Materials Literature
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Description Twenty-five peer-reviewed papers, written by experts in 14 countries, provide the latest global advances in bearing steel quality assurance. Sections cover: Review of Global Bearing Steel and the Rolling Bearing Industry—describes the impact of Swedish steel technology on bearing steel quality assurance. D…
Semiconducting oxide glass with composition 40V 2 O 5 -40Bi 2 O 3 -20ZnO is prepared by rapid quenching method. The glassy phase is confirmed from X-ray diffraction (XRD) pattern which shows a broad hump around 20 = 30°. The dc conductivity of the glass has been measured in the temperature range 300 - 600 K and compar…
The morphologies of brucite formed from MgO hydration under different curing conditions were studied. The results showed that there were relations between the morphologies of brucite and its forming conditions. The size of brucite crystals increased with the curing time, and they were fiber-shaped at lower curing temp…
Scientists and engineers who extensively use the term “nanomachine” are not always aware of the philosophical implications of this term. The purpose of this paper is to clarify the concept of nanomachine through a distinction between three major paradigms of machine. After a brief presentation of two well-known paradi…
The principles of complex phosphate crystallization in K 2 O-P 2 O 5 -TiO 2 -NiO solution melts are studied for the ratios K/P = 0.7−1.4, Ti/P = 0.15, and Ni/Ti = 0.1−2.0. The phase-formation field and parameters are determined for a new complex phosphate K 4 Ti 3 Ni(PO 4 ) 6 , which is isostructural to langbeinite. A…
The article discusses the effectiveness of high power ultrasound (HPU), its advantages over current technology and its benefits to the wine industry. It emphasizes that ultrasound can be applied to kill viable Brettanomyces/Dekkera bruxellensis yeast cells based on two laboratory studies. It mentions that HPU can be u…
The electrical resistance and Raman spectrum of α-boron were measured under high pressures. A logarithmic drop in the resistance and blackening of the color were observed under pressure; however, the temperature dependence of the resistance did not become metallic even at pressures up to 112 GPa. Clear bending in the…
We have synthesized and characterized gold nanoparticles (spheres and rods) with optical extinction bands within the “optical imaging window. ” The intense plasmon resonant driven absorption and scattering peaks of these nanoparticles make them suitable as contrast agents for optical imaging techniques. Further, we ha…
Three novel stable Pt(III) complexes with distorted octahedral structure and (dz2)1 ground state have been obtained in the course of Pt(II)-hematoporphyrin IX ((7,12-bis(1-hydroxyethyl)-3,8,13,17-tetramethyl-21H-23H-porphyn-2,18-dipropionic acid), Hp) interaction in alkaline aqueous medium and aerobic conditions. A re…
The lifetimes of non-equilibrium minority carriers, which bound with the diffusion length, are considered as two important parameters of the low-quality multicrystalline silicon (mc-Si) substrate. Its value defines the quality of the initial substrate. It is also subjected to change as a result of many high-temperatur…
A method is proposed to determine the eigenfrequencies of nanostructures (nanotubes and nanocrystals) by measuring the eigenfrequencies of a “large system” that comprises an array of vertically oriented similar nanotubes or nanocrystals equidistantly grown on a substrate. It is shown that the eigenfrequencies of a sin…
The process for the site-controlled formation of tunnel pits with high aspect ratios by anode etching of Al(100) foil is described. Introduction of a small amount of Cu on the Al foil, which has a patterned thin layer of polymers, initiated the uniform development of pits and generated the tunnel pits with sufficientl…
It was elucidated that treeing lifetime can be drastically extended especially under the condition of electric field as low as design field in epoxy/silica nanocomposites, if nano fillers are properly dispersed in good contact with surrounding polymer matrices. It was actually found that there is a distinctive differe…
Capsules based on sodium alginate (SA) and sodium cellulose sulphate (SCS), have been prepared using polyvinylamines (PVAm) of varying intrinsic viscosities. The resulting capsules are relatively dense in nature, revealing a bursting force which is four times that observed for the classical SA/SCS/polymethylene-co-gua…
In this study, mechanical properties of high density polyethylene (HDPE) and polypropylene (PP)-wood flour composite (WFC) decking boards were evaluated and the effect of maleated polypropylene (MAPP) as a coupling agent was investigated. Decking boards were manufactured using Davis-Standard® WT-94 WoodtruderTM. Flexu…
Compounds with the general formula were prepared by the citrate route for use in solid oxide fuel cells (SOFCs). A solid solution region containing hexagonal perovskite phase was formed when , in which the oxygen content in air changes from oxygen stoichiometry to oxygen excess with Mn doping. The temperature dependen…
A novel trisulfide‐containing thiophene, 1,5‐dihydrothieno[3,4‐e][1,2,3]trithiepine (5), and a disulfide analogue, 1,4‐dihydrothieno[3,4‐d][1,2]dithiine (4), were designed and synthesized. All the compounds were characterized by FT‐IR, NMR, Raman, MS, and elemental analysis, some of which were confirmed by single‐crys…
With the example of two isostructural poly(ether imides), the effects of isopropylidene and hexafluoroisopropylidene groups and hydrogen bonding with chloroform on changes in geometry and energy parameters of polymer chains have been analyzed. The relationship between changes in the geometry characteristics of polymer…
Polycationic water-soluble metallomacrocycles possessing 12 positive charges that facilitate ionic coordination with the carboxylate moieties of Oxi-SWNTs form a nanotube composite en route to tailored electronic properties. The multiple ionic pair interactions between the positively charged metallohexamers and carbox…
The angular distribution of desorbing N(2) was studied in both the thermal decomposition of N(2)O(a) on Rh(100) at 60-140 K and the steady-state NO (or N(2)O) + D(2) reaction on Rh(100) and Rh(110) at 280-900 K. In the former, N(2) desorption shows two peaks at around 85 and 110 K. At low N(2)O coverage, the desorptio…