Abstract
In this paper, the phase, structure and sinterability of magnesium aluminate spinel powders prepared by the chemical co-precipitation, low temperature combustion and solid phase reaction methods were studied. The results show that the uniform nanometer magnesium aluminate spinel powders are prepared from precursor via the chemical co-precipitation, calcined at 700°C. Using the low temperature combustion method, the agglomeration, complete crystalline nanometer magnesium aluminate spinel powders are prepared at the thermal explosion temperature of 400°C. For the magnesium aluminate spinel micrometre powders synthesized by the solid phase reaction method, the phases are mainly spinel with a little of periclase and corundum phase. The sinterability of powders prepared by chemical co-precipitation method is the best, but that of powders synthesized by low temperature combustion and solid phase reaction methods are poor.
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