Alkali Ion Conductivity in Fused Silica

Using 22Na as a radiotracer, mobilities of sodium ions in various types of SiO2 glasses were measured and found to depend on the OH content in the silica network. Increasing OH content in SiO2 considerably reduces the Na mobility. The effect of immobilization of Na is discussed in terms of an interaction between hydrogen and sodium ions, similar to the “mixed‐alkali effect” in alkali silicate glasses. High OH‐containing SiO2, structures display the lowest diffusivities of either sodium or hydrogen ions, thus indicating properties which are preferential in practice, such as decreasing ionic instabilities in metal‐oxide‐semiconductor devices.

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Effect of Heat Treatment on the Na⁺ Resistivity of Vitreous Silica

Papadopoulos

Mattox

Meek

1983

Journal of the American Ceramic Society

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The dc resistivity of fused quartz with respect to Na' ions was measured at temperatures up to 750"C, using @-alumina as the sodium source. Heat treatment in air at 1100°C gave minima in resistivity at times which depended on the choice of either a high-OH or a low-OH glass. The initial fall in resistivity is explained by the stabilization of the glass to a more open structure and the later increase is attributed to a blocking effect of "permanent" hydroxyl groups, which slowly enter the glass as atmospheric water.

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Alkali Ion Conductivity in Fused Silica

Cited by 3 publications

References 5 publications

14 MeV neutron irradiation effects in macor glass-ceramic

14 MeV neutron irradiation effects in macor glass-ceramic

Mobility of Sodium Ions in Silica Glass of Different OH Content

Effect of Heat Treatment on the Na⁺ Resistivity of Vitreous Silica

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Alkali Ion Conductivity in Fused Silica

Cited by 3 publications

References 5 publications

14 MeV neutron irradiation effects in macor glass-ceramic

14 MeV neutron irradiation effects in macor glass-ceramic

Mobility of Sodium Ions in Silica Glass of Different OH Content

Effect of Heat Treatment on the Na+ Resistivity of Vitreous Silica

Contact Info

Product

Resources

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Effect of Heat Treatment on the Na⁺ Resistivity of Vitreous Silica