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。
Abstract Das Verhältnis der Bindungsenergie (–E e ) zum Schmelzpunkt (T m ) scheint für die Alkalimetalle annähernd konstant zu sein. Dies gibt einen weiteren Hinweis dafür, daß möglicherweise T m auch anorganischen festen Stoffen korrespondierende Temperaturen darstellt. Theoretisch läßt sich zeigen, daß nach der M O…
International audience
An experiment has been performed which leads to the conclusion that the initial permeability and radio-frequency dispersion in sintered nickel ferrite are due principally to rotation of crystallite magnetic moments in an equivalent anisotropy field. Samples have been prepared by the partial sintering of nickel ferrite…
Aluminum alloys are the anodic members of titanium‐aluminum alloy couples in dilute sulfuric acid solutions in the presence of air. In stronger acid solutions, particularly when air is absent, aluminum alloys are anodic only at the beginning of the immersion period. After an induction period titanium becomes anodic. A…
A method for electrodeposition of protective titanium coatings on steel and other base metals is described. The procedure involves electrolysis of potassium titanium fluoride dissolved in alkali or alkaline earth halides under an inert atmosphere. Graphite or titanium metal anodes are employed. Adherent titanium coati…
When the activator ions in a phosphor have a charge different from that of any ions in the host lattice, it is generally agreed that charge compensation must take place. A new theory of luminescent centres is proposed in which the compensation of charge, by lattice vacancies or by activator ions, is localized in the v…
The film responsible for passivity when iron is immersed in concentrated nitric acid is shown to be ferric acid or a related higher valence iron compound. This was proved ( a ) by demonstrating formation of chromates when a 2.84% Cr‐Fe alloy is passivated, ( b ) by showing complete suppression of the iron‐nitric acid…
Preparation of commercially pure titanium metal powder by electrolysis of in molten is described. The process is carried out under an inert atmosphere in an all‐graphite cell. Operating conditions of the electrolysis and their effect upon the metal so produced are discussed. Preparation of the and the electrolytic pro…
Research on the dielectric strength of high-voltage cables can be very conveniently carried out on "models". Either plate or cylindrical capacitors can be used for this purpose. This paper reports the results of many tests both at power frequency and at impulse, which have the purpose of investigating the separate and…
A study has been made of the mechanism of the reaction taking place when zinc is anodically treated in potassium hydroxide solutions. The zinc‐containing ion present in solution as a result of the anodic treatment is . However, zinc oxide or hydroxide is an intermediate leading to the formation of . This latter ion th…
The reaction of nickel with molten sulfur between 205° and 445°C follows the parabolic law. Up to 260°C the millerite form of was the only sulfide detectable in the scale. At 340°C and higher, the high temperature B8 form of was the only sulfide in the scale. The activation energy (Arrhenius) below approximately 300°C…
D. H. R. Barton and E. Miller, J. Chem. Soc., 1955, 1028 DOI: 10.1039/JR9550001028
J. C. McCoubrey, Trans. Faraday Soc., 1955, 51, 743 DOI: 10.1039/TF9555100743
M. Leitner, Trans. Faraday Soc., 1955, 51, 1015 DOI: 10.1039/TF9555101015
C. Eaborn and N. H. Hartshorne, J. Chem. Soc., 1955, 549 DOI: 10.1039/JR9550000549
It is a well-known fact that many species of wild plants are characteristic of limestone and other base-rich neutral soils and are loosely termed calcicoles, and there is a corresponding group characteristic of acid soils poor in bases termed calcifuges. In this paper is reported an attempt to discriminate between som…
The term ferroelectricity is briefly introduced and the properties of the perovskite-structure mixed-oxide group are reviewed with special reference to BaTiO 3 . The distinction between piezoelectricity and electrostriction is explained in some detail, and the relevant expressions relating the electrical and mechanica…
Abstract Cellulose löst sich in Kupferäthylendiamin („Cuën”︁) schneller und ist gegen Luftsauerstoff beträchtlich unempfindlicher als in Cuoxam. Im Gegensatz zu amerikanischen und französischen Arbeiten wurde festgestellt, daß Lösefähigkeit und Viskositätszahl weitgehend unabhängig von der Zusammensetzung des Komplexe…
Abstract Beim Abbau des Polymethacrylsäuremethylesters durch Ultraschallwellen entstehen langkettige freie Radikale, die mit gleichzeitig vorhandenem α,α‐Diphenyl‐β‐pikryl‐hydrazyl (DPPH) reagieren. Erfolgt der Abbau unter Ausschluß von Sauerstoff, werden pro gespaltene Bindung zwei Moleküle DPPH verbraucht. Spektrosk…
Alloying elements commonly found in steel were added to pure iron to establish their effect on hydrogen overvoltage and corrosion rate in 0.1 M citric acid ( p H 2.06), 0.1 M malic acid ( p H 2.24), and 4% sodium chloride at p H 1 and 2. Sulfur, phosphorus, and carbon proved detrimental to corrosion resistance. Copper…