Materials Literature
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For the past twenty-five years, a single oriented silicon steel containing 3% silicon has been commercially produced. The crystallographic description of this material is usually given as (110)[001]. It is now generally agreed that this texture occurs because of a preferred type of secondary recrystallization occurrin…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Gerard Kraus; Swelling of Filler-Reinforced Vulcanizates. Rubber Chemistry and Technology 1 March 1964; 37 (1): 6–13. doi:…
The compounds CaSc 2 O 4 and SrSc 2 O 4 were synthesized by solid‐state reaction of the component oxides at temperatures ranging from 950° to 1400°C. Both calcium and strontium monoscandates are orthorhombic and analogous to CaFe 2 O 4 . Lattice parameters for CaSc 2 O 4 a re a o = 9.461, b o = 11.122, c o = 3.143 and…
The thermal conductivity (λ) of a polycrystalline gadolinium sample, having an electrical resistivity of 2.41 μΩ cm at 4.18°K, has been studied as a function of temperature (T) between 5° and 310°K. The thermal conductivity has a maximum value of 0.333 W cm−1 °K−1 at 16.5°K. Changes in the slope of the λ vs T curve oc…
Mit einem Feldionisations-Massenspektrometer wurden die Ionen registriert, die sich an Spitzen aus W. Pt, Ir bilden, wenn H 2 O-Dampf in die Ionenquelle eingelassen wird. Die Ionenströme setzten oberhalb einer für das jeweilige System charakteristischen Grenzfeldstärke sprunghaft ein (W-Spitze/H 2 O : 20 MV/cm, Ir-Spi…
The mass wear per centimetre M and the friction coefficient μ of metals during abrasion on a relatively rigid hard rough surface are studied experimentally at 1 kg load and a speed of a few centimetres per second. `Smooth-cut' steel files were used as the abrasive surface, cleaned carefully by scratch-brushing rather…
Abstract The thermal dehydrochlorination of PVC has been examined on some samples prepared by fractionation of a commercial PVC, and some other samples obtained by polymerization at different temperatures. The results disagree with the concept of a continuous dehydrochlorination from one side to the other of the chain…
Alkali halide crystals and pressed disks doped with divalent europium were prepared and their absorption and fluorescence spectra measured. There are two broad absorption bands in the ultraviolet, peaking at ~250 and 330 mμ, both due to the transition 4f7→4f65d1, and attributed, after comparison with the absorption sp…
The results of magneto-optical measurements on Fe, Co, and Ni over a wide range of frequencies, varying from infrared to ultraviolet, have been analyzed. It is suggested that the magneto-optical phenomena in ferromagnetic metals are caused by the influence of the inner effective magnetic field Hi (which is responsible…
Observations have been made by transmission electron microscopy on the interactions between faulted dislocation loops and moving dislocations in high purity aluminium. Thin single crystals were quenched from 650°c and 540°c into water at 0°c. In both cases most of the loops enclosed a stacking fault. Their average dia…
These experiments were undertaken to determine more precisely the minimum energy Td needed to displace an atom from its lattice position. The resistivity increase as a function of integrated flux was measured at various electron energies. The damage-production curve, thus obtained, was the sum of two components. The f…
Diffuse streak patterns from single crystals which have become to be noticed very recently in electron diffraction are identified with the “non-radial” streak patterns in X-ray diffraction and their description in terms of parallel wall distribution of intensity weight along low index reciprocal net planes is discusse…
Structural defects of natural graphite are characterized by Newton-ring-like electron microscopic contrast. Pictures are given, evidencing their aspect, their peculiar distribution (often corresponding to linear alignment), and their behavior at high temperatures. A discussion is presented concerning related theoretic…
Abstract Dolomitic lime samples differing widely in surface activity (specific surface, 5–65 m. 2 g. −1 ) have been ‘dry’ hydrated by exposure to water vapour at 22° and ‘wet’ hydrated by liquid water at 22° and 95°. In general, the calcium oxide hydrates much more rapidly than the magnesium oxide in the dolimes. Duri…
The method of obtaining vibronic selection rules is described for an isolated impurity rare earth or actinidetype ion in a rare earth or actinide salt for various symmetry points of the Brillouin zone. The method is applied to Pr3+ in LaCl3 and the results used to further interpret the vibronic spectrum previously rep…
New ferroelectric tungsten bronze type solid solutions were found with compositions 0.2≤ x ≤0.4 for Sm and La compounds, and x =0.25 for Y compound. The maximum dielectric constants were observed at about x =0.2 for each system, and corresponding Curie points were 278°C, 189°C and 10°C for Y, Sm and La compounds respe…
The complete set of electroelastic constants of a tetragonal lead titanate zirconate ceramic (PZT-5A) is shown as function of the invariant coupling factor ki3 (and, thus, as function of the thoroughness of poling). Interrelations among the important piezoelectric-coupling factors (k33, k31, kp, kt, ki1 = k15, and ki3…
The electrical conductivity and absolute thermoelectric power of AuSb 2 and Cu 2 Sb have been measured between 2.5° and 300 °K. Room-temperature Hall coefficients were also determined. Iron impurity causes a giant diffusion thermoelectric power at low temperatures in the compound Cu 2 Sb, as it has previously been fou…
Abstract Vermiculite (particles 2 to 0.2 microns in diameter), after being treated with H‐Amberlite IR‐120, aged for 97 days, and suspended in 1 N KNO 3 , showed a third buffer range between pH 5.5 and 7.6 on continuous titration with dilute NaOH. This third buffer range is attributed to neutralization of excess proto…
The Mössbauer technique was used to measure the internal magnetic fields and isomer shifts of Fe57 atoms residing at the various sites in the FeAl series. Alloys of Al content varying from 0 to 50 at. % were studied. In the disordered region (<21 at. % Al) five different type sites were observed, corresponding…