Materials Literature
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The conductivity, Seebeck effect, and optical transmission of NiO have been analyzed using two alternative models. The first model assumes conduction to occur in the $d$ levels of Ni ions and yields a quantitative fit to the data. Mobility behavior determined with this model is explained in terms of wavy bands. The se…
The Day Book dunite deposit of western North Carolina is a well-exposed ultramafic body representative of dunite deposits in the southern Blue Ridge Province. It was intruded after regional metamorphism had begun, but prior to pegmatite invasion. At the contact of the ultramafic body with the country rock, there is a…
In order to prepare a good secondary electron emitting surface from a silver-magnesium alloy, it was found that baking in dry oxygen would not form the desired surface as originally believed, whereas baking in the presence of water vapor did yield a good secondary emitter. Subsequent experiments showed that, because o…
The general intensity equation for X-rays diffracted by a one-dimensionally disordered crystal with any value of the correlation range s i.e. \(I{=}N\text{Spur}\ \textbf{\itshape V}\textbf{\itshape F}+\sum\limits_{n{=}1}^{N-1}(N-n)\text{Spur}\ \textbf{\itshape V}\textbf{\itshape F}\textbf{\itshape Q}^{n}+\text{conj.}\…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh Temperature Heat Contents of Calcium and Magnesium FerritesK. R. BonnicksonCite this: J. Am. Chem. Soc. 1954, 76, 6, 1480–1482Publication Date (Print):March 1, 1954Publication History Published online1 May 2002Published inissue 1 March 1954https://pubs.acs.org/doi/10.10…
Infrared absorption and photoconductivity in $p$-type germanium with gold and copper impurities have been investigated at different temperatures. Photoconductivity in gold-doped germanium at liquid nitrogen and liquid helium temperatures shows a long wavelength tail beyond the fundamental absorption edge, which falls…
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Summary Expressions are derived for the average elastic constants of a poly-crystalline bar, having circular symmetry about its principal axis, and composed of material with cubic crystal symmetry. It is shown that the differences between these and the corresponding constants obtained for a material with completely ra…
After giving a short review of Nagamiya-Yosida’s theory of antiferromagnetic resonance, it is shown that this theory is equivalent to Gorter-Ubbink’s at absolute zero, so far as the external field H employed in the former is replaced by H′ defined by 2Hx′=gaHx, etc. and the parallel and perpendicular susceptibilities…
Abstract Young's moduli are measured by a simple compression method on plasticized polyvinyl chloride (Vinylite VYNW) compounds containing from 5 to 100% polymer covering a range of approximately seven orders of magnitude in modulus. By comparing values obtained at different temperatures, it is shown that the 60‐secon…
It is shown that a simple theory based on the constant energy loss per unit path length of primary electrons accounts quantitatively for the variation of secondary electron emission yield below its maximum value. The theory can be extended formally to include a Bethe-type energy loss at high primary energies. An attem…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Heats of Hydration of Tricalcium Silicate and β-Dicalcium SilicateStephen Brunauer, J. O. Hayes, and W. E. HassCite this: J. Phys. Chem. 1954, 58, 3, 279–285Publication Date (Print):March 1, 1954Publication History Published online1 May 2002Published inissue 1 March 1954…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyrolysis of Graphitic AcidEitaro MatuyamaCite this: J. Phys. Chem. 1954, 58, 3, 215–219Publication Date (Print):March 1, 1954Publication History Published online1 May 2002Published inissue 1 March 1954https://pubs.acs.org/doi/10.1021/j150513a006https://doi.org/10.1021/j1505…
Present technological developments are making more extensive use of liquid metals as heat‐transfer agents. Their stable and relatively noncorrosive character makes them especially adaptable for high‐temperature applications. The compatibility of various liquid metals with refractories has been investigated in the past…
Makinson's (1938) theory of the lattice component of the thermal conductivity of metals and alloys, when limited at low temperatures by interaction with the conduction electrons, is re-examined, and the magnitude of the lattice conductivity is related to the electronic thermal conductivity at low temperatures, thus av…
Abstract The present paper reports the results of a study of the decomposition product of the ethylamine‐cellulose complex obtained from cotton cellulose. It is shown that the cotton remaining after removal of ethylamine by distillation possesses a crystalline component identical with the ammonia‐cellulose decompositi…
A phase diagram for the zirconia‐titania system is proposed, based on the existence of a hitherto unreported compound, ZrTiOd. Thermal‐expansion and X‐ray diffraction experiments were performed on three series of specimens heated at 980°, 1370°, and 176O°C., respectively.
The lattice constants of sodium, potassium, rubidium, and cesium borohydrides have been measured at 25.0°C as 6.1635±0.0005, 6.7272±0.0005, 7.029±0.001, and 7.419±0.001A, respectively. All four crystals are face-centered cubic and have the sodium chloride structure. Below the transition point (—83°C) sodium borohydrid…
Abstract Es werden die Kraftkonstanten und Bindungsgrade einer Reihe von Sauerstoffsäuren bzw. ihrer Ionen berechnet. Aus den Bindungsgraden lassen sich Strukturformeln ableiten. Im Gegensatz zu den Ansichten der Oktett‐Theorie sind in den meisten Verbindungen Doppelbindungsstrukturen beteiligt. In den Ionen XO n sind…
(1954). Warp Knitting Technology. Journal of the Textile Institute Proceedings: Vol. 45, No. 3, pp. P108-P108.