Materials Literature
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On compare les propriétés magnétiques (aimantations, points de Curie et susceptibilités) et les résistivités résiduelles de borures de formules générales M1-xM'xB et (M1-xM'x) 2B où M et M' désignent des métaux de la première série de transition, à celles des alliages métalliques M1-xM'x. Cette comparaison fait ressor…
Silicon nitride has very attractive electrical, physical, and chemical properties which are of great interest for microelectronic devices. Until recently, most methods that have been reported in literature produce silicon nitride in the form of powder, needles, ribbons, or flakes. Recently, Sterling and Swann reported…
Abstract The dislocation distribution in the surface layer of cyclically deformed specimens of polycrystalline copper is studied by means of transmission electron microscopy of thin foils, both parallel and nonparallel to the surface. The distribution within the surface layer and near the persistent slip bands is foun…
Abstract A polyamide amino acid was prepared by the solution condensation of 3,3′‐diaminobenzidine and pyromellitic dianhydride. This polymer was cast as a film and converted to a polybenzoylenebenzimidazole. The gross conversion path was elucidated by spectroscopy and was substantiated by model compound studies. A no…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLewis Basicity of Metals. II. The Interaction of Group VI and VII Transition Metal Cyclopentadienyl Derivatives with BF3, BCl3, and B2H6M. P. Johnson and D. F. ShriverCite this: J. Am. Chem. Soc. 1966, 88, 2, 301–304Publication Date (Print):January 1, 1966Publication History…
Infra-red studies of NH3, HCl, CO, C2H4, and butene adsorbed on transparent aerogels were made to elucidate the surface chemistry of nickel/silica and the nature of adsorbed species. In addition to the hydroxyl band found on silica at 3750 cm–1, most “dry” nickel/silica aerogels exhibited a band near 3620 cm–1, appare…
In recent years the rapid advances in the understanding of the nature of chemical bonds and in the application of quantum mechanics to chemical problems have imparted a great impetus to studies of luminescent materials, studies which have been primarily directed toward the elucidation of the electronic structures of t…
Abstract Two kinds of dielectric absorptions due to motion of carbonate groups in polycarbonate were observed. In the primary transition region near 150°C, the shape of e′ versus log frequency curve is little affected by a temperature change, while it becomes more widely spread when the polymer is partially crystalliz…
Abstract A brief review of the different topographic methods is given in order to attempt a classification of the various types of contrast observed. Depending on whether the image is obtained by a reflection or transmission method, is simple or integrated, dynamic, direct, or intermediary, the contrast and image widt…
Aided by a Post Doctoral Fellowship in Brain Research from the United Cerebral Palsy Research and Educational Foundation. Medical Investigator, Howard Hughes Institute.
The work to be described in this paper, is a study of chemical reaction between iron surfaces and various representative extreme pressure (EP) agents, such as chlorine type, sulfur type, Zn-dithiophosphate type, and the mixture of sulfur and chlorine type EP agents, by using the hot wire method. It has been observed t…
Abstract When heated to high temperatures under zero tension, some of the molecules in oriented nylon 66 filters change from the elongated to the folded conformation, with no change in crystal orientation. This transformation is shown by a combination of structural and physical property measurements: wide and small an…
Abstract Durch Aufdampfen auf atomar ebenes und reines Cu(111) wurden sehr dünne, flächenhafte Ni(111)‐Epitaxieschichten hergestellt. Der Atomabstand von Ni in der Schichtebene gleicht sich dabei oberhalb 10 Å partiell, unterhalb 10 Å bei einer Dehnung von 2,5% vollständig an den der Cu‐Unterlage an („Pseudomorphie”︁)…
Abstract An attempt was made to evaluate the apparent elastic constant of a two‐phase system G from those of the components of the system. The modulus G is expressed as follows: where G 1 and G 2 are the shear moduli of the suspending medium and the suspended particles, respectively, v 1 is the Poisson ratio of the me…
A model for F-centre production in alkali halides by ionizing radiation is discussed. The energy required for the formation of the defect is given to an anion in the radiationless recombination of an electron and a hole, which takes place via an exciton state. The primary products of this mechanism are negative ion in…
Abstract Measurements of the thermoelectric power, transverse Nernst‐Ettinghausen effect, conductivity, and Hall effect allow the concentration and temperature dependence of the electronic effective mass m * to be calculated for crystals of the solid solution (InSb) x (InTe) 1—x (for × = 1 to 0.85) in the temperature…
Eleven amine complexes of zinc benzothiazole-2-thiolate have been prepared from the ammonia complex. Dissociation of the pyridine complex provides a convenient route to the thiolate, which is difficult to prepare by other methods.
本文用X射线衍射的方法全面地研究了Cu-Au二元系合金经不同时间(一个月、三个月、六个月、一年)熟炼后缓冷到室温,以及在300℃和600℃淬炼后的物相与相转变过程;精确地测定了点阵间隔,以研究其随成份和热处理的变迁;探讨了长周期超结构的堆垜周期同成份和温度的关系;并用保持不同热处理时间后淬炼的方法来研究等原子成份处的有序化过程。在上述的热处理条件下,整个二元系共出现了六种不同的相:α1是Au在Cu中的固溶体,α′1是相当于Cu3Au的超结构,α2是Cu在Au中的固溶体,α′2是相当于CuAu3的超结构,k是相当于CuAuⅠ的超结构,k′是相当于CuAuⅡ的超结构。值得注意的是,随着热处理时间的加长,有序区逐渐扩大,二相区逐渐缩小,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBroad-Line Proton Magnetic Resonance Spectra of Dichloro (1,2,4-triazole) copper (II) and Bis (1,2,4-triazolato) copper (II)Motomichi Inoue and Masaji KuboCite this: Inorg. Chem. 1966, 5, 1, 70–73Publication Date (Print):January 1, 1966Publication History Published online1 M…
Abstract Summarizing investigations on the solubility, nucleation and growth of NaCl in presence of K 4 Fe(CN) 6 are reported. Raising the contents of K 4 Fe(CN) 6 induces at first the formation of cubes, then skeletal forms and finally suppression of nucleation and growth for the duration of the experiment. Secondary…