HIGH-TEMPERATURE MEASUREMENTS OF THE RATE OF UPTAKE OF RUBIDIUM OXIDE VAPOR BY SELECTED OXIDES
NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA
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In a program for elucidation of the process of formation of radioactive fallout, the rates were measured at which substrate samples of a clay loam and a calcium ferrite took up vaporized rubidium oxide. It was found that the initial rates of rubidium oxide uptake by both the clay loam and the calcium ferrite were about the same but the calcium ferrite melts reached saturation with respect to rubidium oxide uptake in a few minutes while the clay loam continued to take up the rubidium oxide at a high rate for times of at least an hour. For both substrates, the rate-controlling step for the uptake process was the diffusion of the rubidium oxide vapor through the air to the surfaces of the substrate samples. The uptake of rubidium oxide vapor by a series of simple, unmelted oxides at 1400 deg. C was also measured. In general, the uptake behavior of the rubidium oxide was as expected in that it reacted least with the basic oxides such as SrO and CaO and reacted most with the acidic oxides such as Nb2O5 and SiO2.
- Physical Chemistry
- Radioactivity, Radioactive Wastes and Fission Products