LAUSR

Abstract This research work accomplishes the mechanochemical effect on synthesis and sintering behavior of MgAl2O4 spinel prepared by separate vibrating ball milling (VBM) and planetary micro-milling (PMM-P7) processes. The pure stoichiometric magnesium aluminate spinel (MgAl2O4) was produced from the precursors [Mg(OH)2 & AlOOH], and their densification at an optimum sintering profile. Non-gelation, soft agglomeration, and compressive stress induced by micro-milling in ethanol solvent facilitated the pure phase at low calcination temperature and confirmed through TEM. Eventually, the formation of nanoscale (25 nm) particles, ~98% densification, and grain size (38 μm) in atmospheric sintering are being achieved through planetary micro-milling. Critical discussion on the effect of planetary micro-milling is emphasized to understand the enhanced densification and optimum grain size that may expedite to development of other oxide particles and dense ceramics.