Materials Literature
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In this paper, we present our results for the anisotropic refractive index measurements of commonly used liquid crystal (LC) materials (E7 and 5CB) in the whole visible–near infrared range. In order to achieve a high accuracy in the obtained values, we have employed a combination of two techniques, namely, Mueller mat…
Since air quality is a major public health concern, especially in urban areas, the use of alternative fuels for vehicular applications has been strongly encouraged. Of these fuels, hydrogen is the only one that can produce zero emission through fuel cells. However, the storage of such a very light and highly combustib…
Polycrystalline, Neodymium doped, yttrium aluminum garnet Nd:YAG is a functional materials for solid-state lasers. The synthesis of Nd:YAG powders requires a strict control of the precursor reactivity and composition. Sol-gel citrate-based methods increase the chemical homogeneity and reactivity of the precursor powde…
This study reports on the deposition of nanometre thick siloxane coatings on a poly(ethylene terephthalate) (PET) film using a reel-to-reel atmospheric pressure plasma system. Coatings were deposited in a helium/oxygen plasma, from the siloxane precursors poly(dimethylsiloxane), tetraethylorthosilicate, octamethylcycl…
SrBi2(Ta1-xNbx)2O9(SBTN) ferroelectric ceramics with typical bismuth layered perovskite structure were synthesized with a reactive hot-press sintering process at 1000°C for 2h. The as-sintered SBTN (x=0.2, 0.4, 0.6, 0.8) materials had a maximum relative density of 95.97%. Bi-layered perovskite structure was obtained.…
A novel nano-material of carbon rod studded iron granules on its surface was prepared from needle coke with iron as catalyst by arc method in the vacuum condition. Its structure and composition was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectrosco…
Some copy-editing errors occurred in our January issue in the article “Efficient Characterization for Protein Crystals Using Confocal Raman Spectroscopy”, by Kohki Noda, Hidetoshi Sato, Shu Watanabe, Shigeyuki Yokoyama, and Hideo Tashiro, Appl. Spectrosc. 61, 11–18 (2007). We apologize for these errors. On page 13, an…
The amorphous nano-sized silicon nitride powders were sintered by liquid phase sintering method. Si3N4-Si2N2O composites were in-situ fabricated. The Si2N2O phase was generated by an in-situ reaction 2Si3N4(s)+1.5O2(g)=3Si2N2O(s)+N2(g). The content of Si2N2O phase up to 60% was obtained at a sintering temperature of 1…
The K, Ca, Sr and Ce doped and non-doped γ-NaxCo2O4 samples were prepared by the solid-state reaction method. Results show that the Na-site doping might lead to an increase in the Seebeck coefficient and a decrease in the electrical conductivity of the samples. The maximum power factors of the K, Ca and Sr doped sampl…
The ion migration testing used for DC porcelain support insulators was carried out in this paper. Ten rod samples for DC porcelain support insulators were subjected to a long-term ion migration testing in our laboratory in accordance with the reported procedure of IEC. The changes of Na+distribution along with the sam…
In the present work, a novel DC glow discharge source with configurations of hollow cathode electrodes had been developed. Discharge properties of the plasma source had been characterized. Experimental data indicated that the discharge current of the plasma source increased with the discharge voltage. The phase change…
Abstract A novel organic‐inorganic hybrid polyoxovanadate, [Ni(bpp) 2 ] 2 (V 4 O 12 ) (bpp=1,3‐bi‐4‐pyridylpropane), was hydrothermally synthesized from a mixture of NiCl 2 ·6H 2 O, NH 4 VO 3 , bpp, EtOH and H 2 O. The crystal structure consists of 2 ∞ [Ni(bpp) 2 ] 2+ , two‐dimensional networks interpenetrating perpen…
Tribological properties of nanostructural DLC/WC coatings were measured with a high temperature pin-on-disc CSM Tribometer in the range from room temperature (RT) up to 500 °C. The tribological performance was evaluated with respect to the wear rates of balls and coatings, friction coefficient and wear debris analysis…
This paper discusses the development of an ultrasound technique that enables the continuous, uninterrupted collection of time-resolved data for dissolution valency, interelectrode gap, and overpotential during electrochemical machining (ECM). These parameters, in combination with the dissolution current, give insight…
Abstract We have investigated the in vitro degradation of poly(lactic‐ co ‐glycolic) acid copolymer with a lactic to glycolic ratio of 65/35. The degradation studies were performed on solvent‐cast films of controlled thickness and shape. The samples were then incubated at 37 °C in phosphate buffered saline solution. T…
Abstract Effects of sodium hypophosphite (SHP) catalyst and water on nylon 612 melt‐phase polycondensation reactions were investigated using dynamic experiments with different catalyst levels (33, 113 and 249 ppm). The water concentration in the nylon melt was varied by altering the composition of a steam/nitrogen mix…
The conversion from one assembly structure to other composite assembly structures is valuable to both theoretical research and actual application in the nano/micromaterials science. In this paper, firstly, the flower-like calcium oxalate assembly structure was synthesized using a supramolecule template; then, through…
The silica-alumina sol bonding agent, prepared by the sol gel route from ethyl silicate and aluminium isopropanol, was characterized by X ray diffraction, infrared spectroscopy, thermogravimetric analysis, particle size distribution. It was utilized in the corundum based refractory castables. The properties and charac…
Intermetallic compounds capable of absorbing large amounts of hydrogen attract attention due to their applied significance in the production of chemical power sources. A variety of such compounds have been studied. The present paper gives some examples of hydrogen-absorbing intermetallides and describes their preparat…
Advanced composite materials and technologies, particularly direct manufacturing processes such as resin infusion are becoming the preferred manufacturing choice across the wind turbine industry. Philippe Christou, Technology Manager, EMEA, at Huntsman Advanced Materials looks at the latest developments.