Influencia de la distribución de huecos sobre la resistencia al hielo de los productos cerámicos
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Materials Literature
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Pinturas de aluminio
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Some methods of finishing coîicreie surfaces and making good effects
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Some effects of carbon dioxide on mortars and concrete
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Bibliography
Regulación del calor y del aire en los hornos rotatorios de vía húmeda
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Reinforcing cages for concrete pipe formed on machine producing multiple sizes
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Comportamiento de las fibras minerales sintéticas en el hormigón
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Factors affecting strength of clays in the temperature range 110 to 800%
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The Kinetics of the Thermal Decomposition of Potassium Nitrate and of the Reaction between Potassium Nitrite and Oxygen1a
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Kinetics of the Thermal Decomposition of Potassium Nitrate and of the Reaction between Potassium Nitrite and Oxygen1aEli S. FreemanCite this: J. Am. Chem. Soc. 1957, 79, 4, 838–842Publication Date (Print):February 1, 1957Publication History Published online1 May 2002Publ…
Effect of Isotopes on Low-Temperature Thermal Conductivity
An analysis of the experimental results of the low-temperature thermal conductivity of single crystals of Si, Ge, and KCl indicates that their maximum conductivities are limited by isotope scattering of phonons rather than by umklapp processes. The isotope scattering in solid helium and sapphire is sufficiently low so…
Classification of perovskite and other ABO3-type compounds
A classification of A +2 B+'03 com pounds has been made on t he basis of ionic radii of the cons tituent ions. A grap h of t his type for t he perovski te compounds can be ~ivide d in~o orthor hombic, pseud ocubic, a nd cubic fi elds, wit h an area of ferroelectn c and antlferroelectnc compounds s uperimposed on the c…
Electrostatic Considerations in BaTiO3 Domain Formation during Polarization Reversal
Merz's picture of spike-shaped domains of reversed polarization emerging from an electrode is analyzed with particular attention to its electrostatic aspects, taking into account the inhomogeneous piezoelectric distortions which accompany domain formation. The depolarization energy of a domain is evaluated. The intera…
Studies of the Jahn-Teller effect. I. A survey of the static problem
Abstract According to the Jahn-Teller theorem, symmetrical molecules with degenerate electronic states are unstable. Such molecules therefore take up a distorted shape. If there is near-degeneracy, the symmetrical shape may also be unstable. We have studied the distortion in some particular cases. The approach is to m…
Hyperfine Structure ofCu63andCu65
The hyperfine splittings of the electronic ground states of the stable copper isotopes ${\mathrm{Cu}}^{63}$ and ${\mathrm{Cu}}^{65}$ have been measured by the atomic beam magnetic resonance method. The magnitudes of these splittings are $\ensuremath{\Delta}\ensuremath{\nu}({\mathrm{Cu}}^{63})=11733.83\ifmmode\pm\else\…
THE DEVELOPMENT IN VITRO OF CHIMERIC AGGREGATES OF DISSOCIATED EMBRYONIC CHICK AND MOUSE CELLS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
Magnetostatic Modes in Ferromagnetic Resonance
It has been found recently that in ferromagnetic resonance experiments performed in inhomogeneous rf exciting fields at a fixed frequency, absorption of power takes place at a number of distinct magnetic fields. This is ascribed to the existence of long-wavelength modes of oscillation of the ferromagnetic sample. The…
Effects of Cold Working on Precipitation in Age-hardenable Alloys (1st Report). On the Copper Alloys
Exper ments have been carried out to examine the effects of cold-working on the rate of precipitation in binary polycrystalline Cu-Ti, Cu-Cr and Cu-Fe alloys by measurements of electrical resistance, microhardness and thermoelectromotive force. In Cu-Ti alloys (1.72%Ti), in which the existence of the intermediate phas…
Studies On Copper Alloys Containing Chromium (2nd Report). On the Softening and Age-hardening of Copper Alloys Containing Chromium
Samples of copper alloys containing chromium up to 1.02% were prepared by vacuum melting and casting with which the author studied the effects of chromium addition upon the softening temperature and mechanical properties at elevated temperatures, furthermore the effects of quenching temperatures, aging conditions and…