Materials Literature
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A simple one-dimensional account of space charge in an anode-cathode (AK) gap is based on a transit time model. Two limiting cases are treated: thermionic and field emission. Each case is compared to experimental thermionic and field emission data in the literature and the correspondence is shown to be good.
A new photochromic diarylethene compound, 1-(2,5-dimethyl-3-thiophene)-2-[5-(4-pyridine)-2-methyl-3-thienyl]perfluorocyclopentene(1a) was synthesized. its photochromic and fluorescent properties have been investigated in detail. The results of the research showed that it has shown good photochromic behavior and fluore…
Nanostructured ZnO films are hydrophobic. The effects of oxygen plasma treatment on the wetting properties of the ZnO film surfaces were studied. The oxygen plasma treatment makes the nanostructured ZnO films superhydrophilic and helps to enhance the absorption of the dye molecules on the nanostructured film.
Analcime samples were studied with the aim of cleaning air from phenol.
Leakage currents of inter level carbon-doped silicon oxide low-k dielectric in copper interconnect structure are investigated over the electric field range of zero to the breakdown field at different temperatures. A remarkable bias polarity dependence of conduction current and breakdown voltage is observed in such str…
This paper discussed on the research of fatigue strength test of 20CrMnMo carburized and quenched gears. This test is done through a fatigue machine of high-frequency electromagnetic resonant with pulse double-tooth loading. In the short-life area, give four levels of constant stress group test; in the long-life area,…
a-plane GaN on r-plane sapphire substrates suffers from high density defects and rough surfaces. To obtain pit-free a-plane GaN by metal-organic chemical vapor deposition, we intentionally grew high-temperature (HT) 3-dimensional (3D) GaN buffer layers on a GaN nucleation layer. The effects of the HT 3D GaN buffer lay…
Abstract This paper reports on the synthesis, characterization and electrochemical performance of LiV3O8 nanorods which were prepared through a very facile hydrothermal route. The diameters of the LiV3O8 nanorods are about 150 nm. The morphology of LiV3O8 can be controlled by adjusting the reaction conditions such as…
The addition of sulfenyl chlorides of metal acetylacetonates to octavinylsilsesquioxane was studied. The addition was shown to proceed at four of the eight vinyl groups of the octavinylsilsesquioxane, without the formation of cross-linked polymers. This allowed us to synthesize with high yields new non-functianalized…
A new unsymmetrical photochromic diarylethene, 1-(2,5-dimethyl-3-thienyl)-2-(2 -methyl-5-p-tolyl-3-thienyl)perfluorocyclopentene (1) was synthesized, and its photochromic and fluorescence properties were investigated. The results showed the compound exhibited good photochromism in hexane solution and in PMMA amorphous…
Abstract In the 1980’s the dosimetry community embraced the need for a high fidelity quantification of uncertainty in nuclear data used for dosimetry applications. This led to the adoption of energy-dependent covariance matrices as the accepted manner of quantifying the uncertainty data. The trend for the dosimetry co…
Raman and photoluminescence (PL) spectra of HiPCO and CoMoCat single-walled carbon nanotubes (SWCNTs) dispersed in 1 wt% aqueous surfactant solutions with five different surfactants were studied. The SWCNT suspensions exhibit almost the same Raman spectra, regardless of the surfactant used, but the PL peak positions o…
Nanocrystalline diamond films were grown by hot filament chemical vapour deposition (HFCVD) in a mixture of methane and hydrogen gases. Three straight parallel wires filament configuration were used in the HFCVD system for the deposition of the films studied in this work. The deposition pressure for the growth of diam…
In the present study the effects of metal oxide nanoparticles addition on the microstructure, physical properties of the HA ceramics were investigated. Many techniques were used for the analysis. X-ray diffraction analysis revealed a co-exist phases between hydroxyapatite and tricalcium phosphate in the sintered sampl…
YAG is widely applied as the structure materials and the functional materials because of some excellent performances in the chemistry. The pure superfine YAG powder materials are prepared via the co-precipitation method after calcining the precursor of YAG at 1100°C. The superfine YAG powders has the better dispersion…
The property and microstructure of rolled non-quenched and tempered steels of Nb-V comprehensive micro alloying have been investigated .The mechanical properties and the load –displacement curves were measured respectively by using electron tension test machine and digital-impact test machine . The microstructure and…
Clean energy production and its efficient usage is one of the most important issues in the world today. Thermoelectric materials, which can convert heat into electricity, have drawn significant attention for waste-heat harvesting. In this report, FeSi2and SiGe thermoelectric materials were used to make a new composite…
In this article, morphology, IR and single fiber strength of cooling-mica fiber, and single yarn strength, yarn hairiness, twist, yarn evenness, resisting acid and alkali have been studied and tested.
Polyvinyl alcohol(PVA) modified by SiO2/poly 2-acrylamido 2-methylpropane sulfonic acid (PAMPS) electrolyte membrane (SiO2/PVA-PAMPS ) was prepared by a Sol-gel synthesis in situ technique for DMFC. The influence of the different ratio of AMPS and SiCl4 on the proton conductivity and methanol permeability of these mem…
In this work, comparative rheological tests on binders and mechanical tests for unmodified and modified asphalt with a nanocomposite (CdS–polymethylmethyacrylate [PMMA]) were carried out, and the physical and mechanical properties of asphalt were studied. Asphalt (60/70) and binders were modified with a CdS–PMMA nanoc…