Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSodium and Potassium Tungsten Bronzes1,1aE. O. Brimm, J. C. Brantley, J. H. Lorenz, and M. H. JellinekCite this: J. Am. Chem. Soc. 1951, 73, 11, 5427–5432Publication Date (Print):November 1, 1951Publication History Published online1 May 2002Published inissue 1 November 1951h…
A method was devised and tested whereby the action of an alkali salt, in the vapor or in the liquid state, on refractory materials may be studied under controlled conditions of temperature and pressure. Using Na 2 SO 4 , the progress of reaction was followed by (1) change of weight, (2) determination of SO 3 by precip…
The internal‐friction peak observed near room temperature in tank plate glass at a period of the order of seconds and previously attributed to sodium ion diffusion is further discussed. The temperature of maximum internal friction is shown to vary with the frequency of vibration with an activation energy of about 16 k…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhosphates of Niobium and Tantalum1Richard B. HahnCite this: J. Am. Chem. Soc. 1951, 73, 11, 5091–5093Publication Date (Print):November 1, 1951Publication History Published online1 May 2002Published inissue 1 November 1951https://pubs.acs.org/doi/10.1021/ja01155a022https://d…
Abstract In unterkühlten Wassertropfen kann die Eiskeimbildung durch ein elektrisches Feld in streng reproduzierbarer Weise hervorgerufen werden. Passende Elektrodenanordnungen (Funke im Luftraum auf die Tropfen bzw. Spitzenwirkung, Elektroden mit Bernsteinhülle, Kondensatoren und Funken in den Wassertropfen selbst) l…
The susceptibility-temperature relation for the antiferromagnetic compound MnSe was measured over a range of temperatures between 70\ifmmode^\circ\else\textdegree\fi{}C and -196\ifmmode^\circ\else\textdegree\fi{}C. Evidence was found of a large thermal hysteresis and a dependence of susceptibility on field strength. A…
A classical treatment of the domain energy terms of a homogeneous ferromagnetic solid leads to a formula for the internal field contributions from these terms. With this result, modifications in the resonance condition of ferromagnetic resonance arising from self energy, exchange energy, magnetocrystalline anisotropy,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTColor and Constitution. X.1 Absorption of the Merocyanines2L. G. S. Brooker, G. H. Keyes, R. H. Sprague, R. H. VanDyke, E. VanLare, G. VanZandt, F. L. White, H. W. J. Cressman, and S. G. Dent Jr.Cite this: J. Am. Chem. Soc. 1951, 73, 11, 5332–5350Publication Date (Print):Nov…
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From a study of well-crystallized graphites direct evidence is obtained of the different spacings between oriented and disoriented layers, respectively, in a stack of parallel graphite layers. It is shown that when the proportion of disoriented layers is small there is practically a linear relation with the mean inter…
It is proposed that annealing twins form during grain growth as a result of a decrease in the interfacial free energy of grain boundaries that would not be achieved in the absence of twinning. Experiments designed to permit detection of the changes in grain boundary free energy accompanying the formation of twins give…
In order to distinguish whether it is really a ferroelectric or not, the dielectric response of PbZr${\mathrm{O}}_{3}$ ceramic to biasing dc field has been examined. In contrast to ordinary ferroelectrics, an effect is scarcely detected below the Curie point of 233\ifmmode^\circ\else\textdegree\fi{}C even up to a fiel…
It is shown that a dislocation whose Burgers vector exceeds a critical value, of the order of magnitude 10A., is only in equilibrium with an empty tube at its core.This is not the case in metals or other simple crystalline solids, but is likely to be the case in protein crystals, which therefore, unfortunately, do not…
Summary In continuation of a previous paper (Bishop and Hill 1951) it is conjectured that the work done in plastically deforming a polycrystal is approximately equal to that which would be done if the grains were free to deform equally. In conjunction with the principle of maximum plastic work, this enables the yield…