The Dynamic Behavior of Thermoelectric Devices
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The Structure of Bismuth at Low Temperatures
A precision determination of the displacement parameter of zone-refined bismuth containing less than 0�3 parts per million of spectroscopically detectable impurity has been carried out as a function of temperature. Procedures were used that minimize uncertainties in integrated intensities due to extinction, absorption…
Preparation and Refining of Yttrium Metal by Y-Mg Alloy Process
Yttrium metal was prepared by the reduction of YF 3 with calcium forming a low melting Y‐Mg intermediate alloy. Magnesium was removed by sublimation to produce yttrium metal sponge. A method is described for removing oxygen and fluorine from the alloy by extraction with fused yttrium salts. The results of electron bea…
33. Phthalocyanine crystal spectra
L. E. Lyons, J. R. Walsh and J. W. White, J. Chem. Soc., 1960, 167 DOI: 10.1039/JR9600000167
Studies on Lead Silicate Melts
Studies on the constitution of silicate melts are very important not only in the fields of metallurgical processing or the glass industry, but also in dealing with the properties or constitution of liquids. For this reason a PbO-SiO2 system was chosen as a model of silicate or slag because of its low melting point and…
Nonuniform Field Effects in Poorly Conducting Media
A simplified theory of the behavior of suspended polymer particles in a real liquid dielectric is presented. It is becoming well known that nonuniform fields exert an attractive force of interesting magnitude on particles of high dielectric constant suspended in a liquid medium of lower dielectric constant. In a real…
Réactions (p, xn) induites dans l'or par des protons de 155 MeV
Nous avons étudié les sections efficaces des réactions (p, xn) pour la formation des isotopes du mercure, de masse comprise entre 197 et 188, séparés par déviation magnétique. Nous avons identifié, mesuré les périodes et l'énergie des principales raies γ des 190Hg, 189Hg, 188Hg et de leurs descendants.
212. Dithiols. Part XXI. Dithiols from cyclic trithiocarbonates
S. M. Iqbal and L. N. Owen, J. Chem. Soc., 1960, 1030 DOI: 10.1039/JR9600001030
THE CHEMISTRY OF BORAZINE. III. B-SILYL BORAZINES
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE CHEMISTRY OF BORAZINE. III. B-SILYL BORAZINESA. H. Cowley, H. H. Sisler, and G. E. RyschkewitschCite this: J. Am. Chem. Soc. 1960, 82, 2, 501–502Publication Date (Print):January 1, 1960Publication History Published online1 May 2002Published inissue 1 January 1960https://…
Studies in Lithium Oxide Systems: VII, Li 2 O–B 2 O 2 –SiO 2
Phase relations in the system Li 2 O–B 2 O 3 –SiO 2 were studied by quenching and solid‐state reactions. No ternary compounds were detected in the portion of the system containing less than 53% Li 2 O. Compatibility triangles were formed from the binary borate and silicate compounds. Liquidus data obtained by quenchin…
The crystal structure of zunyite
Zunyite, a rare aluminosilicate mineral of composition (OH, F)18Al13Si5O20Cl, has an unusual structure built up of Si5O16 groups of linked silicon tetrahedra and aluminium-oxygen groups of linked octahedra. The structure proposed by Pauling is verified and refined by X-ray methods, using 163 (hkO) reflections from sin…
Lineare und cyclische Oligomere
Abstract Zusammenfassend wird über die Grundlagen der Oligomerenchemie und ihre Bedeutung für die makromolekulare Chemic berichtet, also über Synthese, Eingenschaften, Vorkommen und Isolierung aus Polykondensaten sowie das Verhalten unter Polymerisationsbedingungen; insbesondere an Hand von eigenen Arbeiten auf dem Ol…
1007. Anionic polymerization of styrene: conductivity measurements
D. J. Worsfold and S. Bywater, J. Chem. Soc., 1960, 5234 DOI: 10.1039/JR9600005234
A Structural Study of Talc and Talc‐Tremolite Relations
About forty specimens of talc have been examined by X‐ray powder methods. Variations in the degree of crystallinity of the mineral have been observed, but no evidence has been obtained for polymorphic structural varieties. Single‐crystal data have confirmed the two‐layer mono‐clinic cell. Little evidence has been obta…
Diffusion of Impurities in Amorphous Polymers
The data of Ryskin on diffusion of impurities into amorphous polymers appear to be consistent with the prediction of elastic continuum theory that the ratio of the entropy of activation, ΔS‡, to the enthalpy of activation, ΔH‡, is independent of the nature of the diffusing impurity. The ratio, ΔS‡/ΔH‡, depends only on…
Thermodynamic Properties of the Aluminum-Silver System
An electrode potential study of the liquid aluminum‐silver system has been conducted with the cell in the temperature range 700°–980°C. The activities of both components, , , , and were determined for 700° and 900°C, and and for the temperature range of 700°–980°C. The activity curves are found to be similar in shape…
Kinetics of the Surface Degradation of Polymethylmethacrylate
The surface degradation of both linear and crosslinked polymethylmethacrylate (PMM) has been studied over the surface temperature range of 550° to 910°K by means of a hot-plate pyrolysis technique. It was demonstrated that surface gasification due to the high heat flux at the decomposing PMM surface involves a depolym…
Model for Switching and Polarization Reversal in Colemanite
The characteristic properties of the displacement current transients obtained from ferroelectric colemanite crystals during polarization reversal are presented in detail. A phenomenological and semiempirical model of the switching mechanism is proposed. The model yields good agreement with the switching current depend…
Dislocation-locking by carbon, nitrogen and boron in α-iron
It is shown experimentally that nitrogen-looking is appreciably stronger than carbon-locking. This is contrary to the customary assumption and it is suggested that there may be chemical as well as elastic interaction with the dislocations. Boron is found to produce even stronger looking than nitrogen. These variations…
ADSORPTION EQUILIBRIA OF HYDROGEN, DEUTERIUM, AND THEIR MIXTURES. PART I
Adsorption isotherms of hydrogen and deuterium have been measured at temperatures of 75–90 °K and pressures up to 760 mm Hg on the following six adsorbents: charcoal (2), silica gel, and Linde molecular sieves type 4A, 5A, and 13X.Deuterium was found to be adsorbed to a greater extent than hydrogen in all cases invest…