The sintering behaviour of two differently produced Al2O3 powders is studied by positron annihilation. The positron lifetime in the perfect lattice is found to be τc = (149 ± 2) ps, whereas for dislocations τd = (166 ± 5) ps and for structural vacancies (γ‐Al2O3), τv = (223 ± 8) ps.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics