Zum Tellurbogenspektrum

Abstract

Die yon J. E. Ruedy gegebene Termordnung des Te I-Spektrums wird ge~ndert. Es werden die meisten der bisher unklassifizierten Te-Linien eingeordnet und das Termschema vervollst~ndigt.

Anodic Behavior of Lithium in Aqueous Electrolytes: II . Mechanical Passivation

“…In brief, to prepare an unformed battery plate, the paste is pressed into a lead alloy grid, and the plate is then allowed to stand or "cure" to oxidize most of the free lead and to develop various basic sulfates 9 The chemistry of basic sulfates has received considerable attention. The thermodynamics of these compounds were discussed by Barnes and Mathieson (5), and the phase changes and the chemistry of the curing processes were reviewed by Ritchie and co-workers (2), and have been discussed and reviewed by others (1,6,7). Specific curing techniques and practical instructions are available (1,2,6) and it has been generally summarized (1, 2, 6, 7) that plates cured by drying at ambient conditions or at slightly elevated temperatures and humidities develop PbO 9 PbSO4 and 3PbO 9 PbSO4 9 H20 as the principal basic sulfates while those cured at higher temperatures (above 70~ and humidities principally develop 4PbO.…”

“…where DI is the diffusion coeffieien~ of Li + in the porous oxide medium and C(x,t) the concentration of Li + within the medium. It is subject to the following boundary conditions nFA metal surface) [7] Using the Laplace transform technique and considering galvanostatic polarization, i.e., i (t) = i (constant), Eq.…”

“…Equation [8] represents the concentration profile of Li + within the porous oxide medium and satisfies all the boundary conditions given under [5], [6], and [7].…”

Observation et Classification du Spectre d'Arc du Tellure (Te I) entre 3 678 et 11 761 cm-1

“…L'analyse faite par cet auteur utilise les observations ultraviolettes de McLennan [l] entre 30 000 et 60 OOO cm-', et ses propres observations dans le visible et l'infrarouge photographique entre 11 000 et 20 OOO cm-l. 0. Bartelt [3] en 1934 proposa une classification en desaccord sur plusieurs points avec celle de Ruedy. Des observations plus prCcises s'averaient donc nkessaires pour tclaircir la situation, et, dans le cadre de l'etude des mktallofdes lourds, nous avons entrepris l'analyse du spectre infrarouge du tellure en utilisant la spectrometrie de Fourier.…”