Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic Oxides of Molybdenum(V) and Tungsten(V) with the Ordered Perovskite StructureFrank K. Patterson, Carl W. Moeller, and Roland WardCite this: Inorg. Chem. 1963, 2, 1, 196–198Publication Date (Print):February 1, 1963Publication History Published online1 May 2002Publish…
The "M\"ossbauer" technique was used to measure the internal magnetic fields and isomer shifts of ${\mathrm{Fe}}^{57}$ atoms residing at various sites in the FeSi series. The relative abundances of the various sites present in a given alloy were obtained by measuring the relative intensities of the components in the r…
The temperature dependence of the elastic constants of two single crystals of chromium was investigated from 77 to 500\ifmmode^\circ\else\textdegree\fi{}K. A detailed study was made of the anomalies at the N\'eel temperature, 310\ifmmode^\circ\else\textdegree\fi{}K, and at the low-temperature transition at 120\ifmmode…
Static pressure apparatus has been developed which is capable of pressures up to 200 kbar and transient temperatures up to about 5000°K, using an electric flash-heating technique. At pressures above about 125 kbar and temperatures in the 3000°K range it is found that graphite spontaneously collapses completely to poly…
A complete set of elastic, piezoelectric, and dielectric constants is presented for the sulfides, selenides, and tellurides of zinc and cadmium. The piezoelectric constants for the hexagonal crystals in this group are markedly higher than for the cubic crystals. An elementary model theory applied to these data leads t…
Received 27 December 1962DOI:https://doi.org/10.1103/PhysRevLett.10.84©1963 American Physical Society
The stability of the shape of a spherical particle undergoing diffusion-controlled growth into an initially uniformly supersaturated matrix is studied by supposing an expansion, into spherical harmonics, of an infinitesimal deviation of the particle from sphericity and then calculating the time dependence of the coeff…
A new form of solid germanium, of greater density than ordinary cubic germanium, can be formed by compressing cubic germanium at pressures exceeding 120 kilobars and reducing the pressure back to that of the atmosphere. The crystal structure is tetragonal, with a equal to 5.93 angstroms and c, to 6.98; 12 atoms per un…
Hydroxylysine and hydroxyproline are absent in the calcified proteins of Mytilus. The organic matrices from the calcite layers have a consistently higher ratio of acidic to basic amino acids than the aragonitic shell units. The uncalcified shell units periostracum and outer ligament, have very few acidic residues, whi…
Abstract The main thermoluminescence glow curve, the a, B, y glow curve, of polyethylene irradiated by y-rays at 77 °K has been found to be greatly affected by molecular oxygen absorbed in the material before irradiation. The oxygen removes the B and y peaks almost entirely at low irradiation doses and adds another pe…
A mass spectrometer study was made to compare the transport characteristics of hydrogen and deuterium through hollow, thin walled cylinders of three types of fused quartz. The experiments in the temperature range (300°—1000°C) resulted in the following observations: (1) The permeability of hydrogen (and deuterium) in…
Electrical measurements have been made on CaB6, SrB6, BaB6, YB2, YB4, YB6, and YB12 for the purpose of testing models of the electronic structure of the boron atoms in the four boride types represented. The compounds CaB6, SrB6, and BaB6 were found to be semiconductors. The Hall coefficients of YB2, YB6, and YB12 were…
Abstract The theory of inelastic scattering is studied for the transmission of fast electrons through crystals when the fast electrons are described by Bloch waves so that Bragg reflexion is also considered. Solutions for the wave amplitudes are obtained for the case of small-angle inelastic scattering and it is shown…
The unusual temperature dependence of the elastic moduli and other physical properties of alpha uranium near 43\ifmmode^\circ\else\textdegree\fi{}K which have been previously reported are found to be correlated with changes in atomic position and with cell dimensions. The atom position parameter, $y$, decreases to a m…
The static magnetoelastic coupling in ferromagnetic or antiferromagnetic cubic crystals is analyzed in terms of a general formalism dictated by symmetry considerations. Besides the coupling of the spins to the external strains, resulting in external magnetostriction, the spins can also couple to internal strain modes.…
目的しわにおける繊維のレオロジカルな挙動と, 繊維間の相互作用について, 理論的な検討を加え, しわにおける両者の効果を実験的に分析し, さらに繊維の弾性測定方法のだ当性の検討を試みた.成果 (1) しわ角θ は純粋な繊維の弾性項θ1と繊維の相互作用の項θ2から構成され, θ ≒ θ1-θ2なる関係がなり立つ. (2) θ2は織物に適当なセット処理を施すか, 構成繊維の摩擦係数を低下させることによって, 減少する. (3) θ1は構成繊維の伸長緩和弾性実験における残留ひずみ率P.S.から求まるθe-180 (1-P.S./100) に対応している. (4) しわ付け時間によるしわ角の低下の速さ, および回復時間によるしわの回復速度…
Mitsumata trees may be cut down any day in autumn when they have shed their leaves. The bark of the trees which are cut down in autumn or March of the following year is called fuyu-kawa or the winter bark, while that of the trees are cut down since April is called haru-kawa, or the spring bark. According to tradition,…
Abstract Previous definitions of order (i.e., lateral order) in cellulose materials have been essentially in terms of the experimental method and order has been interpreted as the extent of hydrogen bonding. These definitions are inadequate. Order is defined herein as the difference in free energy of the element of po…
Because of high surface tensional force of molten copper, air atomized copper powders show spherical shape, and such powders have poor pressing properties, exhibiting low green strength.In the manufacture of porous bronze bearing, it is necessary to use copper powder of a substantially lower apparent density, with goo…
From the viewpoint of the surface renewal theory or the film penetration theory, mass transfer in a liquid film was considered.The theoretical equation (6) based on the surface renewal theory was derived by assuming that the surface age distribution should change with contact time and moreover that the liquid surface…