FIELD: chemistry.
SUBSTANCE: invention relates to the technology of producing ceramic articles based on aluminium oxide with high mechanical properties, meant for prolonged operation in conditions of high wearing loads. The method of producing articles from alumina ceramic involves mixing submicron finely dispersed aluminium oxide with particle size 190-210 nm with modifying additives of nanopowder of aluminium oxide, magnesium oxide and amorphous silicon dioxide. Components of the mixture of Al2O3 submicron powder, Al2O3 nanopowder, MgO and SiO2 nanopowder are ratio of 100:2.95:2.0:0.05 (wt %). The obtained powder mixture is pressed and sintered at temperature 1400-1600°C.
EFFECT: high microhardness of articles.
2 ex, 3 dwg
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