Materials Literature
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The effect of p O 2 on the electrical conductivity of La 0.5 Sr 0.5 Ga 0.2 Fe 0.8 O 3 − δ was investigated at 750 ≤ T ≤ 1050 ° C and 10 − 17 ≤ p O 2 ≤ 0.5 atm . At T ≤ 850 ° C , a discontinuity, i.e., a plateau and a steep slope, was observed in the intermediate p O 2 region, indicating that a phase separation occurre…
Blue-purple to red-emitting phosphors, : , , : , and : were prepared by a solid state reaction under a weak reducing atmosphere and examined using photoluminescence, activator energy transfer and concentration quenching processes. The results showed that : , , : , and : can be excited efficiently by UV-visible light a…
The goal of the metallurgist is to design a process that will produce a structure that will yield the expected mechanical properties. The quality of the final product depends on the mechanisms of defect formation and
A conducting composite of poly(o-anisidine), poly(o-toluidine) and poly(o-anisidine-co-o-toluidine) using incorporation of TiO2 and SiO2 was prepared by electrochemical polymerization. The films were electropolymerized in solution containing 0.1 M monomer(s), 1 M sulphuric acid as supporting electrolyte and 10–5 M TiO…
Silver nano-films were prepared by thermal evaporation. Scanning electron microscope observations showed that the silver films have nano-structures in morphology. The optical properties of silver nano-structures were obtained by ultraviolet-visible spectrometry, which shows the resonance wavelength of surface plasmon.…
Wood-plastic composites (WPCs) have been gaining market share in residential construction applications such as lumber for decking, roof tiles, and siding. The durability of these materials in exterior environments is just beginning to be understood. Current research suggests that controlling moisture absorption by the…
In this study, poly (ethylene terephthalate) PET POY, with 140 dtex 36 f and 295 dtex 36 f, were used for the production textured yarns of 83 dtex 36 f and 167 dtex 36 f. The yarn were textured at a first heater temperature of 175 °C, 190 °C and 205 °C set in both false-twist texturing machines, the Muratec 33 H (Belt…
Ti50Ni25−XPd25−YCuX+Y high temperature shape memory alloys (HTSMAs) with X, Y≤10 at% have been studied by DSC, XRD, TEM/EDS, hardness and cold-rolling workability tests. Experimental results show that all these HTSMAs exhibit B2 ↔ B19 martensitic transformation with Ms temperature can be predicted by the linear regres…
The crystal structures of five long-chain n-alkylammonium bromide monohydrates, with carbon chain lengths ranging from 13 to 18, were determined. n-Tridecylammonium bromide monohydrate 1, n-tetradecylammonium bromide monohydrate 2, n-pentadecylammonium bromide monohydrate 3, n-hexadecylammonium bromide monohydrate 4,…
The mechanical response of rod-coil block copolymers is critical to their processing and application in organic electronic devices and biotechnology. Using the weakly-segregated system poly(2,5-di(2′-ethylhexyloxy)-1,4-phenylenevinylene-b-isoprene) (PPV-b-PI), the shear behavior of a rod-coil block copolymer system wa…
The bioceramic shell of the Eastern oyster was investigated to determine its physical and chemical compositions. Resistance and electrolyte conductivity measurements through the shell using a four-electrode cell configuration were made. The scanning electron microscopy/energy-dispersive spectroscopy analysis of oyster…
Thin (BFO) films with a thickness of 80 nm were grown on substrates at with and without a 100 nm thick (LNO) buffer. The growth of the BFO film with an LNO buffer promotes the appearance of highly (100)-crystallographic features. A high deposition temperature of yields BFO films with secondary phases. Secondary-ion ma…
Novel poly(methyl methacrylate)s substituted with photochromic diarylethenes as the main backbone or pendant functional groups were prepared by atom transfer radical polymerization (ATRP), using methyl methacrylate and 5,5′-dihydroxymethyl substituted dithienylethene as the monomers. The concentration of diarylethene…
Cell damage caused by redox cycling in which the anode is electrochemically oxidized was investigated in order to detect the initial damage before cell failure. In order to prevent catastrophic destruction of the cell, partial electrochemical oxidation was used in the redox treatment and controlled at a very low degre…
This paper presents a realization of composite right/left handed transmission lines using coupled microstrip lines. This structure exploits the advantages of the microstrip lines, while increases the coupling by a ∞oating conductor at the ground plane. The performance of this composite right/left-handed line is demons…
Purpose: Ureilites are a rare type of meteorites containing tiny diamond grains. In our research we used two ureilites: NWA 3140 and DaG 868. The aim of this paper is to show the non-uniformity of carbon in ureilites, especially differences of ureilitic diamonds. Design/methodology/approach: One of the best methods to…
Purpose: During the last 20 years DLC (diamond-like carbon) layers became a very attractive material in many medical and engineering applications. While the layer’s stress and adhesion were always a concern, several adhesion improvement methods have been proposed. A majority of those methods consists of either the dep…
The continued miniaturization of silicon-based electronic circuits is fast approaching its physical limitations. It is unlikely that advances in miniaturization, following the so-called Moore's Law, can continue in the foreseeable future. Nanoelectronics has to go beyond silicon technology. New device paradigms based…
Photoluminescence characterization on CdNb 2 O 6 oxides by the solid state reaction were investigated in this work. The products were characterized by X-ray diffraction, scanning electron microscopy, photoluminescence spectroscopy and absorption spectra. The excitation wavelengths at 272 and 330 nm, were associated wi…
Metals have a variety of behaviors when deposited onto diblock copolymer films, in particular, poly(styrene-b-methylmethacrylate). Silver is known to form nanowires, whereas gold forms ellipsoidal nanoparticles of different sizes on each of the blocks, and chromium creates a uniform film on PS-b-PMMA. We show that wit…