A Century of Progress in Electrical Insulation 1886-1986
This 100-year review examines the development of electrical insulation subdivided into materials, test methods and standards.
Materials Literature
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The effect of antimony on internal oxidation and magnetic properties of Si-Al electrical steels
Decarburization treatment performed by motor and transformer manufacturers often results in internal oxidation of the solute elements. The presence of subscale (zone affected by precipitation of Si-Al oxides) adversely affects magnetic properties, particularly permeability of the annealed steel. The permeability deter…
Azide-, Thiocyanate- or Cyanate-Bridged Di- and Trinuclear Copper(II) Complexes with N,N,N′,N′-Tetramethylethylenediamine, N,N-Diethylethylenediamine, 2,2′-Bipyridyl or 1,10-Phenanthroline
Abstract A series of di- and trinuclear copper(II) complexes containing N,N,N′,N′-tetramethylethylenediamine(tmen), N,N-diethylethylenediamine(deen), 2,2′-bipyridyl(bpy) or 1,10-phenanthroline(phen) and azide, thiocyanate or cyanate ions have been prepared and characterized by their magnetic susceptibilities, infrared…
Sequence determination in MMA-EMA copolymers by 13C NMR
The 13C nuclear magnetic resonance spectra of MMA-EMA copolymers have been recorded and analyzed. The carbonyl carbon resonance region contains six resonating peaks due to its sensitivity to triad concentrations. From these signals, triad concentrations were determined and compared with calculated values based on Bern…
Reduction to Equator, Reduction to Pole and Orthogonal Reduction of Magnetic Profiles
In addition to reduction to the pole of total intensity magnetic anomalies, two new magnetic transformations, reduction to the equator and orthogonal reduction, can be used to correct the asymmetry and lateral shift of measured magnetic total field profiles. These transformations can be implemented in both space and f…
Misch metal-Fe-B melt spun magnets with 8 MGOe energy product
The magnetic and structural properties of melt spun MM-Fe-B ribbons, where MM stands for misch metal, were examined. It has been shown that the MM16Fe75B9ribbon can exhibit a coercive force of 9.4 kOe and an energy product of 8.1 MGOe when it was quenched at the optimum rate of 20 m/sec, in terms of quenching wheel su…
Phase retardation dependent optical response time of parallel-aligned liquid crystals
Correlation between the director reorientation and its consequent optical response time of the parallel-aligned nematic liquid crystals was investigated. This optical decay time is found to depend on the phase retardation introduced by the liquid-crystal layer. To verify theory, dependence of optical decay time on thr…
Chemical Durability of Fluoride Glasses: I, Reaction of Fluorozirconate Glasses with Water
The chemical durability of five flouarozirconate glass compositions was studied. Measurements of leachant composition and solution chemistry by plasma emission spettroscopy, pH, and fluoride analysis are reported. Changes in surface structure were monitored by scanning electron microscopy, electron‐probe X‐ray analysi…
Synthesis of siloxane-containing bis(furans) and polymerization with bis(maleimides)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of siloxane-containing bis(furans) and polymerization with bis(maleimides)Giuliana C. Tesoro and Vinod R. SastriCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 3, 444–448Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Pu…
EPR study of vanadium (4+) in the anatase and rutile phases ofTiO2
We present cw and pulsed EPR experiments on ${\mathrm{V}}^{4+}$ in the rutile and anatase phases of ${\mathrm{TiO}}_{2}$. For the rutile phase, the cw data confirm earlier results, but the relaxation data are different from those previously reported. No earlier results for ${\mathrm{V}}^{4+}$ in the unreduced pure ana…
Kinetics of sodium bicarbonate decomposition
Abstract A thermal gravimetric method was used to measure rates of decomposition of NAHCO 3 particles. Such decomposition produces a highly porous Na 2 Co 3 that reacts with SO 2 rapidly and completely at moderate temperatures. Hence, NaHCO 3 decomposition provides a reactant with attractive features for SO 2 removal.…
New Nematic Liquid Crystals: Influence of Rigid Cored, Alkenyl Side-Chains and Polarity on Material and Display Properties
From the design of non-polar molecular structures exhibiting different rigid cores and isolated C=C double bonds in different side-chain positions and from investigations into the static dielectric birefringence, viscous, and all three elastic constants k 1, k 2, k 3, new, negative dielectric anisotropic nenatic lique…
Measurements of the Bend and Splay Elastic Constants of Octyl-Cyanobiphenyl
The bend (K33) and splay (k11 elastic constants of octylcyanobiphenyl have been measured as a function of temperature using the electric field induced Freedericksz transition. We have made simultaneous measurements of the dielectric constants and birefringence of 8CB using a cell with homogeneous alignment. Dielectric…
Effect of carbon content on hydrogen occlusivity and embrittlement of ferrite–pearlite steels
Experiments on a series of pure Fe–C alloys consisting of ferrite and pearlite only have shown that the ferrite/pearlite and pearlite/pearlite interfaces are effective hydrogen trapping sites. The ferrite/cementite interfaces within the pearlite colonies, however, have little effect on the hydrogen occlusivity. With a…
Mechanism of in vitro collagen fibril assembly. Kinetic and morphological studies.
The kinetics of in vitro fibril assembly of Type I collagen preparations that contain different amounts of covalently cross-linked oligomers was studied with turbidimetry. Fibril formation showed a lag phase with no solution turbidity and a growth phase with a sigmoidal increase in the solution turbidity. The length o…
Role of Minerals in Thermal Alteration of Organic Matter—II: A Material Balance
ABSTRACT Pyrolysis experiments were performed on Green River and Monterey Formation kerogens (Types I and II, respectively) with and without calcite, illite, or montmorillonite at 300 °C for 2 to 1,000 hours under dry and hydrous conditions. Pyrolysis products were identified and quantified, and a material balance of…
Synthesis and characterization of a meso-tetrakis(4-ferrocenylphenyl)porphyrin and examination of its ability to undergo intramolecular photocatalyzed electron transfer
ADVERTISEMENT RETURN TO ISSUEPREVArticleSynthesis and characterization of a meso-tetrakis(4-ferrocenylphenyl)porphyrin and examination of its ability to undergo intramolecular photocatalyzed electron transferErnst S. Schmidt, Thomas S. Calderwood, and Thomas C. BruiceCite this: Inorg. Chem. 1986, 25, 20, 3718–3720Publ…
The Role of Oxygen Mass Transfer in the Erosion-Corrosion of Slurry Pipelines
The erosion-corrosion of vertical 38-mm diameter pipes carrying aerated slurry (20 vol% – 30 + 50 mesh silica sand) in 3.13% NaCl solution at 2 to 6 m/s has been measured by weight loss measurements over periods of 100 h. Electrochemical methods have been applied to clarify the mechanism of the process and to determin…
Effects of crystallite size and support on the carbon monoxide hydrogenation activity/selectivity properties of iron/carbon
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of crystallite size and support on the carbon monoxide hydrogenation activity/selectivity properties of iron/carbonValiant K. Jones, Loren R. Neubauer, and Calvin H. BartholomewCite this: J. Phys. Chem. 1986, 90, 20, 4832–4839Publication Date (Print):September 1, 198…
Scale microfossils from the Early Cambrian of northwest Canada
Scale microfossils are locally abundant in rocks of the uppermost Tindir Group and basal beds of the overlying Funnel Creek Limestone in northwest Canada. Co-occurring organic-walled fossils in this microbial mat biota resemble forms described from the Upper Proterozoic but mineralized spicules of Cambrian aspect are…