The Composition, Structure, and Helium Permeability of Glass-Crystalline Shells of Cenospheres

摘要

The results of studying the relationship of the composition, structure, and the diffusive properties of glass-crystalline shells of cenospheres relative to helium are presented in a wide range of variations of macrocomponent and phase compositions, wt %: 58-68 of SiO2, 21-37 of Al2O3, 30-93 of glass phase, 1-50 of mullite, 0-15 of cristobalite, 1-7 of quartz, and 0-2 of anorthite. It is found that the helium permeability coefficients of the cenosphere glass phase exceed the similar values of silicate glass. The high level of permeability of cenosphere glass-crystalline shells ensures significant potential for their application as membrane elements of the diffusion-sorption technology of the selective recovery of helium from gas mixtures.