Microwave-assisted synthesis of nanosized α-Al2O3

✍ Scribed by T. Ebadzadeh; K. Asadian

• Book ID: 104089011
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 484 KB
• Volume: 192
• Category: Article
• ISSN: 0032-5910
• DOI: 10.1016/j.powtec.2009.01.001

✦ Synopsis

Nanosized alumina powder was prepared from a mixture of aluminium nitrate and carbon black through microwave heating (2.45 GHz and 900 W) for different times. The products were characterized by powder Xray diffraction. The results showed that γ-Al 2 O 3 was the main phase for powder samples heated for 4 and 6 min. When heating was extended to 8 min, weak peaks of α-Al 2 O 3 also appeared. For heating times longer than 10 min, α-Al 2 O 3 was the only crystalline phase present. The resultant particles were observed by SEM and TEM methods. The average particle size was found to be 96 nm. The surface area of powder was 48 m 2 /g after 15 min heating.