Materials Literature
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The first BEDT-TTF charge transfer salt in which alternating electron-donor layers possess alpha- and kappa-type packing motifs has been synthesized. The crystal structure and physical properties of the organic conductor alpha-kappa-(BEDT-TTF)2Hg(SCN)3 are described, including a detailed description of its optical pro…
The synthesis, structure and characterization of the [{Fe3(CO)9(micro3-O)}2H]3- trianion in its [Cs(THF)0.33]+ and [NEt4]+ salt are reported. The title dimeric cluster has been obtained by protonation in water or in organic solvent of the [Fe3(CO)9(micro3-O)]2- dianion to the hydroxo [Fe3(CO)9(micro3-OH)]- derivative…
Nanocrystalline CaWO4 has been synthesized by a sol-gel method using tungsten (VI) oxide, WO3, and calcium nitrate tetrahydrate, Ca(NO3)2•4H2O as starting materials.The synthesis leads to a sol-gel process when citric or tartaric acids are introduced into the solution obtained by dissolving WO3 in ammonia.Citric and t…
The free dendrite growth of iron has been investigated using a three-dimensional phase-field model with thin-interface-limit parameters. The stability parameters are determined for different values of anisotropy intensity of interface energy, and the obtained values are in good agreement with previously reported value…
In this paper, a new sterilization method using cavitating flow is presented. Water with bacteria was pressurized up to 105 MPa and flushed out through two very small nozzles 0.1-0.31 mm in diameter, where a cavitating jet was generated containing bubbles that collapsed downstream. First, the effects of jet velocity a…
Cytocompatibility of nickel-free Ti-Mo-Al shape memory alloys was evaluated and compared with that of a conventional Ti-Ni shape memory alloy. Two types of cytotoxicity tests were performed; in static and dynamic conditions. In the static condition, human normal diploid fibroblast HEL299 was cultured on the disks of t…
The complexation reactions of 1 : 1 molar ratios of M(NO3)3·nH2O (M = Y, La–Pr, Sm–Lu) and pentaethylene glycol (EO5) in 3 : 1 CH3CN : CH3OH were investigated. Crystalline complexes were isolated for all metals investigated and X-ray structural analyses performed. The M(NO3)3–EO5 complexes structurally characterized a…
Chemical solution depostion of nanocrystalline Zn2SiO4:Mn on the biogenic silica frustule derived from the cultured marine diatom (Pinnularia sp.) is reported. Our deposition process uses rather simple chemistry that consists of only metal halides and water. Two types of nanostructures can be generated, depending upon…
Low Temperature Sintering of ZnO-Doped 0.01Pb(Mg1/2W1/2)O3–0.41Pb(Ni1/3Nb2/3)O3–0.35PbTiO3–0.23PbZrO3 Ceramics, Kim, Sang-Jong, Kang, Chong-Yun, Choi, Ji-Won, Kim, Hyun-Jai, Sung, Man-Young, Yoon, Seok-Jin
We report the successful electron-beam patterning of nanostructures, in the form of both lines and dots, using hydrogen silsesquioxane (HSQ) resist. Although HSQ has proven to be a good resolution electron-beam resist, the adhesion between and the HSQ resist is problematic when trying to form fine patterns. To promote…
Formation damage has been observed in several oil reservoirs and production equipment in Iranian oil fields. Laboratory and field testing confirmed that the primary cause of damage was the build-up of calcium carbonate, calcium sulfate and strontium sulfate scale either in the perforation tunnels or in the formation s…
The paper proposes a method for determination of mechanical properties of adhesive layers (necessary for numerical calculations) by means of samples from a glue cast subjected to compression as well as a method of taking adhesion into account in numerical calculations of adhesive bonds. Additionally, a method of numer…
A fuel performance code, COSMOS, was developed for an analysis of the thermal behavior and fission gas release of both mixed-oxide (MOX) and UO2 fuels up to high burnup. The models have been improved for the fuel thermal conductivity, the fission gas release, and the cladding corrosion and creep. In particular, the th…
Phase equilibria in the Ho 2 X 3 -Cu 2 X-ZX 2 (Z = Si, Ge; X = S, Se) systems at 870 K were determined using X-ray single crystal and powder diffraction. The existence of the HoCuS 2 , HoCu 5 X 4 compounds and the Ho (2+x)/3 Cu 2-x S 2 (0 < x ≤ 0.61), Ho (2+x)/3 Cu 2-x Se 2 (0 ≤ x ≤ 1) solid solutions was confirmed in…
Natural fiber composites, (NFC) are defined in this work as a group of materials where at least the fibers originates from renewable and CO2 neutral resources. NFC consists of a polymer matrix and a natural fiber. The fibers which originate from wood or plants can replace non-renewable fibers or fillers or simply repl…
The unit cell parameters and the fractional atomic coordinates of the orthorhombic perovskites of ABO3 type are expressed as a function of the effective ionic radii of the constituents using two approaches: multiple linear regression and artificial neural networks. For this purpose, 46 orthorhombic perovskites of GdFe…
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…