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。
In this work, the diamond deposited by hot filament chemical vapor deposition (CVD) is polished using an atmospheric pressure plasma. In order to position the film relative to the plasma, a microactuator system is designed using a stack of domed piezoelectric actuators. A dynamic model based on the physical system is…
In protecting food, packagings are shifting from passive protection to taking an active role in improving food quality. The active packaging, consisting of a polymer liner with an active agent in it, is able to produce a desired effect on the food. A wide variety of active agents exist, such as antimicrobials, which c…
Hydrogen-terminated Si [111] surfaces have been studied for tribological performance in the sliding of a diamond slider to obtain fundamental information on contact problems between an Si memory disk and the slider. The authors focus on the tribological role of the atoms on the contact surfaces and observe an extraord…
Abstract Dinitrogen oxide (nitrous oxide, N2O), a non-CO2 greenhouse gas, is produced as a by-product in the oxidation of cyclohexanone and cyclohexanol with nitric acid in adipic acid production plants. A Cu/Al2O3 catalyst has been used to decompose N2O to nitrogen and oxygen. We investigated the rate of deactivation…
The effects of recycling on the processability of two injection molding grade thermoplastic polymers has been investigated. Recycling of a Polypropylene (PP) and a Polyamide (Nylon 6, PA6) has been simulated by repeated injection molding cycles, followed by blending of the processed materials with the virgin polymer.…
The preparation of copper (II) and palladium (II) complexes derived from ligands of Schiffs bases (L¹, L², L³, L4) incorporating 1,3,4-oxadiazole and 1,3,4-thiadiazole rings are reported. The thermal behaviour of the complexes was characterized by DSC, TGA and polarizing optical microscopy. Only the complexes derived…
With the aim of studying the characteristic features of chemical interactions between atoms in the α (red tetragonal) and β (black monoclinic) modifications of zinc diphosphide, the maps of deformation electron-density distribution at the P-P and P-Zn bonds were constructed from precision X-ray diffraction data. The P…
The surface morphology and the structure of porous germanium layers obtained by chemical etching of n -type single-crystal Ge(111) substrates with their subsequent annealing in hydrogen atmosphere are studied by high-resolution X-ray diffractometry. It is established that upon etching a 1.5 to 2.0-μm-thick porous germ…
The vapour pressure of solids can be obtained using a number of methods, including the Knudsen effusion method, the Knudsen torque‐effusion method and a transpiration method. Each method has benefits and disadvantages. Reported is a comparison of vapour pressure data for two compounds, quinizarin and leuco ‐quinizarin…
The anticorrosive behaviour of octadecylamine (ODA) films has been investigated via weight loss and electrochemical methods. Tests were conducted on specimens of carbon steel, brass, and austenitic stainless steel in the presence and absence of amine films. Inhibitor efficiency values in excess of 94·5% were obtained…
With the ongoing decrease in magnetic spacing, the chemical durability of the lubricant film on magnetic recording media becomes a major factor in the reliability of the head-disk interface. There are several reports in the literature that have attributed deterioration of lubricant film to catalytic decomposition, and…
To elucidate the mechanism of nucleation and growth of filamentary crystals on the bipyramid faces of KH 2 PO 4 (KDP) crystals from solution with the addition of Al(NO 3 ) 3 · 9H 2 O, the growth rates and transverse dimensions of the crystals were measured at various supersaturations, temperatures, and impurity concen…
The residual effects of thermal aging on Twaron fibers have been studied using X-ray diffraction, weight analysis, scanning electron microscopy and tensile testing. X-ray data from isothermally aged fibers indicate the introduction of changes at the level of the crystal lattice, which include reduction in crystallinit…
Magnetic characteristics of the Nd2Fe14BHx single crystals and polycrystalline samples were investigated in the temperature range 4.2–750 K. It is established that hydrogen absorption does not change the crystal structure of these compounds but is accompanied by an expansion of a unit cell volume. The obtained data sh…
Avoidance of solvents in bonding operations is a current demand in the footwear industry. Halogenation of rubber soles with solutions of trichloroisocyanuric acid (TCI) in different solvents has been successfully used to improve bonding to the leather uppers. In this study, the use of chlorine bleach as an alternative…
The properties of precipitated silica modified with hexadecylamine, dodecanol, 9-decen-1-ol and γ-mercaptopropyltrimethoxysilane have been characterised and related to elastomer reinforcement capability. Extensive modification with these agents decreased the specific surface area and the critical surface energy of sil…
Abstract The measured optical and transport properties of single-crystal SrTiO3 have been determined as a function of oxidation and reduction using spectroscopic ellipsometry, Hall and resistivity measurements. A decrease in the valence to conduction band transitions across the band gap, from O 2p to Ti 3d states, is…
Goldbach’s conjecture, the crystallographic restriction, and the orders of the elements of the symmetric group. First recall that for an element g of a group G the order Ord(g) of g is defined to be the smallest natural number such that g Ord(g) = id if such a number exists, and Ord(g) =∞otherwise. In dimension n, the…
We have studied the electrical properties and microstructure of fluorine‐doped BaTiO 3 ceramics. The samples were prepared using a classical ceramic technology that involved the calcination of intimately mixed powders of BaCO 3 , TiO 2 , and BaF 2 . When the samples were sintered in untreated ambient air, the fluorine…
Abstract Hydrogen‐bonded supramolecular copolymers were easily prepared by mixing cyclohexanetricarboxamides with three ( 1 ) and six ( 2 ) alkylsilyl groups, and supramolecular fibers were fabricated. When the composition of 1 and 2 was at or close to equimolarity, the supramolecular copolymer chain was found to have…