Materials Literature
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A DESCRIPTION IS GIVEN OF THE APPARATUS FOR MAKING HIGH-PRECISION MEASUREMENTS OF THE VELOCITY OF AN ULTRASONIC PULSE IN CONCRETE. THE USE OF THIS VELOCITY (THE LONGITUDINAL-WAVE VELOCITY) AS A CRITERION OF QUALITY IS DISCUSSED WITH REFERENCE TO SUCH CONVENTIONAL CRITERIA AS THE MODULUS OF RUPTURE, COMPRESSIVE STRENGT…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of Surface Active Agents in WettingFrederick M. FowkesCite this: J. Phys. Chem. 1953, 57, 1, 98–103Publication Date (Print):January 1, 1953Publication History Published online1 May 2002Published inissue 1 January 1953https://pubs.acs.org/doi/10.1021/j150502a021https://d…
J. F. Brown, D. Clark and W. W. Elliott, J. Chem. Soc., 1953, 84 DOI: 10.1039/JR9530000084
The experiments described test the theory of fine-particle magnets. Particles of Fe, Co, and Ni, of size 100-2000A, were prepared by electrodeposition into a mercury cathode. Their sizes and shapes were determined with an electron microscope. Experiments on coercive force $\mathrm{vs}$ particle size show, in general a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Preparation of Other Borohydrides by Metathetical Reactions Utilizing the Alkali Metal Borohydrides1H. I. Schlesinger, Herbert C. Brown, and Earl K. HydeCite this: J. Am. Chem. Soc. 1953, 75, 1, 209–213Publication Date (Print):January 1, 1953Publication History Published…
The general behavior of magnetite (iron ferrite) at its low temperature transformation ($\mathrm{ca}$ 118\ifmmode^\circ\else\textdegree\fi{}K) is reviewed. One of the properties which undergoes a large change is the magnetocrystalline anisotropy, which is larger in magnitude and has a lower symmetry below the transfor…
Summary Proofs are given of theorems stated in the Bishop-Hill theory of crystal distortion. Mathematical relations are established for the deformation of crystals by simultaneous shears, and the possibility of enforcing an arbitrary strain by glide is examined. The uniform stress states not exceeding the critical she…
The spin-lattice relaxation time, ${T}_{1}$, has been determined in single crystals of nickel ferrite, by using the ferromagnetic resonance effect at a frequency of 9000 Mc/sec. At high levels of microwave power, the saturation effect is observed both in the resonance absorption and in the component of magnetization a…
R. W. Pittman, J. Chem. Soc., 1953, 3888 DOI: 10.1039/JR9530003888
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIndustrial FluorochemicalsJames O. HendricksCite this: Ind. Eng. Chem. 1953, 45, 1, 99–105Publication Date (Print):January 1, 1953Publication History Published online1 May 2002Published inissue 1 January 1953https://pubs.acs.org/doi/10.1021/ie50517a034https://doi.org/10.1021…
Surface oxidation products on various alloys due to varying oxidizing conditions within the range of 300–900°C for temperature and 10 -4 –760 mmHg. for air pressure are studied by the electron diffraction method. Alloys studied are copper alloys containing 0.3 % Be, 0.5 % Al, 0.1 % Mg, 7 % Mn and 7 % Ni and that of ir…
R. N. Bennett, P. D. Ritchie, D. Roxburgh and J. Thomson, Trans. Faraday Soc., 1953, 49, 925 DOI: 10.1039/TF9534900925
The triclinic structure of Mg~(OH)aC1.4H20 has been studied by the method of isomorphous replacement. Atomic positions were derived from a :Fourier (010) projection based on powder data, together with such information as could be gathered from the more or less diffuse (hkl) reflexions.
R. J. W. Le Fèvre and J. Northcott, J. Chem. Soc., 1953, 867 DOI: 10.1039/JR9530000867
B. A. Toms and D. J. Strawbridge, Trans. Faraday Soc., 1953, 49, 1225 DOI: 10.1039/TF9534901225
Copper reacts readily with aqueous ammonia in the presence of oxygen, as follows: Cu + 1 / 2 O 2 + 4 NH 3 aq + HOH − → Cu NH 3 4 + + + 2 OH − . The kinetics of this reaction were investigated over a wide range of NH 3 and NH 4 + concentrations, oxygen pressures, temperatures, and stirring velocities. The rate of disso…
P. P. Birnbaum, J. H. Linford and D. W. G. Style, Trans. Faraday Soc., 1953, 49, 735 DOI: 10.1039/TF9534900735
This paper surveys current theoretical work on spin-spin and spin-lattice relaxation in ferromagnetic substances with reference to ferromagnetic resonance. It is shown that it is possible to give a reasonable explanation of the principal features of the experimental results. The calculations, carried out for nickel in…
A report is given of recent investigations of anodically formed coatings on magnesium, zinc, and cadmium in and solutions. The growth of the coatings was followed by means of x‐ray and electron diffraction and electron microscopy. It was found that the metal oxide was favored as initial product. Depending upon the rel…