Effect of Annealing Temperature on Prepared Nanoparticles Li-Ferrite Using Positron Annihilation Lifetime Technique

Abstract

Lithium ferrite nanoparticles were synthesized by a sol-gel auto-combustion method. For prepared samples, the nanograins were increased with increasing the annealing temperature. Positron annihilation lifetime spectroscopy (PALS) was used to study defects at different sites for nanograins Li-ferrites. The analysis of the PAL spectrum indicated two lifetime components τ1 and τ2 for the annihilation of the positrons, and their corresponding relative intensities I1% and I2%. For nanoparticles Li-ferrite there are correlations between: 1) I2, τ2, annealing temperature and the total porosity (Pt) with the grain size; 2) I1, μi, Ms and the homogeneity with grain size.

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Samy, A. and Aly, E. (2015) Effect of Annealing Temperature on Prepared Nanoparticles Li-Ferrite Using Positron Annihilation Lifetime Technique. Materials Sciences and Applications, 6, 436-444. doi: 10.4236/msa.2015.65047.

Conflicts of Interest

The authors declare no conflicts of interest.

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