Impact of modifier-rich coatings on the ionic transport of glasses [Poster]

Conference · Tue Dec 13 00:00:00 EST 2022

DOI:https://doi.org/10.2172/1903094· OSTI ID:1903094

Nieves, Cesar A. ^[1]; Yuan, Mengxue ^[1]; Ogrinc, Andrew Lawrence ^[1]; Furman, Eugene ^[1]; Clem, Paul ^[2]; Kim, Seong H. ^[1]; Lanagan, Michael T. ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States)
2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Ionic conduction in silicate glasses is mainly influenced by the nature, concentration, and mobility of the network-modifying (NWM) cations. The electrical conduction in SLS is dominated by the ionic migration of sodium moving from the anode to the cathode. An activation energy for this conduction process was calculated to be 0.82eV and in good agreement with values previously reported. The conduction process associated to the leakage current and relaxation peak in TSDC for HPFS is attributed to conduction between nonbridging oxygen hole centers (NBOHC). It is suggested that ≡Si-OH = ≡Si-O^- + H⁰ under thermo-electric poling, promoting hole or proton injection from the anode and responsible for the 1.5eV relaxation peak. No previous TSDC data have been found to corroborate this mechanism. The higher activation energy and lower current intensity for the coated HPFS might be attributed to a lower concentration of NBOHC after heat treatment (Si-OH + OH-Si = SiO-Si + H₂O). This could explain the TSDC signal around room temperature for the coated HPFS. Another possible explanation could be a redox reaction at the anode region dominating the current response.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program
• DOE Contract Number: NA0003525
• OSTI ID: 1903094
• Report Number(s): SAND2021-15717C; 702225
• Resource Relation: Conference: 14.Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 14), Vancouver, BC (Canada), 13-16 Dec 2021; Related Information: https://ceramics.org/event/14th-pacific-rim-conference-on-ceramic-and-glass-technology-pacrim-14-including-glass-optical-materials-division-2021-annual-meeting-gomd-2021-archive
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE