Aggregation and migration of ion-implanted silver in lithia-alumina-silica glass

Journal Article · Fri Apr 01 00:00:00 EST 1977 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.323867· OSTI ID:7224719

Arnold, G W; Borders, J A

The near-surface nucleation and crystallization behavior of Ag/sup +/ ion-implanted lithia-alumina-silica glasses has been studied. For room-temperature Ag implants, crystallization of the glass ceramic phase was prevented by dissolution of Ag precipitates and migration of Ag atoms at temperatures below that necessary for formation of the glass ceramic phase. Crystallization was demonstrated after low-temperature or low-dose-rate implantations. Optical spectroscopy was used to monitor the size of colloidal Ag particles and to detect the presence of the crystalline phase. Rutherford backscattering spectroscopy (RBS) was used to obtain the depth distribution of Ag atoms in the glass and thus monitor Ag migration. For samples implanted at room temperature and at relatively high dose rates (approx.1 ..mu..A/cm/sup 2/), aggregation of the Ag atoms into colloids occurred during implantation and also during subsequent annealing to temperatures < or =350 degreeC. The RBS spectra indicate some migration of the Ag to the surface at these temperatures. For annealing temperatures >350 degreeC, both optical and RBS measurements show that Ag is lost from the glass surface. The initial spatial distribution of the Ag for these high-dose-rate room-temperature implantations was distorted by interactions with the associated damage and possibly by local electric fields caused by neutralization of the implanted ions. It was possible to obtain dispersed Ag nuclei by implanting at low sample temperatures (80 K) or at low beam current (approx.200 nA/cm/sup 2/) to reduce ion-beam heating. Although some migration to the surface was seen in these samples, it occurred at higher temperatures and crystalline precipitation was achieved by annealing at 500 degreeC.

• Research Organization: Sandia Laboratories, Albuquerque, New Mexico 87115
• OSTI ID: 7224719
• Journal Information: J. Appl. Phys.; (United States), Vol. 48:4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
GLASS
PHYSICAL RADIATION EFFECTS
ABSORPTION SPECTRA
AGGLOMERATION
ALUMINIUM SILICATES
ANNEALING
BACKSCATTERING
CERAMICS
COLLOIDS
CRYSTALLIZATION
DEPTH DOSE DISTRIBUTIONS
DISPERSION HARDENING
DOSE-RESPONSE RELATIONSHIPS
ION IMPLANTATION
KEV RANGE 100-1000
LITHIUM SILICATES
MIGRATION LENGTH
NUCLEATION
PRECIPITATION
RUTHERFORD SCATTERING
SILVER IONS
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ATOMIC IONS
CHARGED PARTICLES
DISPERSIONS
ELASTIC SCATTERING
ENERGY RANGE
HARDENING
HEAT TREATMENTS
IONS
KEV RANGE
LITHIUM COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RADIATION DOSE DISTRIBUTIONS
RADIATION EFFECTS
SCATTERING
SEPARATION PROCESSES
SILICATES
SILICON COMPOUNDS
SPATIAL DOSE DISTRIBUTIONS
SPECTRA
360605* - Materials- Radiation Effects