Synthesis of Ultrafine MgAl₂O₄ Powders by Nitrate-Citrate Sol-Gel Combustion Process

Abstract:

Ultrafine MgAl2O4 powders were synthesized by a nitrate-citrate sol-gel combustion process using Al(NO3)3·9H2O, Mg(NO3)2·6H2O and C6H8O7·H2O as initial materials. The result of X-ray diffraction (XRD) analysis indicated that single-phase MgAl2O4 powder could be obtained at 850 oC, which is much lower than that needed in solid-state reactions. Transmission electron microscopy image showed that the as-prepared powder was in the nano scale and little agglomerate exited. It is concluded that this process need shorter time, lower temperature, and simple equipments.

• Periodical: Key Engineering Materials (Volumes 368-372)
• Pages: 407-408
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.368-372.407
• Online since: February 2008
• Authors: Long Chen, Qi Zhang, Wen Ping Chen, Yao Gang Li, Yan Mo Chen, Mei Fang Zhu
• Keywords: Combustion Synthesis (CS), MgAl₂O₄, Sol-Gel (SG), Ultra-Fine Powder

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