Journal of Inorganic Materials

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γ-LiAlO2 Layer on (0001) Sapphire Fabricated by Vapor Transport Equilibration

LI Shu-Zhi, XU Jun, YANG Wei-Qiao, ZHOU Jun, ZHOU Sheng-Ming   

  1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2003-12-10 Revised:2004-02-16 Published:2005-01-20 Online:2005-01-20

Abstract: Using vapor transport equilibration(VTE) technique and post-annealing processing, we succeeded in the fabrication of γ-LiAlO2 layer with a highly-preferred orientation of [100] on (0001) sapphire crystal. X-ray diffraction
indicates that the as-fabricated layer by VTE is a polycrystalline film shown to be a single-phase. When the γ-LiAlO2 layers are annealed at 850~900℃ for about 120 hours in air, the layers become highly textured with [100]
orientation. These results reveal the possibility of fabricating γ-LiAlO2 (100)// sapphires(0001) composite substrate for GaN-based epitaxial film by VTE.

Key words: GaN, vapor transport equilibration(VTE), γ-LiAlO2, sapphire

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