Effect of carbon monoxide on the carbothermal reduction and nitridation reaction of alumina

✍ Scribed by Hyeong Uk Joo; Woo-Sik Jung

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 434 KB
• Volume: 204
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/j.jmatprotec.2008.01.028

✦ Synopsis

The carbothermal reduction and nitridation (CRN) of alumina (Al 2 O 3 ) to aluminum nitride (AlN) were investigated under a flow of mixed gas of nitrogen and carbon monoxide (CO).

The powders obtained by calcining the (hydroxo)(succinato)Al(III) complex under a flow of the mixed gas with different CO contents were characterized by powder XRD and 27 Al magicangle spinning (MAS) NMR spectroscopy. The complex decomposed into -Al 2 O 3 , which was then converted into either AlN or ␦-Al 2 O 3 through ␥-Al 2 O 3 , depending on the CO content in the mixed gas. The CRN reaction of Al 2 O 3 became more retarded with increasing content of CO in the mixed gas.