Materials Literature
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Coexistence of two phases, having different in-plane dimensions, is found in the planar Sr2−xLaxMnO4 for 0 < x ≤ 0.38 at room temperature. Furthermore, charge ordering with modulation wave vector (π2, π2) is discovered for x=0.5 below ∼ 250 K. Together with transport and magnetic measurements, these results indicate t…
The origin of spurious and irreproducible signals in the measurement of the hyper-Rayleigh scattering (HRS) of solutions is investigated. A new cell design, coupled with continuous solution filtration through a 20 nm filter, is shown to improve the reproducibility of the measurement to ±5%. A transverse cell dimension…
Abstract The polymerization of a bismaleimide‐styrene system was studied by using a model compound, p‐maleimidobenzoic anhydride, that can be split by simple hydrolysis. Compared to known divinyl systems, a decreased reactivity of the pendant double bonds is observed, probably as a result of cyclization and the steric…
Abstract Cold rolling mill productivity and product quality depend on the lubricant chemistry and composition, as well as on such physical factors as operation and maintenance. This paper discusses new requirements for rolling mill oils. Ester‐based rolling oil formulations have been developed and their performance is…
A protocol for global analysis of x-ray photoelectron spectra of plasma-deposited polymer films is presented. These materials are difficult to analyse because of the multitude of different chemical groups present. The combination of different primary and secondary binding energy shifts results in relatively broad, fea…
In this paper, the recent development of a computer-aided partial discharge (PD) acoustic location system is briefly introduced. The paper presents the characteristics of this system with emphasis on the acoustic locating technique and interference countermeasures. Signal recognition, ascertainment of time delay and t…
Abstract The dehydroxylation and rehydroxylation properties of titania (Degussa P‐25) were investigated. FTIR and TPD‐MS data indicate that hydroxyl groups are not completely removed at 500 °C in vacuo , and rehydration/rehydroxylation occur under helium (water content < 1 ppm) flow at room temperature. In addition…
Abstract There were two objectives in the study: 1) To determine exchangeable K and non‐exchangeable K in soils with different potassium depletion levels and mineralogy as plant sources 2) To establish a relationship between the mineralogy vs exchangeable K (Ke) and non‐exchangeable K (Kne) mobilization. An extraction…
A procdure using the Reverse Monte Carlo technique was shown to find the correct microscopic density of scattering centers (atoms, ions, etc.) in a model liquid within about 2%, on the sole basis of diffraction data. The method was also tested on solid amorphous systems of low, as well as of high packing fractions. An…
In order to be able to reduce the leakage of contaminant out of a fume cupboard it is first necessary to investigate the detailed fluid flow patterns inside and around the fume cupboard. Because of the difficulties and expense of performing these experiments, in this paper a computational fluid dynamics approach has b…
Abstract The practical application of high impact polystyrene (HIPS) depends on the resistance to aging in aggressive environments. The investigation of morphological, mechanical, and chemical properties was made on HIPS samples of various thickness. The property deterioration of HIPS caused by concentrated nitric aci…
The electrical failure of multilayer ceramic capacitors (MLC's) subjected to environmental screening testing (EST) environments is systematically studied in this work. Based on results obtained from comparative EST environments, it is shown that a thin water film can appear on the MLC surface as a result of water vapo…
Abstract We have studied mechanical and rheological behavior of poly(vinyl acetate) (PVAC) composites filled with calcite as a function of filler particle geometry, particle size distribution, and active surface area. Detailed morphological characteristic were investigated. Tensile properties of PVAC composites were e…
Concentrations of population and business activities result in high electricity demand in urban areas. This requires the construction of large-capacity underground substations. Oilless, nonflammable and nonexplosive equipment is recommended for underground substations. Therefore, several types of large-capacity gas-in…
We have carried out x-ray diffraction studies on the modulated phases of ${[\mathrm{N}{(\mathrm{C}{\mathrm{H}}_{3})}_{4}]}_{2}$Zn${\mathrm{Cl}}_{4}$ and ${[\mathrm{N}{(\mathrm{C}{\mathrm{H}}_{3})}_{4}]}_{2}$Fe${\mathrm{Cl}}_{4}$ under hydrostatic pressure. The geometrical similarities among the pressure-temperature ph…
Advanced sewing machines should be able to set up automatically, detect sewing faults, and self-adjust to required settings. In order to achieve this objective, a sewing machine has been instrumented with sensors, so that wave forms of needle penetration and withdrawal forces, presser-foot compression force, and sewin…
The behavior and some physical and thermal properties of a 30Li 2 O‐70SiO 2 base glass composition with addition of ZrSiO 4 in the as‐quenched state was investigated with the aid of X‐ray diffraction (XRD), differential thermal analysis (DTA), thermal expansion and microhardness measurements, as well as density measur…
During heat treatment of an industrially produced Al high-Mn alloy, small particles of the quasicrystalline icosahedral AlMnSi phase were precipitated, with a definite orientation relation to the Al matrix. Upon further annealing, the particles coarsen and transform, through intermediate stages into the cubic α-AlMnSi…
We have investigated the crystallinity of (BTO) thin films on (100)MgO and (100)STO substrates and the (YBCO) buffer on MgO. An ArF excimer laser with a fluence 1.4 to 3.6 per pulse was used of the preparation of BTO films at substrate temperatures in 500 to and oxygen pressures of to Torr. BTO thin films with (001) o…
The chemical and p ysical structures of archaeological mineralized plant fibers are studied using energy x-ray dispersive spectroscopy (EDS), scanning electron microscopy (SEM), and FTIR microspectrometry, and compared with two contemporary bast fibers. The outer surfaces of the fibers and the inner surfaces of the lu…