PRODUCTION METHOD OF ARTICLES FROM HIGH-TENSILE CERAMICS Russian patent published in 2017 - IPC C04B35/486 C04B35/632 B29C45/73 

FIELD: metallurgy.

SUBSTANCE: production method of the high-tensile ceramics involves the plasma-chemical powder preparation from the tetragonal zirconium oxide and aluminium oxide, its mixing with the organic binder (plasticiser), moulding, removing the binder in the backfill and calcining. The moulding slip is prepared from the mixture of plasma-chemical ultradisperse powder, containing 75-82 wt % of zirconium oxide, 15-20 wt % of aluminium oxide, 3-5 wt % of lithium oxide, including the plasticiser in the amount of 25-60 wt % of the mixture mass. The slip is moulded in the die mould, heated up to 60-85°C, into the blank under the pressure of 0.3-0.6 MPa, are calcinated in the backfill to remove the plasticiser, then the moulded blank is sintered at the temperature 1690-1800°C.

EFFECT: ceramic products with the claimed composition and the specified sintering parameters have the bending strength of at least 1215 MPa, the produced ceramic blanks are characterized by the high impact strength, heat resistance and heat stability.

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