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。
Les parametres cristallins a et c augmentent avec la concentration en Cs depuis a=10,1688 et c=2,9595 A dans Cs 0,40 Ba 0,79 Ti 8 O 16 a 5 K jusqu'a a=10,2682 et c=2,9643 A dans Cs 1,36 Ti 8 O 16 a 5 K. La dilatation est isotope seulement dans Cs 1,36 Ti 8 O 16 avec 8.10 −6 K −1 a 300 K. Etude de l'influence de la pre…
Amorphous N2O4 solid was formed on predeposited oxygen or krypton layers. Evaporation of the underlying layer and redeposition of the inert impurities resulted in decomposition of the ionic nitrosonium nitrate clusters within the solid nitrogen tetroxide. Infrared features indicate NO+NO−3 decomposition to occur via m…
A system was assembled which can perform high-sensitivity partial discharge (PD) measurements under combined electric stress and X-ray irradiation on 138-kV class gas-insulated switchgear (GIS) post insulators. Under X-ray irradiation, the PD pulse repetition rate is increased and the discharge inception voltage (DIV)…
An investigation has been made of the solid state constitution of the titanium rich portion of the Ti–Al–C system; partial isothermal sections have been established at 1250, 1050, and 750°C by means of electron microscopy (including energy dispersive X-ray analysis) and X-ray diffraction. In addition, a schematic liqu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure of native celluloseYasuhiro Takahashi and Hideki MatsunagaCite this: Macromolecules 1991, 24, 13, 3968–3969Publication Date (Print):June 1, 1991Publication History Published online1 May 2002Published inissue 1 June 1991https://pubs.acs.org/doi/10.1021/ma000…
The coated particle fuel has been developed within a framework of the HTTR (High Temperature engineering Test Reactor) Development Program at the Japan Atomic Energy Research Institute. The HTTR fuel is a prismatic block type containing TRISO-coated U02 particles. Research and development on the fuel has been progress…
X‐ray photoelectron spectroscopy (XPS) spectra were measured for the high‐temperature forms (quenched from 1500°C) of zirconium titanate and its solid solutions, the low‐temperature forms (quenched from 1000°C), and cubic Ba(Zr 1/2 Ti 1/2 )O 3 . Two distinct differences in the XPS spectra were noted between the high‐…
An aperture-limited, differentially pumped environmental cell has been developed and installed in a JEOL 4000 EX electron microscope. With this environmental cell it is possible to observe, at high spatial resolution, the detailed changes in microstructure that occur during the interaction between a solid and a gaseou…
Transmission and reflection spectra in the range of 0.5–4.1 eV have been obtained for HxWO3 polycrystalline thin films of 5-nm mean grain size. The composition range x=0–0.16 has been investigated. The measurements were refined to give the absorption coefficient and other optical parameters versus photon energy. The d…
Dissolution rates of different glasses in buffered solutions of constant pH of 7 were measured by weight change, profilometry, and ion implantation with Rutherford backscattering. Rates with different techniques agreed within experimental error. Natural obsidian glass dissolved most slowly, at a rate comparable with t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibrium between homocub-1(9)-ene and homocub-9-ylideneNing Chen, Maitland Jones Jr., Walter R. White, and Matthew S. PlatzCite this: J. Am. Chem. Soc. 1991, 113, 13, 4981–4992Publication Date (Print):June 1, 1991Publication History Published online1 May 2002Published ini…
The electronic-structure calculations of the perovskite oxides ${\mathrm{SrFeO}}_{3}$ and ${\mathrm{SrCoO}}_{3}$ in the nonmagnetic and magnetic phases are reported here. The calculations were performed with use of the self-consistent linear muffin-tin-orbital method within the atomic-sphere approximation. The calcula…
This paper presents a model which predicts glass structures based on local charge balance considerations. The model is shown to be consistent with known structures of borate, aluminate, and boroaluminate crystals and predicts that boroaluminate glasses should contain 3‐ and 4‐coordinate boron, 4‐, 5‐, and 6‐coordinate…
An unambiguous comparison for the magnification factor, M, in field emission is derived by solving rigorously Laplace equations for the cases of individual prolate ellipsoids (cones) of revolution on one side, and for an elliptical wedge on the other side, under the assumption that a uniform electric field exists at s…
Abstract Pacific red clays are dominantly allogenic in origin. The allogenic component is derived principally from aeolian dust from central Asia, Australia, and Central America. The highest input of dust is from central Asia. Sedimentation rates of red clays are therefore higher in the North Pacific than in the South…
The semiquantitative estimations of 980°C exothermic reaction products of kaolinite by quantitative X‐ray diffraction (QXRD) and chemical leaching techniques show the formation of a significant amount of amorphous aluminosilicate phase (∼ 30 to 40 wt%). The theoretically expected AlO 4 /AlO 6 ratio in the 980°C reacti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of thermal curing on the structures and properties of aromatic polyimide filmsJwo Huei Jou and Peir Teh HuangCite this: Macromolecules 1991, 24, 13, 3796–3803Publication Date (Print):June 1, 1991Publication History Published online1 May 2002Published inissue 1 June 19…
Microstructural evolution in high purity nickel was investigated by comparing the dislocation substructures formed following torsion deformation with those following rolling. Results from transmission electron microscopy observations and measurements of microdiffraction show a common evolutionary path in rolling and t…
The crystal structure of cimetidine (C10H16N6S) has been solved and refined from high-resolution synchrotron X-ray powder data collected on station 8.3 at Daresbury Laboratory. The structure is monoclinic, P21/n, Z = 4, a = 10.7029 (3), b = 18.8262 (1), c = 6.8266 (2) Å, β = 111.306 (2)°. The data were auto-indexed an…
Abstract Polymer alloys and blends represent one of the fastest growing sectors of the plastics industry. To a large degree, the emphasis has now shifted from developing blends in the reactor to their creation through melt mixing on processing equipment such as extruders. As a result, intense activity is now being dir…