Mechanical activation assisted synthesis of pure nanocrystalline forsterite powder

Synthesis and characterization of pure nanocrystalline magnesium aluminate spinel powder

“…2 shows the DTA and TG curves of powder after 5 min of milling. As can be seen, the two endothermic bands observed at 290 and 515 • C are attributed to dehydration and magnesite decomposition, respectively [3]. At 1040 • C, a small exothermic effect was detected associated with the nucleation and formation of spinel by reaction between alumina and periclase (MgO), as reported by Sainz et al [31].…”

“…Nanocrystalline materials with an average crystalline size of a few nanometers have been of much interest to many investigators [1][2][3]. Nanomaterials exhibit increased strength/hardness, enhanced diffusivity, improved ductility/toughness, reduced density, reduced elastic modulus, increased specific heat, etc.…”

Synthesis and characterization of spinel–forsterite nanocomposites

“…As we showed in our previous studies [16][17][18], nanostructure forsterite and spinel powders can be obtained after 40 h of mechanical activation with subsequent annealing at 1200 8C for 1 h. The aim of the present work was to synthesize pure spinel-forsterite nanocomposites from the mixture of talc, magnesium carbonate, and alumina powders simultaneously. Hence, initial powders were milled for 40 h and then annealed at 1000 and 1200 8C for 1 h. Fig.…”

Crystallisation and microstructure of nepheline–forsterite glass-ceramics

“…Forsterite has been synthesised by various techniques, including the conventional solid-state reaction of periclase (MgO) and silica (SiO 2 ) [12], the mechanical activation of a talc and magnesium carbonate powder mixture [13], the polymer precursor method [14] and the sol-gel method [15]. However, the sintering temperature of forsterite is approximately 1500ºC, which is too high and limits its use.…”