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Particle coarsening kinetics during thermal decompositions: CdO from CdCO3

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Abstract

In situ synchrotron X-ray diffraction determination of product particle size during the thermal decomposition of CdCO3 powders is evaluated for sintering kinetics. The rate-determining step for particle growth is not the same during the reaction as after, the data suggesting surface diffusion during decomposition but evaporation-condensation after. Reasons for the difference are discussed, including the parent-phase matrix and CO2 from the decomposition. When compared with loss of crystal imperfections, four stages of growth are seen, each affecting the reactivity of the product.

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Authors and Affiliations

  1. Department of Chemistry, Arizona State University, 85287-1604, Tempe, Arizona, USA

    J. R. Schoonover & S. H. Lin

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  1. J. R. Schoonover
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  2. S. H. Lin
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Schoonover, J.R., Lin, S.H. Particle coarsening kinetics during thermal decompositions: CdO from CdCO3 . J Mater Sci 25, 4518–4524 (1990). https://doi.org/10.1007/BF00581117

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  • DOI: https://doi.org/10.1007/BF00581117

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