"The extensive investigations in the past have conclusively established that the alkali ions are responsible for the electrical conductivity of glass in both the brittle and viscous states; however, with the exception of one investigation in the brittle state, little consideration has been given to determination of the mobility of the alkali ion in such glassy systems. A review of the literature pertaining to the electrical conductivity of glass is presented.
A method, based on the rate of development of the ionic space charge responsible for polarization of conductivity cell employing direct current voltages, is proposed as a means for measuring the relative ionic mobility in the fused state. Similar studies in the field of liquid dielectrics are reviewed. Measurements of the relative mobility of lithium, sodium and potassium in boron trioxide glass were made and the data presented. It is Indicated that ionic mobility and temperature are related as a simple exponential in the form, m = a’e-b/T, and mobility and ionic size are similarly related in the form, m = a”e-b’R.
The conductivity and viscosity data for sodium-boron trioxide glass, as reported by previous investigators, are reviewed and compared with these findings. It is indicated that good agreement is possible if the increase in conductivity attributable to the sodium ion is considered rather than the gross conductivity of the glass. The conductivity attributable to the sodium ion is considered to be the difference between that of the sodium bearing glass and that of pure boron trioxide"--Abstract, page vii.
Herold, P. G.
Materials Science and Engineering
Ph. D. in Ceramic Engineering
Missouri School of Mines and Metallurgy
vii, 75 pages
© 1950 Theodore J. M. Planje, All rights reserved.
Dissertation - Open Access
Glass -- Research
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Planje, Theodore J., "A study of relative ionic mobility of alkali ions in dilute alkali-boron trioxide glasses as deduced from space charge considerations" (1950). Doctoral Dissertations. 514.