The co precipitated spinel forming precursor MAH and high purity α-Al2O3 have been used to prepare alumina-spinel admixtures accompanied by attrition milling to ascertain the spinel-alumina interactions at high temperatures. Pellets sintered at different temperatures have been characterized with regard to B.D., %A.P., %ρth, %closed pores, etc. Microstructural study has been conducted by SEM. Positive effect of MAH addition ranges from 0.355 to 1.0 wt% spinel in alumina, and > 99% ρth could be attained at 1650°C, 2h. Solid solution interaction of submicron to nano size spinel-alumina powders occurs during sintering and some α-Al2O3 get accommodated in the spinel as solid solution.