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Journal of Materials Science

, Volume 32, Issue 24, pp 6525–6531 | Cite as

Synthesis, sintering and expansion of Al0.8Mg0.6Ti1.6O5: a low-thermal-expansion material resistant to thermal decomposition

  • V. Buscaglia
  • F. Caracciolo
  • M. Leoni
  • P. Nanni
  • M. Viviani
  • J. Lemaitre
Article

Abstract

A low-thermal-expansion ceramic with the composition Al0.8Mg0.6Ti1.6O5 that is isostructural to aluminium titanate Al2TiO5, was prepared by solid-state reaction of a mixture of α-Al2O3, MgO and TiO2-rutile. The synthesized material does not decompose after annealing for 250 h in the temperature range of 900–1175°C. The ceramic sintered at 1350°C has a 97% relative density, a grain size of ≈5 μm and an average thermal expansion coefficient between 80 and 1000°C of ≈2×10−6 K−1. Materials with the same composition, but obtained by reaction sintering, have a higher thermal expansion coefficient (4×10−6 K−1) and showed the presence of secondary phases.

Keywords

Thermal Expansion Rutile Reaction Sinter M613 Sample High Thermal Expansion 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • V. Buscaglia
    • 1
  • F. Caracciolo
    • 2
  • M. Leoni
    • 3
  • P. Nanni
  • M. Viviani
  • J. Lemaitre
  1. 1.Consiglio Nazionale delle RicercheIstituto di Chimica Fisica Applicata dei MaterialiGenoaItaly
  2. 2.Facolta di IngegneriaIstituto di ChimicaGenoaItaly
  3. 3.Laboratoire de Technologie des Poudres, MX-EcublensEcole Polytechnique Federale de Lausanne (EPFL)LausanneSwitzerland

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