Materials Literature
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Lithium loss kinetics from polycrystalline Li x Ni 1–x O has been investigated in the temperature range 900-1500°C by measuring the time and temperature dependence of the weight and lattice constant change of the samples. At 900°C the rate of Li 2 O evaporation was controlled by lithium ion diffusion in Li x Ni 1–x O.…
The XPS spectra of Nordstrandite were collected with a VSW HA150 using monochromatic Al Kα x-radiation. Monochromatic radiation provides a distinct clarity to the peak structure in the valence band of Nordstrandite due to the absence of interfering x-ray satellites from the intense O 2s region. Variations in the inten…
To estimate micro-segregation with dendritic solidification, a common method using an integral profile method has been developed. We considered three cases; (1) no diffusion in the solid and finite diffusion in the liquid, (2) finite diffusion in the solid and complete diffusion in the liquid, and (3) finite diffusion…
Nitronyl nitroxide radicals bridged by olefinic spacers display strong intramolecular and antiferromagnetic exchange interactions, the magnitude of which depends on the length of the spacer and on steric crowding around the radicaloid subunits.
—Different amounts (5-20 wt% with respect to the solids content in the adhesive) of a hydrated magnesium/aluminum silicate (attapulgite) were added to solvent-based polyurethane (PU) adhesive formulations. The rheological, thermal, mechanical, surface, and adhesion properties of the filled PU adhesives obtained were m…
Magic-angle-spinning NMR spectroscopic studies ${(}^{27}\mathrm{Al})$ have been undertaken to probe the local structure of Al in Al-Te glasses and stoichiometric and nonstoichiometric crystalline Al-Te samples. The chemical-shift values obtained clearly indicate that there are two different Al environments in Al-Te gl…
The bearing rig tests performed in this study demonstrate superior bearing performance of Cronidur 30 steel over conventional bearing steels. In these tests the L10 life of Cronidur 30 steel as calculated by the DIN/ISO 281 method was 80 times the unfactored L10 life under full lubrication conditions. In boundary lubr…
Abstract Radiation decomposition and aerosol formation of various volatile organic compounds (VOCs) were examined to get information on a treatment of industrial off-gas. Model gases, air containing aromatic VOCs, chloroethenes and 1,2-dichloroethane, were sealed in batch reactors and irradiated with electron beam (EB…
Boron added to urea formaldehyde (UF) resin during manufacture of board from waste tea leaves was combined with a fire-retardant coating system containing boron to further reduce combustibility. Boric acid (BA) and borax (BX) were used as boron compounds separately or in a mixture of 5:1 (BA:BX, w/w) in aqueous soluti…
The purpose of this research was to monitor the migration of formaldehyde from a polyethylene glycol (PEG) fill into the gelatin shell of a soft elastic gelatin capsule (SEGC) using near-infrared (NIR) spectrophotometry. SEGCs were filled with five solutions of aqueous formaldehyde in PEG (0, 0.05, 0.10, 0.20, and 0.4…
The synthesis of carbohydrate surfactants bearing carbosilane, silane, polysilane and non-permethylated siloxane moieties is described. These surfactants consist of three structural elements: (1) a silicon-containing moiety, (2) a spacer and (3) a carbohydrate unit. Additionally two different types of mixed structures…
Severe plastic deformation (SPD) processing is widely used to control and refine the grain size of monolithic metals and alloys, with grain sizes of less than 100 nm produced in recent years. One particular SPD technique, severe plastic torsional straining, has been found to effectively consolidate both micrometre and…
The purpose of this paper is to search for bistable hydrocarbons for which the lowest singlet and triplet states are nearly degenerate in their substantially different equilibrium geometries, the two wells being separated by a significant energy barrier. For non-alternant hydrocarbons with fused odd-membered rings, tw…
Single crystals of p-type PbTe were prepared by the Bridgman method, where either Ag2Te or K was doped as the source material of silver or potassium, respectively. Carrier concentration and Hall mobility were measured from 77 to 300 K. The hole concentration was successfully controlled in the range from 2.0×1024 to 9.…
Composite films of various tetraphenylporphines embedded in ethylcellulose were prepared and their optical response to gaseous HCl was investigated. The absorbance of the Soret and Q-bands for free-base tetraphenylporphines is reversibly sensitive to ppm levels of HCl. The replacement of thepara hydrogen in one phenyl…
The transport of poly(ethylene glycol) chains than can promote mucoadhesion across the interface between lightly cross-linked poly(acrylic acid) and mucin may be analyzed as a function of molecular characteristics using theories of chain penetration in a dilute network. The fracture energy for the ensuing adhesive bon…
The activation of the (110) TiO2 rutile surface by deposition of alkali metal atoms has been the subject of some recent experimental studies. These results indicate a reduction of the surface when sodium atoms are deposited on it. In the present work, this process has been studied by means of ab initio embedded cluste…
During heating of semicrystalline PET, a metastable melt forms far below the equilibrium melting temperature. Crystallization kinetics of this metastable melt is discussed on the basis of DSC results. From the metastable melt almost one-dimensional growth of the crystal occurs through heterogeneous nucleation.
The results of the temperature dependence of dc conductivity, microwave dielectric constant, X-ray diffraction, EPR, and NMR experiments are reported for chemically synthesized polypyrrole films soluble in organic solvents. The temperature dependence of dc conductivity of these systems follows the three-dimensional va…
Potential-energy surfaces for various channels of the HNO+NO2 reaction have been studied at the G2M(RCC,MP2) level. The calculations show that direct hydrogen abstraction leading to the NO+cis-HONO products should be the most significant reaction mechanism. Based on TST calculations of the rate constant, this channel…