S8/AgInS2 was prepared in aqueous solution by a simple low temperature process using mercaptoacetic acid as capping agent and thioacetamide as sulfur source. The composite was characterized by Xray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. The obtained AgIn5S8/…
Brannerite-type Li[VMoO6] has been synthesized by a solid state reaction route. The V and Mo atoms statistically occupy the same site with mirror symmetry and are octa-hedrally surrounded by O atoms. The framework is two-dimensional and is built up from edge-sharing (V,Mo)O6 octa-hedra forming (VMoO6)∞ layers that run…
Potassium feldspar, phosphogypsum and coke are used as raw materials to obtain soluble salts of calcined sample through mechanical grinding, roasting activation and leaching with acid. A study has been conducted on the factors that affect the leaching ratio of K2O of calcined samples, such as the type and concentratio…