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Ageing of wet-synthesized oxide powders

Role of surface carbonation, effect on sintering, restoration

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Abstract

Wet chemical synthesis of precursor oxide ceramics is a method to obtain small particulate powders. Such powders are far more prone to ageing in air than more traditional precursors. Thermogravimetric analysis is used to highlight the species responsible for the ageing of ceramic precursors. Indeed water and carbon dioxide are observed to evolve from aged powders. Ceramics obtained from aged precursors can reach a very low final density with respect to the theoretical value. A large degree of the original sintering properties can be recovered after washing the aged powders with ethanol in a basic medium.

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Authors and Affiliations

  1. Department Materials Science and Chemical Engineering, Politecnico di Torino, INSTM Research Unit POLITO-LINCE, Corso Duca degli Abruzzi 24, 10129, Torino, Italy

    Laura Montanaro, F. Merlo & Paola Palmero

  2. Laboratoire MADIREL, UMR CNRS 6121, Université de Provence, Centre St. Jérôme, Av. Escadrille Normandie Niemen, 13397, Marseille cedex 20, France

    K. Belgacem, P. Llewellyn & F. Rouquerol

Authors
  1. Laura Montanaro
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  2. K. Belgacem
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  3. P. Llewellyn
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  4. F. Rouquerol
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  5. F. Merlo
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  6. Paola Palmero
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Correspondence to P. Llewellyn.

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Montanaro, L., Belgacem, K., Llewellyn, P. et al. Ageing of wet-synthesized oxide powders. J Therm Anal Calorim 88, 789–793 (2007). https://doi.org/10.1007/s10973-006-8066-4

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  • DOI: https://doi.org/10.1007/s10973-006-8066-4

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