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STUDY OF GLASS BATCH MELTING BY RADIOACTIVE TRACING *
Author(s) -
Lindroth Stig
Publication year - 1949
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1949.tb19768.x
Subject(s) - diffusion , liquid nitrogen , analytical chemistry (journal) , chemistry , radiochemistry , thorium , materials science , mineralogy , thermodynamics , chromatography , metallurgy , uranium , physics , organic chemistry
A bstract Radioactive emanation‐producing tracers for the investigation of powders have been applied to (1) the determination of surfaces and surface changes (e.g., melting) and (2) the study of diffusion phenomena in relation to transformations and chemical reactions. Preliminary investigations of glass batches have indicated the usefulness of this method. In the application of the procedure, small samples of glass batch (0.2 gm.) are treated with radiothorium nitrate solution, dried and sieved, and heated at a constant rate of 10 °C. per minute to 900–1000°. The release of thorium emanation atoms as a function of the temperature is measured by their ionizing effect on a nitrogen current passing the sample into an ionization chamber connected to an amplifier and a sensitive galvanometer. Investigations using this method are described.