The Structure Connectivity Factor
as Applied to the Determination
of the Hydrogen Permeability Coefficient of Glasses

E. F. Medvedev

All-Russia Research Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center,
Sarov, Nizhegorodskaya oblast, 607190 Russia

e-mail: medvedev@otd13.vniief.ru

Received March 16, 2005

Abstract—Glass microspheres have been used in laser physics as hydrogen microcontainers over a period of
more than fifty years. However, developers of glass compositions are guided in their work only by practical
experience and intuition in view of the lack of reliable data on the influence of glass components on the hydro-
gen permeability. There is only one expression that approximately describes the dependence of the permeability
on the composition, i.e., the SiO₂, B₂O₃, and P₂O₅ contents. It is advisable to complement the computational
equation by the Ermolenko structure connectivity factor in order to include all glass components and the net-
work dimensionality in the calculations.

DOI: 10.1134/S1087659606050105

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