Materials Literature
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Commercial scale production of a Fe-6.5 wt. % Si sheet has been successfully developed. Presently manufactured sheets are in coil form, whose thickness ranges from 0.1 to 0.5 mm with a maximum width of 400 mm. Magnetic properties of the manufactured sheet have been investigated. The permeability of Fe-6.5 wt. % Si she…
ZnO:Al coatings were prepared by rf magnetron sputtering of ZnO together with dc magnetron sputtering of Al onto rapidly revolving unheated substrates under weakly oxidizing conditions. Optimized films had ∼1% luminous absorptance, ∼85% thermal infrared reflectance, and ∼5×10−4 Ω cm electrical resistivity at a thickne…
Quantum-size effects of an electron-hole system confined in microcrystals of semiconductors are studied theoretically with the spherical-dielectric continuum model. An extensive numerical calculation for the eigenvalue problem is carried out by Ritz's variational technique. The motional state of the lowest level is cl…
Defect formation in dehydrated silica glasses was investigated using various excimer lasers with different energies. The ArF laser (6.4 eV) generates the E′ center more effectively than the KrF laser (5.0 eV), while the XeCl laser (4.0 eV) generated no centers. Defect generation was found to be proportional to the squ…
In Part one, the formation and development of leader filaments in large air-gap discharges are studied by Schlieren techniques. The time evolution of the thermal diameter of the leader at a given point in space is studied for several gap spacings ranging from 1 to 16.7 m and for different wave forms and voltage levels…
The electrosynthesis of metalloporphyrins which contain a metal-carbon σ-bond is reviewed in this paper. The electron transfer mechanisms of σ-bonded rhodium, cobalt, germanium, and silicon porphyrin complexes were also determined on the basis of voltammetric measurements and controlled-potential electrooxidation/redu…
The optical and nonlinear optical properties of 2-(N-prolinol)-5-nitropyridine (PNP) have been investigated. The refractive indices show strong dispersion and high birefringence in the spectral range from 488 to 1064 nm. At 632 nm the main refractive indices are nx=1.990, ny=1.788, and nz=1.467. The two major nonlinea…
The optical susceptibilities of CdSxSe1−x -doped glasses were observed up to χ(11) using a spatially resolved phase-matched multiwave mixing technique. Using a pulsed dye laser tuned near the band gap, measurements were performed for ‖χ(3)‖, ‖χ(5)‖, and ‖χ(7)‖ in four different commercial filter glasses.
We report the first measurements of elastic coefficients and viscosities that clearly demonstrate the distinction between rigid and semiflexible behavior of a main-chain polymer nematic liquid crystal, a solution of poly-$\ensuremath{\gamma}$-benzyl glutamate (PBG) in mixed organic solvents. Quasielastic Rayleigh scat…
We have investigated characteristics of polycrystalline diamond thin films formed by plasma-enhanced chemical vapor deposition method on silicon substrates using Raman spectroscopy, analytical and high-resolution transmission electron microscopy techniques. Grains with average size 1 μm in diameter were observed in th…
Small-angle neutron-scattering data, obtained from a near-symmetric isotropic diblock copolymer, demonstrate non-mean-field behavior over a wide temperature range (\ensuremath{\ge} 57\ifmmode^\circ\else\textdegree\fi{}C) above the weakly first-order microphase-separation transition. These results are quantitatively ex…
Electro-optic phase modulation was measured along with optical second-harmonic generation in thin films of a new copolymer containing a dicyanovinyl-terminated azo dye side chain. Orientational order was imparted to these films by poling with a corona discharge. Details of the electro-optic measurement technique, in w…
The authors report analytical studies of the adsorption-desorption transition of polymers grafted at a penetrable surface, in the 2D and 3D partially directed SAW models. The fraction of adsorbed monomers and the phase diagram of the transition are calculated by the transfer matrix method.
Transient phase response associated with a small angle relaxation from highly deformed nematic liquid crystal (LC) directors is analyzed experimentally and numerically. Qualitative agreement between computer simulations and experimental results is obtained. Based on these results, decay time of a fast LC modulator emp…
Article Crystal chemistry of iron in natural and in synthetic braunites Mn2 +(Mn3+,Fe3+ )6O8/SiO4 was published on November 1, 1988 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 184, issue 1-4).
Abstract Der Stahl W.Nr. 1.8907 wurde in flüssigem Ammoniak unter elektrochemisch kontrollierten Bedingungen bei etwa 20 °C in Zugversuchen mit konstanter Dehngeschwindigkeit an Rundproben auf Spannungsrißkorrosion geprüft. In reinem Ammoniak trat beim freien Korrosionspotential im Bereich der aktiven Korrosion keine…
FIM technique has been applied to investigation of structural state of an ordered alloy implanted by Ar+ and N+ ions. An ordering-disordering phase transition has been observed in the ordered solid solution Cu3Au after irradiation with ions' energies 15-20 keV and doses 1016-1018 cm-2. A near-surface region which has…
Abstract A quadricyclane derivative stable in water was first synthesized. Valence isomerization between the quadricyclane and the corresponding norbornadiene was very clean, to be promising for a solar energy storage system.
The structural phase transition in single crystals of KSCN which can be classified as improper ferroelastic, has been investigated by accurate birefringence measurements, Brillouin scattering and far infrared spectroscopy. The optical study showed the transition to be of first order. The temperature dependence of the…
Abstract Natural mound and intermound soil pedons were characterized to investigate native mound‐intermound formation and soil properties that may explain unfavorable plant growth that has been observed on sites of truncated mounds. Subrounded mounds average 26‐m apart, 15 m in diam., and 0.5 m in local relief. Mound…