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。
High performance lignocellulosic composites with uniform densities, durability in adverse environments, and high strength can be produced by using fiber technology, bonding agents, and fiber modification to overcome dimensional instability, biodegradability, flammability, and degradation caused by ultraviolet light, a…
Article The crystal structure of a rare earth bearing leucophanite: (Ca,RE)CaNa2Be2Si4O12(F,O)2 was published on December 1, 1992 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 202, issue 1-4).
XPS measurements are presented for poly (methyl methacrylate). The data include the valence band region and the principal core levels.
XPS measurements for poly (ethyl methacrylate). The data include the valence band region and the principal core levels.
Abstract Coaquandite, a new antimony oxy-sulphate hydrate, occurs as spheroidal knobs of silky fibres or, rarely, as tiny transparent colourless lamellar crystals on stibnite at the Pereta mine, Tuscany, Italy; it is associated with klebelsbergite, peretaite, valentinite, sulfur, gypsum, stibiconite, and senarmontite.…
The lead zirconate rich lead zirconate titanate based ceramics present high pyroelectric coefficient as well as low dielectric constant in their rhombohedral ferroelectric phase transitions, and therefore possess many desirable properties for potential applications in pyroelectric devices. The dielectric, pyroelectric…
Pseudomonas oleovorans is an adaptable, aerobic bacterium that can produce a wide range of storage polyesters (poly-β-hydroxyalkanoates, PHAs). With few exceptions, the PHAs obtained when this bacterium is grown with single organic substrates capable of polymer production are generally copolymers. With two different p…
The computer tomography(CT image of wood was analyzed to estimate the moisture content from CT number. Comparing moisture contents, densities and CT numbers, moisture distributions were nondestructively determined by CT numbers detected with the scanner. By periodically measuring CT images of the same cross section of…
Chemical vapor deposition of Cu film on SiO 2 has been studied using cyclopentadienylcoppertriethylphosphine (C 5 H 5 CuP(C 2 H 5 ) 3 ), which contains no oxygen atom itself. The deposited Cu films had complete (111) preferred orientation for deposition temperatures below 450°C. From Auger electron spectroscopy measur…
Abstract The utilization of rubber mixtures is to achieve a desired combination of properties and performance spectrum of elastomers is nowadays of a considerable technological and economical importance. The successful implementation of this concept requires the knowledge of the factors governing both the phase behavi…
Pressure-shear plate impact experiments on an elastohydrodynamio lubricant (5P4E) are interpreted by means of a full finite deformation analysis of stress wave propagation in an elastic/viscoplastic material. The elastic response is modeled as that of a neo-Hookean solid, modified to include compressibility in such a…
Model exact static and frequency-dependent polarizabilities, static second hyperpolarizabilities and THG coefficents of cumulenes and polyenynes, calculated within the correlated Pariser-Parr-Pople (PPP) model defined over the pi-framework are reported and compared with the results for the polyenes. It is found that f…
Sm2Fe17Nx(x=3), of purity 95 vol%, was obtained by nitrogenation of Sm2Fe17alloy using a mixture of NH3(0.35 atm) and H2(0,65 atm) gases. The saturation magnetization 4πI, was 15.5 kG, and the anisotropy field Hawas found to be 220 kOe. Aligned Sm2Fe17N3powders with an average grain size of 3 μm showed a (BH)maxvalue…
Abstract Photo‐oxidative degradation reactions are mainly responsible for reduced lifetime in polymers. These reactions are responsible for the decay in useful physical and chemical properties of polymers. In addition to high ultraviolet radiation doses, hostile environments have increased temperature, high humidity,…
The kinetics and mechanism of the synthesis and degradation of polyhydroxyalkanoates (PHA) in Alcaligenes eutrophus have been studied. PHA polymers were accumulated in the cells in nitrogen-free mineral media containing various carbon substrates, and the accumulated PHA polymers were subsequently degraded after the ca…
Abstract The crystalline structure of the M 2 CuWO 6 phases with M = Ba or Sr was obtained from X-ray powder diffraction at room temperature with CuK α radiation. The phases are isostructural with tetragonal unit cells, space group I4/m and Z = 2. The parameters for the Sr 2 CuWO 6 phase are: Mr = 518.6, a = 5.42693(5…
Abstract Surface roughness and thickness uniformity are two of the most important parameters to control in the manufacture of polymeric films. In this paper, we present the results of a detailed experimental study on the effect of biaxial stretching variables on these parameters in polyethylene terephthalate and poly…
Argon ions (Ar+) were implanted into a substrate of natural graphite (crystal) by 4 kV acceleration for a period of 5 min using a VG EX05 ion gun. (The surface plane of the substrate was perpendicular to the flight path of the argon ions.) No attempt was made to maximize the argon concentration within the graphite. Th…
The ability to achieve high twisting rates without the need to rotate the heavier mechanical elements and the low yarn tensions enable very high delivery rates with friction spinning. The soft handle of the yarn, versatility to handle all types of fibres and the core spinning facility are the other meri.ts of this sys…
Aus Cer und Kaliumpolyselenid in der Schmelze ist KCeSe 4 zugänglich. Die Struktur dieses neuartigen Lanthanoidpolychalcogenids ist verwandt mit der CuAl 2 ‐Struktur, und Ce und Se bauen anionische Schichten mit K + Ionen in den Zwischenräumen auf. Die Ce 3+ ‐Ionen sind quadratisch‐antiprismatisch von acht Se ‐Einheit…