Journal of Thermal Analysis and Calorimetry

, Volume 88, Issue 3, pp 789–793 | Cite as

Ageing of wet-synthesized oxide powders

Role of surface carbonation, effect on sintering, restoration
  • Laura Montanaro
  • K. Belgacem
  • P. Llewellyn
  • F. Rouquerol
  • F. Merlo
  • Paola Palmero
Article

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.

Keywords

ageing alumina-YAG composites ceramic precursors high-res thermal analysis 

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Copyright information

© Springer Science+Business Media, LLC. 2007

Authors and Affiliations

  • Laura Montanaro
    • 1
  • K. Belgacem
    • 2
  • P. Llewellyn
    • 2
  • F. Rouquerol
    • 2
  • F. Merlo
    • 1
  • Paola Palmero
    • 1
  1. 1.Department Materials Science and Chemical Engineering, Politecnico di TorinoINSTM Research Unit POLITO-LINCETorinoItaly
  2. 2.Laboratoire MADIREL, UMR CNRS 6121Université de ProvenceMarseille cedex 20France

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