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。
Complexes [Fe2IIIMIIO(MeCO2)6py3]py (M = Mg, Mn, Co, Ni, or Zn; py = pyridine), isomorphous(except for M = Ni) with the mixed-valence compounds [M3O(MeCO2)6py3]py (M = Mn or Fe), are reported; their magnetic properties provide new information about superexchange pathways in the trinuclear basic carboxylate system.
Infrared spectroscopic techniques have been used to study the effects of electron radiation on the polyimide PMDA-p, p'-ODA. The radiation exposures were made at various dose rates for a total dose approximately equal to that for 30 years of exposure to electron radiation in geosynchronous Earth orbit. At high dose ra…
"On the temperature-dependence of the threshold energy for atomic displacement in copper." Radiation Effects, 59(1-2), pp. 103–104
非鉄金属には従来コーキシング効果が見られないとされてきたが, 2017S-T4A1合金には明確なコーキシング効果が存在することがわかった.7 : 3 希鋼には明確なコーキシング効果は認められなかった.これらは, 平滑材における微小き裂のほか, 直径40~200μmの人工微小穴からでた微小き裂の挙動に注目することによって明らかになった.また, 疲労強度の低下に寄与する欠陥法を平滑材の疲労限における微小き裂との対応によって明らかにした.
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Abstract Single crystals of the composition 6 Ca 2 SiO 4 · 1 Ca 3 (PO 4 ) 2 have been grown by the Verneuil-method. The crystals represent a structure derivative of α′ -Ca 2 SiO 4 . Due to twinning of the crystals a structure determination was possible only on the basis of the weak superlattice reflections [ Pnm 2 1 ;…
Scheelite-related α-Ln2Mo3O12(Ln = La, Pr, Nd, Sm, Gd, Tb, or Dy) oxides are reduced by hydrogen at 780–870 K yielding molybdenum (IV) oxides of formula Ln2Mo3O9. The latter crystallize in a tetragonal scheelite (ABO4) type structure where one third of the A sites and a quarter of the anion sites are vacant: Ln2/3(□ca…
The valence-electronic structure of the actinide halides UF4, ThF4, UCl4 and ThCl4 has been studied by photoelectron spectroscopy in the gas phase using He II radiation and in the solid state using Al Kα radiation. These investigations show that both in the solid state and in the gas phase the electronic structures of…
The interaction of methanol with clean and oxidized films of Ni, Pd and Al has been investigated in the temperature range 223–450 K. Dissociative adsorption of methanol on the clean films occurred even at 223 K. A substantial fraction of the adsorption on oxidized Al film at 223 K was reversible. Further extensive ads…
Effects of air on the external SGEMP response of a cylinder in the x-ray deposition region (50 to 100 km) are examined. The gross external response of a missile is modeled using an object exposed to a variety of x-ray and air environments. Responses are computed using a macroparticle treatment for both primary and sec…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVapor pressures of bromine-quaternary ammonium salt complexes for zinc-bromine battery applicationsSatya N. BajpaiCite this: J. Chem. Eng. Data 1981, 26, 1, 2–4Publication Date (Print):January 1, 1981Publication History Published online1 May 2002Published inissue 1 January 1…
5 argiles kaolinitiques du Westerwald ont été cuites à différentes températures entre 500 - 1200°C. Les changements minéralogiques ne sont pas très utiles pour des questions d'archéothermométrie dans l'intervalle 600 - 1000°C, sauf si une illite 2 M est présente, dont certains rapports permettent une estimation de la…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew furoxan chemistry. 1. Synthesis of diacylfuroxans by reaction of ethynyl acetates with nitrosyl fluoride nitrosonium tetrafluoroborateDavid R. Brittelli and George A. Boswell Jr.Cite this: J. Org. Chem. 1981, 46, 2, 312–315Publication Date (Print):January 1, 1981Publicat…
A Bouguer anomaly value B is evaluated from a measured gravity value gobs through the formula B=gobs-+FC-BC+TC, (1) where is the normal gravity value, FC the free air reduction, BC the Bouguer correction and TC the terrain correction. The evaluation of (1) requires knowledges of station height h and terrain density 0…
Rubbers are long-chain molecules which are plastic in nature in the raw or unvulcanized state. Vulcanization is an irreversible process by which the predominantly plastic rubber is converted to predominantly elastic and a three-dimensional network structure through the anchoring between two polymer chains. Chemically,…
The gaseous molecule CrPO2 has been investigated in the course of a high-temperature mass-spectrometric Knudsen-cell study of the vapours over an europium–chromium–phosphorus–oxygen system. From the enthalpy of the equilibrium reaction CrPO2(g)= CrO(g)+PO(g) and appropriate ancillary data, the atomization energy of th…
Precipitation of σ phase in an Fe-25Cr-7Ni-3Mo alloy with a duplex structure of α and γ phases, has been studied systematically by means of optical microscopy, X-ray diffraction, hardness measurement, tensile test, SEM observation and dilatometric measurement. The results obtained in this study are as follows: (1) TTT…
We report measurements of the resistive superconducting transitions of NbSe3 as a function of magnetic field for sufficient pressures to destroy the lower CDW. These indicate that NbSe3 is a bulk anisotropic superconductor with a total Meissner effect. The critical field anisotropies are well described by an effective…
The use of electrochemical techniques to measure chemical-diffusion coefficients in solid alloys is reviewed. The theoretical basis and experimental aspects of four different approaches are discussed in detail: the potentiostatic, galvanostatic, potentiometric, and steady- state ac methods. As an example, all four of…
The infrared absorption spectra of natural zeolites of the 7th structural group: heulandite, clinoptilolite, brewsterite, and stilbite were measured. The spectra were taken in the wavenumber region 200—4000 cm by the KBr technique (1 :40). The number and symmetry of individual vibrations were ascertained by theoretica…