Metastable precipitation kinetics in NaCl:Pb 2+ crystals at room temperature

The RT precipitation kinetics have been studied for the metastable phase in NaCl:Pb 2+ crystals by precise density measurements. The results obtained seem to be unaccountable in terms of the diffusion-controlled growth of constant or increasing number of particles. The observed process is concluded...

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Published inThe Journal of physics and chemistry of solids Vol. 42; no. 6; pp. 551 - 553
Main Authors Andreev, G.A., Hartmanová, M., Klimov, V.A.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 1981
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Summary:The RT precipitation kinetics have been studied for the metastable phase in NaCl:Pb 2+ crystals by precise density measurements. The results obtained seem to be unaccountable in terms of the diffusion-controlled growth of constant or increasing number of particles. The observed process is concluded to be a coalescence (Ostwald ripening). At the late stage the experimental data fit the t − 1 3 law for solute depletion predicted by the asymptotic coalescence theory of Lifshitz and Slezov. A diffusion coefficient of Pb 2+ in the NaCl lattice and the particle size have been estimated by using the theory.
ISSN:0022-3697
1879-2553
DOI:10.1016/0022-3697(81)90039-1