Effect of additives on the densification of reaction sintered and presynthesised spinels

摘要: Abstract Densification of reaction sintered and presynthesised stoichiometric spinels were studied adding various oxides as additives. Using hydroxides starting materials, presynthesisation spinel was done at 1400 1600 °C. For products the also calcined separately 1600 °C for similar nature reactivity then mixed composition. Oxides namely, B2O3, V2O5, TiO2, Cr2O3 coprecipitated used additives on both types spinels. Pressure-less sintering in temperature range 1550–1650 °C characterised densification study.