Materials Literature
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Factors limiting the strain rate of superplastic deformation in ceramic materials are discussed on the basis of existing models and experimental results concerning high-temperature plastic deformation, intergranular cavitation and dynamic grain growth. From the discussion, it is indicated that simultaneously fulfillin…
2-amino-1, 3, 4-thiadiazoles (AT), 2-amino-5-methyl-1, 3, 4-thiadiazoles (AMT), 2amino-5-ethyl -1, 3, 4-thiadiazoles (AET) and 2-amino-5-propyl -1, 3, 4-thiadiazoles (APT) were synthesized. FT-IR and NMR studies were done in order to confirm the composition of the synthesized inhibitors. These compounds were evaluated…
A range of bis-facial tridentate chelate complexes of type [Fe((R-pz)(3)CH)((3,5-Me(2)pz)(3)CH)](BF(4))(2) has been characterised that contain two different tris-pyrazolylmethane ligands, with variations in R being H (complex crystallised as polymorphs and ) and 4-Me (), as well as R = H with a CH(2)OH arm off the met…
New applications of lignocellulosic fibres have been driven by numerous factors, including pressure from environmental groups, stringent environmental laws, waste minimisation efforts, recycling and cost reduction initiatives and responsible social awareness. However, the exploitation of such fibres in, for instance,…
The initial atmospheric corrosion of copper was investigated by means of a quantitative in situ analysis in an atmosphere containing 120 ppb of acetic acid and 95% relative humidity using a quartz crystal microbalance (QCM) integrated with infrared reflection absorption spectroscopy (IRAS). Crystalline cuprous oxide (…
Reactions of Na(tmeda)[N((i)Pr(2)PTe)(2)] with CuCl, AgI or AuCl (in the presence of PPh(3)) in THF produced the coinage metal ditelluroimidodiphosphinate complexes {Cu[N((i)Pr(2)PTe)(2)]}(3), (5), {Ag[N((i)Pr(2)PTe)(2)]}(6) (6) and Au(PPh(3))[N((i)Pr(2)PTe)(2)] (7), respectively. Complexes 5, 6 and 7 were characteriz…
From magnesium citrate and its mixtures with poly (vinyl alcohol), mesoporous carbons were successfully obtained through their carbonization at 900°C, followed by the dissolution of MgO. A high surface area as more than 1500m2/g was obtained without any activation process, which was mainly due to mesopores with a size…
Strongly adherent Sr Al 2 O 4 : Eu films were fabricated on the rough surface of an alumina substrate by a combination of the radio frequency (rf) magnetron sputtering technique and a post-thermal treatment. A crystalline Sr Al 2 O 4 : Eu 2 + film was obtained after annealing at 1000 ° C in a reduced atmosphere and it…
The knowledge of the condition of electrical equipment of power systems is a fundamental part for the reliability of energy systems. For the evaluation of the insulation condition of high voltage power equipment the partial discharge detection is one standard instrument. As diagnostic tool the partial discharge measur…
A finite element model was built to investigate how to optimize localized plasmon resonances of an Ag-coated dielectric tip for tip-enhanced Raman spectroscopy (TERS). The relation between the resonance frequency, the electric field enhancement and the optical constant of the dielectric tip was numerically investigate…
Crosslinked chitosan beads reported in the literature have the disadvantage of high water content and thus low mechanical strength. In this paper, a chitosan/poly(vinyl alcohol) (PVA) blend aqueous solution was first suspended in toluene–chlorobenzene to form droplets. Some of the water was then distilled out as an az…
Nematic cyanobiphenyl dimers have been found to exhibit a strong flexoelectric coupling, whose molecular origin is not obvious; we can explain such behaviour and clearly identify the role of different molecular features using a computational approach which combines a molecular level model and the elastic continuum the…
The requirements for a broadband antireflective structure in the THz spectral region are derived. Optimized structural parameters for a surface-relief grating adapted to the spectrum of an intended THz pulse are deduced. The effect of a structure fabricated into Topas((R)) by a single-point diamond-turning process is…
Here we designed and synthesized a new ligand, di(2-pyrazyl)amine (Hdpza) (1) and studied its coordination modes and the corresponding complexes with Cu(II), Co(II), Ni(II) and Cr(II). Hdpza is an analogue of the well-studied di(2-pyridyl)amine (Hdpa) ligand, which was used to generate the first extended metal atom ch…
Environment-friendly composites reinforced with bagasse fiber (BF), a kind of natural fiber as the remains from squeezed sugarcane, were fabricated by injection molding and press molding. As appropriate matrices for injection molding and press molding, polypropylene (PP) and polycaprolactone-cornstarch (PCL-C) were se…
A ferritic alloy interconnect was studied through solid oxide fuel cell (SOFC) stack operation at intermediate temperatures. Certain pretreatment of the alloy surface proved to be effective for controlling initial degradation of the stack performance, presumably by the formation of stable and conductive oxide scale. E…
A series of closely related tetrasubstituted derivatives of benzo[c]cinnoline (1), tetraazapyrene (2), phenanthrene (3), and pyrene (4) were investigated for their mesogenic properties using thermal, optical, spectroscopic, and powder XRD analyses. Only three 3,4-dioctyloxyphenyl derivatives exhibited mesogenic proper…
Previous studies have suggested that single-walled carbon nanotubes (SWCNTs) may pose a pulmonary hazard. We investigated the pulmonary toxicity of single-walled carbon nanohorns (SWCNHs), a relatively new carbon-based nanomaterial that is structurally similar to SWCNTs. Mice were exposed to 30 µg of surfactant-suspen…
Photoluminescence Optimization of Luminescent Nanocomposites Fabricated by Spray Pyrolysis of a Colloid-Solution Precursor, Wang, Wei-Ning, Widiyastuti, W., Wuled Lenggoro, I., Oh Kim, Tae, Okuyama, Kikuo
Using an alloy, the formation of porosity in anodic alumina films is examined in phosphoric acid and borax electrolytes. During growth of major pores in phosphoric acid electrolyte, the film develops two main layers with respect to the cation species: an outer layer of tungsten-free alumina, located next to the electr…