STUDY OF THE INFLUENCE OF THE SYNTHESIS METHOD ON THE FORMATION OF ALUMINA-MAGNESIUM SPINEL ICROSTRUCTURE

The paper presents the results of preparation of powders for obtaining high-density ceramic material of magnesium aluminate spinel by two methods: spray pyrolysis from a solution of aluminum and magnesium nitrate salts and thermal synthesis from precipitated aluminum hydroxide and basic magnesium carbonate. The structure inheritance from one technology step to another is presented. The influence of the microstructure of the obtained powders on the reduction of the synthesis temperature of magnesium aluminate spinel is considered. The values of density for samples obtained by different methods are given.