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Kinetic study of the dehydration of lithium sulphate monohydrate

Abstract : The dehydration of lithium sulphate monohydrate has been studied by isothermal thermogravimetry at 80 °C, under various partial pressures in water vapour. The kinetic curves are sigmoid, they are interpreted with a model involving nucleation and growth steps: the nucleation is supposed to occur at the surface of the grains and is followed by a rapid two-dimensional growth, the new phase developing towards the centre of the grains. The studied powder being composed of ellipsoidal particles, this geometry is taken into account in the model.
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Françoise Valdivieso, Vincent Bouineau, Michèle Pijolat, Michel Soustelle. Kinetic study of the dehydration of lithium sulphate monohydrate. Solid State Ionics, Elsevier, 1997, 101-103 (part 2), pp.1299-1303. ⟨10.1016/S0167-2738(97)00238-5⟩. ⟨emse-00610250⟩



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