MICROSTRUCTURE CHARACTERISTIC OF ALUMINUM TITANATE SYNTHESIED BY BOTH SOLID- STATE AND SOL-GEL PROCESSES

A comparing study on formation and microstructure features of aluminum titanate is investigated through both solid-state and sol-gel processes. Aluminum titanate formed by firing at ۱۳۵۰ºC and ۱۴۵۰ºC for ۴h in solid-state process. In the sol-gel process formation of submicron sized particles is followed by addition of sucrose into the transparent sol. XRD analysis was confirmed the formation of aluminum titanate at ۱۴۰۰ºC  in lower duration of calcination (۳h) without any additives in the sol-gel process. In this work ۲wt% MgO is added to the samples as the additive for forming acceleration of aluminum titanate. The influence of MgO addition and heat treatment are studied on phase formation and microstructure development of aluminum titanate in both procedures. Additive optimizes aluminum titanate formation at lower temperatures (۱۳۰۰-۱۳۵۰ºC). Phase and microstructure studies of Mg containing samples optimally show significance in aluminum titanate formation.

Keywords:

Aluminum titanate , Solid-state , Sol-gel , MgO , Sucrose