Materials Literature
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A modified slot discharge detection method, which permits tests without Shutting down the machine or using auxilliary high-voltage test equipment, was investigated. The method involves connection of frequency sensitive equipment across all or part of the ntral impedance. Tests on eight vertical water wheel generators…
Measurements of the dark electrical conductivity σ, and Hall coefficient were made on sintered spectroscopically pure zinc oxide powder samples over a temperature range from 100°K to 625°K and at room temperature on zinc oxide crystals containing lead impurities, using both the usual dc potentiometer-probe method and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMelting and Glassy State Transitions in Cellulose Esters and their Mixtures with Diluents1,2Leo Mandelkern and Paul J. FloryCite this: J. Am. Chem. Soc. 1951, 73, 7, 3206–3212Publication Date (Print):July 1, 1951Publication History Published online1 May 2002Published inissue…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConcentration of Radioactive Liquid Waste by EvaporationG. E. McCulloughCite this: Ind. Eng. Chem. 1951, 43, 7, 1505–1509Publication Date (Print):July 1, 1951Publication History Published online1 May 2002Published inissue 1 July 1951https://pubs.acs.org/doi/10.1021/ie50499a0…
THERE ARE formulas available by which it is possible to calculate the peak of the first cycle of magnetizing inrush current for a transformer. There have been no convenient formulas available for determining the maximum values of successive cycles of current. The usual approach has been to use a step-by-step process o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow Temperature Oxidation of Copper. II. Reaction Rate Anisotropy1T. N. Rhodin Jr.Cite this: J. Am. Chem. Soc. 1951, 73, 7, 3143–3146Publication Date (Print):July 1, 1951Publication History Published online1 May 2002Published inissue 1 July 1951https://pubs.acs.org/doi/10.10…
Abstract Films of polyamides were exposed to heat, ultra‐violet radiant energy, and different atmospheric conditions. The degradation products were collected in some cases and analysed by mass‐spectrometric techniques. The unexposed and exposed specimens were examined by the following techniques to obtain information…
It is shown that the conductivity in the ohmic part of the cuprous oxide layer can be explained with the usual band picture of semiconductors only by assuming the presence of some donor-type impurities in addition to the usual acceptor type. The energy difference between the acceptors and the filled band is 0.3 electr…
Abstract Various quantitative scattering relationships for polymers have been examined experimentally in order to test their validity as assumptions in the x‐ray determination of crystallinity. These are ( a ) the proportionality between the scattered intensity and the pt value of the specimen ( p is the density and t…
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