Influence of Grain Boundary Silica Impurity on Alumina Toughness

  • J. S. Moya
  • W. M. Kriven
  • J. A. Pask
Part of the Materials Science Research book series (MSR, volume 14)


In a series of previous reports the effect of silica impurity on aggregation state and on electrophoretic, pressing, filtering and sintering behavior on alumina powders has been studied. The results obtained showed that the silica surface impurity plays an important role in the ceramic processing of powders by (a) decreasing pH values of the isoelectric point (i. e. p.), which affects the aggregation state of the powder, and (b) decreasing the compactability and the activation energy for the initial stage of sintering.


Stress Intensity Factor Aggregation State Alumina Powder Boundary Groove Untreated Alumina 
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Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • J. S. Moya
    • 1
  • W. M. Kriven
    • 2
  • J. A. Pask
    • 2
  1. 1.Instituto de Ceramica y VidrioMadridSpain
  2. 2.Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral EngineeringUniversity of CaliforniaBerkeleyUSA

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