Analytical electron microscopic studies and positron lifetime measurements in Al-doped MgO crystals
- 15 July 1987
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 62 (2) , 429-433
- https://doi.org/10.1063/1.339816
Abstract
MgO crystals intentionally doped with Al were characterized by analytical electron microscopic examinations and positron lifetime measurements. Large spinel (MgO Al2O3) precipitates were observed in samples with high contents of Al. A well-defined crystallographic relationship between the precipitates and the matrix was found. The characteristics of positron lifetime spectra appear to depend on the valence state of the different impurities in the MgO lattice suggesting that positrons are trapped by vacancy impurity complexes.This publication has 25 references indexed in Scilit:
- Light scattering measurements of diffusional growth of precipitates in nickel- and cobalt-doped MgOJournal of Applied Physics, 1985
- Physical properties of oxides containing metal precipitatesPhilosophical Magazine A, 1984
- Characterization of metal precipitates in magnesium oxidePhilosophical Magazine A, 1984
- Electrolytic coloration and electrical breakdown of MgO single crystalsJournal of Solid State Chemistry, 1984
- Nickel Colloids in Reduced Nickel-Doped Magnesium OxidePhysical Review Letters, 1981
- Characterization of defects in nickel-doped MgO crystalsJournal of Applied Physics, 1980
- Metal colloids in ionic crystalsAdvances in Physics, 1979
- Transmission electron microscope studies on Li-doped MgOPhilosophical Magazine A, 1978
- The distribution of iron impurity in single-crystal magnesium oxide and some effects on mechanical propertiesJournal of Materials Science, 1967
- Solid Solution and Precipitation Hardening in Mg-Fe-O AlloysJournal of Applied Physics, 1964