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。
The effect of post sintering heat treatments on the intrinsic coercivity of Fe-Nd-B magnets is studied. It is shown that the large anisotropy in thermal expansion coefficients in the a and c directions of the tetragonal unit cell as well as the anisotropy in thermal expansion properties between the matrix and the grai…
Abstract Rb 2 K 4 Co 2 O 5 wurde erstmals durch Erhitzen inniger Gemenge der binären Oxide in Form von dunkelroten Einkristallen und Pulver erhalten (vor Verreiben Rb:K:Co = 1,2:3,2:1; Ni‐Zylinder, 570°C, 20d). Die Strukturaufklärung [Vierkreisdiffraktometerdaten; PW 1100; AgK ‐Strahlung; 401 von 607 I 0 (hkl); R = 9,…
Article Overlooked trigonal symmetry in structures reported with monoclinic centred Bravais lattices; trigonal description of Li8Pb3, PtTe, Pt3Te4, Pt2Te3, LiFe6Ge4, LiFe6Ge5, CaGa6Te10 and La3.266Mn1.1S6 was published on December 1, 1990 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume…
Abstract The compatibility of suspension poly(vinylchloride) [PVC] with twelve different plasticizers was determined using calculated compatibility predictors, as well as actual measurements of compatibility. Solubility parameters were capable of classifying plasticizers of a given family in terms of their compatibili…
Abstract The oriented ingots of isostructural compounds Sn 2 SbS 2 I 3 and Pb 2 SbS 2 I 3 were prepared using a modified Bridgman method. The lattice parameters of the prepared orthorhombic compounds have been determined by a X‐ray powder diffraction analysis. From the spectral response of the photoconductivity the fo…
The limits of high-power, high-repetition-rate operation of photoconductive switches utilizing diamond are explored. To evaluate diamond as a photoconductor for high-power switching applications, the following experiments were performed: (1) measurement of switch resistance as a function of the bias electric field; (2…
Data from a single defected fuel element operating in-reactor are used to develop a physically based model for describing the increased release of iodine and noble gas fission products to the primary coolant following a reactor shutdown and start-up. Iodines are only released on reactor shutdown, whereas both species…
This report presents a descriptive model for the expansion and fragmentation behavior for the case of a single-point, end-initiated cylindrical warhead. This model divides the overall behavioral process of the warhead case into four distinct zones of behavior which occur between initial case motion and fragment impact…
Abstract The effects of (OH)/F substitutions on thermally induced reactions in the apophyllite group have been investigated using TGA and DTA methods, supplemented by X-ray diffraction, infra-red and other techniques to identify the products of reaction. The samples studied cover the range between fluorapophyllite and…
Abstract The rate theory of RA 2 +RB 3 polymerization has been developed to enable the concentrations of the smallest inelastic loops and the resulting reductions in elastic shear modulus at complete reaction to be evaluated. Reduction in modulus is expressed as M c /M° c , the effective molar mass of chains between e…
The effects of n-type dopant (P, As) concentration in silicon (100), temperature, and oxidizing species on native oxide growth in liquid water are described. The oxide growth on phosphorus (P)- and arsenic (As)-doped n + -Si surfaces (10 20 cm -3 ) in ultrapure water exhibits saturation of oxide thickness, suggesting…
Auger, ESCA, electron emission, evaporation, and desorption measurements were made on three different types of scandate surfaces. They are: (a) an impregnated top layer scandate cathode, (b) an unimpregnated top layer scandate cathode with a deposited barium or barium oxide adsorbate surface layer, and (c) a synthesiz…
Phenolic analogues of 2-[4-(2-piperidinoethoxy)phenyl]-3-phenyl-2H-1-benzopyran (1), a novel antiestrogen, were synthesized and evaluated for their structure-activity relationship. Incorporation of OH at position 7 was found to improve receptor affinity of the benzopyran while having no effect on its action as an anta…
Tetrahedrite and tennantite are extremely common in a variety of ore deposits, but the genetic information they record is difficult to decipher because of the limited understanding of their phase relations in multicomponent systems. Most natural compositions can be described by the general formula (Cu,Ag)1e@e,Zn,Cu)2(…
Abstract Clay mineral abundances in Mesozoic and Tertiary argillaceous strata from 15 exploration wells in the Inner and Outer Moray Firth, Viking Graben and East Shetland Basins of the northern North Sea have been determined in <0·2 µm fractions of cuttings samples. The clay assemblages of more deeply-buried sampl…
Based on a number of in- and out-of-reactor experiments at the Chalk River Nuclear Laboratories, a physically based model has been developed to predict the activity release of radioactive noble gases from defected UO2 fuel elements during steady-state reactor conditions. This model has been interfaced with the ELESIM…
The thermal denaturation of wild-type beta-galactosidase and two beta-galactosidases with substitutions at the active site was studied by kinetics, differential scanning calorimetry, electrophoresis, molecular exclusion chromatography, and circular dichroism. From the results, a model is developed for thermal denatura…
Methanolothermal reaction of Cs 2 CO 3 with SnSe, in the presence of SnSe at 160 C and 13 bar yields the selenostannates(IV) Cs 4 Sn 2 Se 6 and Cs,Sn 3 Se 7 . The structure of the latter phase was established by X-ray structural analysis. The crystal structure contains polyselenostannate(IV) sheet anions [Sn 3 Se 7 2-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA planar oxocuprate(II) array via heterometallic alkoxide chemistryJohn A. Samuels, Brian A. Vaartstra, John C. Huffman, Kathleen L. Trojan, William E. Hatfield, and Kenneth G. CaultonCite this: J. Am. Chem. Soc. 1990, 112, 26, 9623–9624Publication Date (Print):December 1, 1…
Abstract The oxidation behaviour of SiC monocrystalline and polycrystalline samples differing by their structure and the impurity content, was studied in O 2 , in air and in O 2 + H 2 O atmospheres, between 1050 and 1400°C. Classical techniques for determining the oxidation kinetics and for analyzing the morphology, t…