Sodium transport in the Na/sub 2/O-H/sub 2/O-SiO/sub 2/ glass system

Journal Article · Fri Mar 01 04:00:00 EST 1985 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1985.tb09658.x· OSTI ID:5031982

Molinelli, J; Takata, M; Tomozawa, M

The variation with water content of dc conductivity and Na diffusion coefficient for the Na/sub 2/O x 4SiO/sub 2/ and Na/sub 2/O x 2SiO/sub 2/ glass systems was found to be similar to that of the Na/sub 2/O x 3SiO/sub 2/ series reported earlier. The conductivity was estimated for the ternary system Na/sub 2/O-H/sub 2/O-SiO/sub 2/ by combining the present results with the previous data on the Na/sub 2/O X 3SiO/sub 2/ system. When the conductivity of those glasses with a constant (Na/sub 2/O) + (H/sub 2/O) content was plotted against water content, a pronounced mixed ''alkali'' effect was demonstrated. The Haven ratio, calculated by comparison of the dc conductivity to the Na diffusion coefficient at 100/sup 0/C for each of the three glass systems, was found to increase toward unity with increasing water content. This suggests that the addition of water reduces the number of sodium charge carriers. The subsequent increase in conductivity beyond the minimum with the introduction of larger amounts of water is, probably, due to an increase in the mobility of the Na+ ions.

• Research Organization: Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, New York
• OSTI ID: 5031982
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 68:3; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALI METAL COMPOUNDS
ALKALI METALS
ATOM TRANSPORT
CARRIER MOBILITY
CHALCOGENIDES
CHARGE CARRIERS
CURRENTS
DIFFUSION
DIRECT CURRENT
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
GLASS
HYDROGEN COMPOUNDS
MEDIUM TEMPERATURE
METALS
MOBILITY
MOISTURE
NEUTRAL-PARTICLE TRANSPORT
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATION TRANSPORT
SILICON COMPOUNDS
SILICON OXIDES
SODIUM
SODIUM COMPOUNDS
SODIUM OXIDES
WATER