Sol–gel synthesis of aluminum titanate (Al2TiO5) nano-particles

✍ Scribed by M. Sobhani; H.R. Rezaie; R. Naghizadeh

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 630 KB
• Volume: 206
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/j.jmatprotec.2007.12.023

✦ Synopsis

Aluminum titanate (Al 2 TiO 5 ) is a refractory material with low thermal expansion coefficient about 1-2 × 10 -6 K -1 . In this study nano-particles of tialite (Al 2 TiO 5 ) have been synthesized by sol-gel processing at low temperatures around 750 • C. The raw materials were titanium butoxide, aluminum chloride, ethanol and citric acid. After preparing of primary sol at acidic pH and polymerization at 80 • C, drying and calcination of obtained gel have been done at different temperatures. Results of X-ray diffraction (XRD), Fourier transform infra red (FTIR), simultaneous thermal analysis (STA) and scanning electron microscopy (SEM) analyses showed that the formation temperature of tialite reduced from 1280 to 750 • C via sol-gel processing at a homogeneous system in atomic level. Size of the primary particles was less than 100 nm but nano-particles of tialite agglomerated like cabbage shape.