Simultaneous application of colloidal processing and liquidforming additives to alumina resulted in a sintered density of >99% in 1 h at a temperature as low as 1070°C for a commercial high-purity alumina powder at a total dopant level of 2 mol%. The additives were 0.9% CuO + 0.9% TiOz + 0.1% B 2 0 3 + 0.1% MgO. At higher temperatures or after prolonged sintering, the doped alumina ceramic deve...

A comparison has been made of the infrared spectra of alumina with molybdenum oxide alumina in both the oxidized and reduced forms. In the case of molybdena-alumina prepared via adsorption of gaseous MoOp(OH)t, the spectra show that a practically complete monolayer of Mo6+ oxide covers the alumina. After reduction with hydrogen the hydroxyls of the carrier appear. From the reversibility of redu...

Zr1-xSnxO2 reinforced alumina-mullite refractory was manufactured by slip cast methods using SnO2 as a sintering agent. had considerable influence in the enhanced reaction kinetics of zircon dissociation and subsequent alumina zircon. Presence pro-eutectic transient Al2O3-SnO2 liquid SnO2-SiO2-ZrO2 amorphous phases, densification mullitisation through phase and, mitigated volatilisation (Zr1-xS...

In this paper, behaviour of Al2O3 in aluminium matrix composites is reviewed for its properties and applications. addition, many metal composite fabrication processes are also elaborated. the present days high demand because superior properties. Its still on rise widespread use automotive industries, aerospace industries marine industries. The method matrix-based a deciding factor resultant Des...