Effect of attritor milling on the densification of magnesium aluminate spinel

Magnesium aluminate (MgAl2O4) spinel produced via self-heat-sustained (SHS) technique

“…The XRD patterns remained identical in samples sintered at temperatures higher than 1500°C and hence are not repeated here. Sarkar et al [9,10] have reported that 100% spinel phase was obtained from Al 2 O 3 -rich composition sintered at 1650°C.…”

“…A number of techniques such as, conventional solid-state-reaction (SSR), sol-gel, spray drying (atomization) and organic gel-assisted citrate complexation, have been extensively employed [1][2][3][4][5][6][7][8][9][10][11][12][13]. The conventional SSR method is the most utilized one in spinel preparation.…”

Sintering behavior, microstructure and mechanical properties of vacuum sintered SiC/spinel nanocomposite

“…The formation of spinel is accompanied with 5-8% volume expansion and therefore it is too difficult to produce dense spinel bodies through one step sintering [11,12]. Furthermore, the brittleness of spinel, which translates to easier microcracking, is another limiting factor in utilizing this material in industry [9,10].…”

Sintering, mechanical and refractory properties of MA spinel prepared via co-precipitation and sol–gel techniques

“…Other much research work was also intensive in the field of improving sintering of MA through various additives [68][69][70][71][72][73][74][75]. The present work aims at improving the sintering, mechanical and refractory properties of the processed magnesium aluminate (MA), magnesia-spinel (M-MA) and alumina-spinel (A-MA) compositions via co-precipitation and sol-gel techniques through chromia, zirconia and chromia/zirconia additions.…”