The thermal decomposition of pure and doped cadmium carbonate: II. Surface and pore structure studies

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Abstract
Specific surface areas and pore structure studies were carried out on pure and doped cadmium carbonate heated at different temperatures. Doping with a different valency cation than the host ion was found to influence appreciably both the extent and location of the surface. Results could be interpreted in terms of anion vacancy mechanism, in which these vacancies could be created in the case of Li+ doping and could be annealed in the case of Al3+ doping, thus affecting “material” transport which in turn is reflected in changes in the extent and location of the surface. In this respect Al3+ ions might act as “inhibitors” for material transport and thus lead to a “stabilised” pore structure. The results implicitly suggest that “material” transport is more significant in affecting the pore structure than changes in the rates of isothermal decomposition.

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