Fabrication of Transparent AlON Ceramics by Solid-state Reaction Sintering

doi:10.3724/SP.J.1077.2011.00499

Abstract

Abstract: Transparent AlON ceramic which exhibit excellent optical and mechanical properties is a potential alternative to sapphire for the application of IR windows and armor. In this work, transparent AlON ceramics were successfully prepared by solid-state reaction sintering. The effects of sintering aids and holding time on densification of AlON ceramics were investigated. The phase composition and microstructure of the ceramics were characterized by XRD and SEM, respectively. In-line transmittance of the ceramics was measured by spectrophotometer. The results show that co-doping of MgO and Y₂O₃ as sintering aid is more effective to enhance densification of AlON ceramics than the doping of MgO or Y₂O₃. With doping level of 0.08wt%Y₂O₃, the transmission of ceramics increases with the increase of MgO content. Co-doped with 0.08 wt% Y₂O₃and 1wt% MgO, the ceramics (1mm thick) sintered at 1950℃ for 12h in N2 atmosphere have an in-line transmission of 60% (at 600nm).

Key words: solid-state reaction sintering, AlON, MgO, Y₂O₃

CLC Number:

TQ174

YUAN Xian-Yang, ZHANG Fang, LIU Xue-Jian, ZHANG-Zhao, WANG Shi-Wei. Fabrication of Transparent AlON Ceramics by Solid-state Reaction Sintering[J]. Journal of Inorganic Materials, 2011, 26(5): 499-502.

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