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Influence of the temperature and duration of the annealing on the lattice structure and growth of the Mg-Al spinel layer

  • Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, MgO film is successfully grown on polycrystalline and monocrystalline alumina substrates using sol-gel method, and polycrystalline and monocrystalline Mg-Al spinels are fabricated by solid state reaction, respectively. The influence of annealing temperature and time on the lattice structure and growth of the formed Mg-Al spinel layer has been investigated. It is indicated that the annealing temperature and time on the as-synthesized polycrystalline Mg-Al spinel has more significant influence than that of single crystal Mg-Al spinel. The thickness of the Mg-Al spinel layer increases with the annealing temperature, both for polycrystalline and for monocrystalline alumina substrates. And the significantly intercrystalline diffusion of Mg 2+ ions and Al 3+ ions results in a quicker growth velocity of the Mg-Al spinel layer than that of intracrystalline diffusion.

Original languageEnglish
Pages (from-to)5012-5016
Number of pages5
JournalApplied Surface Science
Volume257
Issue number11
DOIs
StatePublished - 15 Mar 2011

Keywords

  • Alumina
  • Diffusion
  • Mg-Al spinel
  • Solid state reaction

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