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Article Dans Une Revue Ceramics International Année : 2012

Fine-grained transparent MgAl2O4 spinel obtained by spark plasma sintering of commercially available nanopowders

S. Trombert
  • Fonction : Auteur
L. Bonneau

Résumé

A high transmittance/small grain size combination for pure spinel ceramics from commercially available nanopowders without sintering aids can be obtained by SPS sintering. By using a low heating rate ≤10 °C/min and a sintering temperature ≤1300 °C, a transparent polycrystalline MgAl 2O4 spinel was fabricated by SPS with an in-line transmission of 74% and 84% for 550 nm (visible) and 2000 nm (NIR) wavelengths respectively. A small average grain size of about 250 nm was obtained and the pores located at the multiple grain junctions have a mean size of about 20 nm. The high in-line transmission is linked not only to the low residual porosity but particularly to the very small size of pores. © 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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Dates et versions

hal-01834904 , version 1 (11-07-2018)

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Citer

G. Bonnefont, Gilbert Fantozzi, S. Trombert, L. Bonneau. Fine-grained transparent MgAl2O4 spinel obtained by spark plasma sintering of commercially available nanopowders. Ceramics International, 2012, 38 (1), pp.131-140. ⟨10.1016/j.ceramint.2011.06.045⟩. ⟨hal-01834904⟩
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