Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
alpha -Fe/sub 2/O/sub 3/, gamma -Fe/sub 2/O/sub 3/, and alpha -FeOOH powders were used as starting materials to prepare barium hexaferrite hydrothermally. Since strontium hexaferrite and lanthanum-doped calcium hexaferrite have coercivities similar to that of barium ferrite, the hydrothermal synthesis of strontium hex…
Abstract Sudden changes of compressive strain‐rate on glassy poly(methyl methacrylate) lead to the conclusion that the post‐yield state under a constant stress is a state of steady flow in the polymer. Non‐linearity between the stress divided by temperature and the logarithm of strain rate for this steady plastic flow…
Reaction of H2oep (oep = dianion of octaethylporphyrin) with two equivalents of LiN(SiMe3)2 in tetrahydrofuran (thf) yields the dilithium salt [Li(thf)4][Li(oep)], characterized in the solid state by X-ray crystallography; in solution, 7Li NMR and conductivity measurements show a more complex, solvent-dependent struct…
Reaction of PdCl2 with the N2S4 donor macrocycles [18]aneN2S4(1,4,10,13-tetrathia-7,16-diazacyclo-octadecane) and Me2[18]aneN2S4(7,16-dimethyl-1,4,10,13-tetrathia-7,16-diazacyclo-octadecane) affords the 1 : 1 complex cations [Pd([18]aneN2S4)]2+ and [Pd(Me2[18]aneN2S4)]2+ respectively in high yield. The yellow complex…
Abstract Cellulose prepared from beech wood ( Fagus crenata Blume) was treated in a corona discharge. The chemical changes produced by the treatment were investigated by use of infrared spectrum, Schiff's reaction, adsorption of methylene blue and Orange II, and intrinsic viscosity. Infrared absorption bands at 1382 a…
Abstract Angle‐resolved x‐ray photoelectron spectroscopy (ARXPS) has been used to study the composition of oxides grown on 〈110〉 and 〈100〉 GaAs during exposure to UV/ozone. The effects of substrate treatments on oxide growth were compared on 〈100〉 surfaces exposed to an HF treatment and thermal desorption of the oxide…
Ethanol regeneration was applied to spent activated carbon which had adsorbed an organic compound in aqueous solutions, including an industrial wastewater. High regeneration efficiency was achieved except for aromatic compounds substituted by electron-donating groups. In the case where ethanol regeneration was not eff…
Keywords Disk refiners, Conical refiners, Cellulose fibers, Refining, Process variables, Energy, Fineness, Fiber length, Grooves, Bars, Impact, Equations
Abstract Polysulfone ultrafiltration hollow fibers were chemically modified on the surfaces with propylene oxide and Friedel‐Crafts catalysts. A peak at 1.6 ppm was observed in H 1 ‐NMR spectrum of the modified fibers at 45°C, while the peak was not observed at 27°C measurements. The peak was attributed to a hydroxide…
An Investigation is reported in which a model based upon fabric geometry was developed to predict the thread-volume fraction and elastic constants of three-dimensional angle-interlock fabric composites. The architecture of this model was investigated by identifying the structural and geometric parameters. The structur…
The effects of chromate and vanadate anions on the hot corrosion of preoxidized Ni by a thin fused film in an gas atmosphere at 900°C were investigated by use of a sodium sensor and an oxygen probe. The chromate anion suppressed the sulfidation of Ni probably by precipitating solid from the melt. However, the corrosio…
The fracture mode of lead zirconate titanate (PZT) ceramics at room temperature is investigated as a function of grain size. The fracture mode is almost intergranular at small grain size and changes to predominantly transgranular at large grain size. Application of an electric field (poling) causes a change in the fra…
This proceeding contains papers on advanced electronic packaging materials. Included are the following topics: Optoelectronics, Polymers, Composites, Aluminum Nitride, and Metallization.
An electrodeposition process by which gallium arsenide can be formed at room temperatures is reported. Gallium and arsenic can be codeposited from a room temperature melt comprised of and ImCl (1‐methyl‐3‐ethylimidazolium chloride) and an solute. Codeposition is studied over a potential range of 0 to −2V relative to a…
Local Joule heating in polyethylene films was detected at room temperature before dielectric breakdown under DC field. When a high-temperature point appeared in a film, the conduction current increased with time. The final breakdown occurred at the point of the highest temperature. This concurrence of the breakdown po…
Abstract
The problems connected with measuring the magnetic properties of electrical sheet steel under the condition of one-dimensional (alternating) and two-dimensional excitation (circular, elliptic, and alternating with rotation of the direction) are surveyed. Regarding the classical case of one-dimensional excitation, the…
A mixture of 4-butyl-4′-methoxyazobenzene (BMAB) and 4-n-pentyl-4′-cyanobiphenyl (5CB)([BMAB]/[5CB]= 0.03) undergoes an isothermal phase transition on pulse irradiation at 355 nm (10 ns fwhm), in which the relaxation from the nematic to the isotropic phase was completed within ∼ 100 ms as shown by time-resolved birefr…
A thermal molecular-beam system has been used to examine the oxidative dehydrogenation of methanol on the Cu(110) surface. The initial sticking probability for oxygen is 0.21 (±0.01) at room temperature and shows a near linear dependence of sticking coefficient on atomic coverage due to an island growth mechanism with…
The paper describes an experimental study of the rheology of concentrated latex under conditions where a secondary miminum in the interparticle pair potential is expected. Particular attention is given to the Bingham stress σB derived from steady-shear-flow data, which is taken as a measure of the additional or extra…