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- W2023894911 abstract "The investigation into the electrical condition of hot surfaces has consisted mainly of measurements of ( a ) the steady equilibrium potentials acquired by such surfaces when heated in a vacuum or in contact with various gases, and ( b ) the rates at which these potentials build up after earthing. The previous communications of this series have dealt with the steady potentials exhibited by gold, silver, nickel, platinum, carbon, and copper surfaces under varying conditions. During the course of these experiments the rates of attainment of the steady potentials were also observed and recorded, and are described below. The results with the silver sheet, however, have been omitted for reasons which have already been given. Certain general regularities in the results have been distinguished, whereby much light is thrown on the nature and mechanism of the processes taking place at the interface between solid and gas phases. It has now been found possible to advance a more complete explanation of the changes occurring on the surfaces and which give rise to their electrical charging up as observed in these researches. It also gives information, which is of fundamental importance, on the subject of the role played by hot surfaces in heterogeneous catalytic reactions. Experimental . The apparatus employed has been described for the most part in sufficient detail in the earlier communications. The addition of a number of multivane variable air condensers, each of 0·001 microfarad capacity in parallel to the surface-electrometer-earth system made it possible to vary the capacity of any surface to earth within suitable limits. The condensers, connecting leads, and switches were completely enclosed in an earthed metallic shielding as a protection against spurious electrical effects from external sources. The condensers were calibrated against a Dubilier standard condenser, while the capacities of the surface-electrometer systems were determined by the method of mixtures, one of the variable air condensers serving as a sub-standard." @default.
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- W2023894911 date "1934-03-29" @default.
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- W2023894911 title "The electrical condition of hot surfaces during the adsorption of gases. Part V.—The charging up of hot surfaces" @default.
- W2023894911 doi "https://doi.org/10.1098/rspa.1934.0051" @default.
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