Intrinsic and radiation-induced defects in silica and germania glasses

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6367350

Dutta, B

Thermally stimulated polarization and depolarization current (TSPC/TSDC) measurements were conducted on GeO/sub 2/ and SiO/sub 2/ glasses to investigate their defect properties and mechanisms of charge transport. The TSPC data of these glasses were found to be their D.C. conductivity. One TSDC peak was observed in GeO/sub 2/ and SiO/sub 2/ (Spectrosil) glasses. Spectrosil-WF (silica glass specially treated to reduce its water content) exhibited two TSDC peaks. The only TSDC peak in GeO/sub 2/ and Spectrosil glasses and the low-temperature TSDC peak in Spectrosil-WF are ascribed to the orientation polarization of intrinsic defects labeled as Intimate Valence Alternation Pairs (IVAP's). The origin of the high-temperature TSDC peak in Spectrosil-WF is uncertain. TSPC/TSDC measurements were also conducted on lead silicate glasses with and without halogen ions to investigate the role of halogen ions in the charge-transport processes. Transport in the binary glasses attributed to the lead ions. Two TSDC peaks have been observed in the binary lead silicate glasses. The low-temperature TSDC peak in these glasses in ascribed to short-range movement of lead ions and the high-temperature peak is attributed to space-charge polarization due to lead-ion motion.

• Research Organization: Vanderbilt Univ., Nashville, TN (USA)
• OSTI ID: 6367350
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
GERMANIUM OXIDES
GLASS
PHYSICAL RADIATION EFFECTS
LEAD SILICATES
SILICON OXIDES
CHARGE TRANSPORT
DEFECTS
CHALCOGENIDES
GERMANIUM COMPOUNDS
LEAD COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATION EFFECTS
SILICATES
SILICON COMPOUNDS
360206* - Ceramics
Cermets
& Refractories- Radiation Effects