A study on the synthesis of MgAl2O4 Spinel by starch assisted Sol-Gel process

Abstract

In this paper, the synthesis of ceramic spinel MgAl204 by starch assisted sol - gel process is presented. The gel mixture was prepared by using Mg(N03)2.6H20, A1(N03)3-9H20 as precursors and starch as a gel agent. The study focused on relevant components of gel mixture and the calcinating temperature. The results showed that suitable molar proportion of Mg2+/AI3+; stareh/(Mg2 + Al34) and H20/starch were 0.5, 0.4 and 60, respectively. The calcination at 1100 °C for 60 minutes was suitable for forming phase of spinel. The product was a single phase of spinel MgAl2O4 with excellent crystallinity and uniform size in the range of 300 to 400 nm.