Materials Literature
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The lability of the mononuclear octahedral complex tris(5-methyl-2-(1‘-methylbenzimidazol-2-yl)-pyridine)cobalt(II), [Co( 2 ) 3 ] 2+, is compared with the dinuclear triple-helical complex tris[bis[1-methyl-2-(5‘-methylpyrid-2‘-yl]benzimidazol-5-yl]methane]dicobalt(II), [Co 2 ( 1a ) 3 ] 4+ . [Co( 2 ) 3 ] 2+ undergoes r…
The corrosion resistance and electrochemical activity of boron‐doped, polycrystalline diamond thin films were evaluated before and after potentiodynamic cycling between −0.7 and 0.7 V vs. Ag/AgCl in 15 weight percent KOH. The maximum anodic current densities at 0.7 V ranged from 0.3 to 6.0 mA/cm 2 . Two types of corro…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTPreparation of Layered Silica−Dialkyldimethylammonium Bromide NanocompositesMakoto OgawaView Author Information PRESTO, Japan Science and Technology Corporation, and Institute of Earth Science, Waseda University, Nishi-waseda 1-6-1, Shinjuku-ku, Tokyo 169-50, Japan Cite this: L…
The Ar-ion-irradiation effects in the Al70Co15Ni15 decagonal quasicrystal (DQC) have been studied by means of transmission electron microscopy (TEM). The phase transformation behaviour is dependent on the dose, dose rate and the thickness of the specimen. The as-annealed Al70Co15Ni15 DQC consists of needle-like ordere…
This paper describes the main cause of crosstalk in a cylindrical type rotary transformer by using the electromagnetic field analysis taking account of both the eddy current and the displacement current. Factors affecting the crosstalk of the rotary transformer are also discussed, namely, the permeability and permitti…
An extended Hückel calculation was employed to calculate the change in the electron density on the Si–O back bonds and the total electronic energy during the reaction at the SiO 2 film surface. We demonstrate that the desorption of SiF 4 occurs as follows: (1) bifluoride ( HF 2 - ) ions dissociate into HF monomers and…
Abstract A redetermination of the crystal structure of ganomalite, with composition Pb 9 Ca 5.44(1) Mn 0.56(1) Si 9 O 33 , using new single crystal X-ray diffraction data is reported. Hexagonal space group symmetry P [unk], with Z = 1 and unit cell parameters a = 9.8456(3) Å and c = 10.1438(4) Å. The refinement of a s…
Resistivity and adhesive strength were measured for the thin films 450 A Cr-1800 A Au, 450 A Cr-1000 A Mo-1800 A Au, 450 A Cr-1000 A Ni-1800 A Au, 450 A Mo-1800 A Au, 1800 A Au, and 2000 A Al on z-and AT-oriented single crystal quartz substrates in the as-deposited condition as well as after thermal annealing at 380 d…
Abstract A time‐based model for the water‐influenced dielectric aging of FRP is presented, using chemical mechanisms to explain the measured increase of the loss tangent and the dielectric constant as well as the interphase orientation of the electrical breakdown channel in FRP insulators. Although this hypothesis is…
The validity of a phenomenological description of the permittivity as a function of the applied electric field and temperature is checked for real single-crystal strontium titanate samples. It is shown that this model provides a fairly reliable quantitative description of the dependence ɛ ( E , T ) for isotropic and a…
Abstract Infrared and nuclear magnetic resonance spectra of basic lead carboxylates used as heat stabilizers for halogenated polymers indicate that these salts are not complexes or double compounds of lead oxide, as suggested in most textbooks, but rather unique compounds of interesting structure. Lead stabilizers pro…
Abstract Glass fiber reinforced composites can be recycled by combustion of the polymer in a fluidized bed and reclamation of the reinforcement. The effect of heat on the reinforcing properties of glass fibers was studied by measuring the strength of a composite incorporating heat cleaned glass cloth. This work was th…
The dc electrical conductivities of (${\mathrm{TeO}}_{2}$${)}_{0.8\mathrm{\ensuremath{-}}\mathrm{x}}$-(${\mathrm{V}}_{2}$${\mathrm{O}}_{5}$${)}_{\mathrm{x}}$-(ZnO${)}_{0.2}$ (0.05\ensuremath{\leqslant}x\ensuremath{\leqslant}0.35) glasses are reported in the temperature range 100--400 K. Mott's model of thermally activ…
Experimental solubilities are reported at 25.0°C for thianthrene dissolved in twenty-one different organic nonelectrolyte solvents containing ether-, hydroxy-, and t-butyl-functional groups. Results of these measurements combined, with our previously published thianthrene solubility data in n-hexane, n-heptane, n-octa…
Plasticized films cast from ethyl cellulose were examined to evaluate the effect of the degree of substitution, DS, and the plasticizer content on the sorption and diffusion of oxygen. Sorption and permeation measurements were performed over a temperature range of 25–65°C on three different types of ethyl cellulose in…
Partial pressures of molecular species over solid PbO were measured in the temperature interval between 890 K and 1100 K using Knudsen-cell mass spectrometry. The assignment of ions is discussed in detail. Structural and vibrational parameters of the gas phase for (PbnOn) (n = 1,2,3,4) were calculated by the ab initio…
RESUMO: Blendas de poli(tereftalato de butileno) (PBT) e copolímero ABS foram estudadas usando-se três tipos diferentes de ABS. As blendas foram caracterizadas mecanicamente através de ensaios de tração e de impacto, e termo-mecanicamente através da determinação da temperatura de deflexão térmica (HDT). Uma influência…
Constitutive equations for the relationship between stress, strain, strain rate, and temperature are an essential input for modelling thermomechanical processing. Hot plane strain compression testing was used to deform commercial purity aluminium, Al-1Mn, and Al-1Mg alloys at temperatures of 300, 400, and 500°C and eq…
To assess the effect of wind speed in practice, experiments were conducted under conditions of realistic wind velocities generated in the climatic chamber. The theoretical and experimental results were compared. In the theoretical model of forced convection between the human skin and the external environment the water…
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