Radiation-induced defect centers in glass ceramics

Journal Article · Sun Jan 15 00:00:00 EST 1989 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.343132· OSTI ID:6614846

Tsai, T E; Friebele, E J; Griscom, D L; Pannhorst, W

Electron spin resonance (ESR) was used to characterize the radiation-induced defect centers in low-thermal-expansion glass ceramics, including two types of Zerodur and Astrositall. The observed ESR spectra can be associated with different types of defect centers: a Zn/sup +/ center, several types of oxygen hole centers (OHCs), an aluminum-oxygen hole center (Al-OHC), an Fe/sup 3 +/ center, Ti/sup 3 +/ and Zr/sup 3 +/ centers, and three types of As centers. An Sb/sup 4 +/ center, which is not observed in Zerodur, is tentatively identified in Astrositall. From the effect of crystallization on the observed defect concentrations in Zerodur and computer simulation of the spectral lines of some of the centers, we infer that among the nine defect centers observed in the Zerodurs, the As-associated centers are located in the glassy phase and/or at the interface between the glassy and crystalline phases, Zn/sup +/ and Al-OHC are in the crystalline phase, and the rest (including most of the OHCs) are in the glassy phase. Radiation-induced compaction in these materials appears to be related to the generation of OHCs in the glass phase.

• Research Organization: Naval Research Laboratory, Washington, DC 20375
• OSTI ID: 6614846
• Journal Information: J. Appl. Phys.; (United States), Vol. 65:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
PHYSICAL RADIATION EFFECTS
GLASS
AMORPHOUS STATE
COMPUTERIZED SIMULATION
CRYSTAL DEFECTS
CRYSTALLIZATION
ELECTRON BEAMS
ELECTRON SPIN RESONANCE
INTERFACES
TITANIUM IONS
ZINC IONS
BEAMS
CHARGED PARTICLES
CRYSTAL STRUCTURE
IONS
LEPTON BEAMS
MAGNETIC RESONANCE
PARTICLE BEAMS
PHASE TRANSFORMATIONS
RADIATION EFFECTS
RESONANCE
SIMULATION
360605* - Materials- Radiation Effects