FIELD: technological processes.
SUBSTANCE: invention relates to sintered blank for dental application. Pre-sintered blank for dental application is glass ceramic based on lithium disilicate. Blank has relative density from 60 to 90 % with respect to true density of glass ceramic. Initial glass powder with average particle size < 100 mcm at pressure of 20 MPa to 200 MPa is subjected to uniaxial or isostatic pressing. Obtained pressed shape of powder glass for 2 to 120 minutes is subjected to heat treatment at temperature of at least 500 °C. Temperature of heat treatment is in area, which occupies at least 30 K, and where relative density varies by less than 2.5 %.
EFFECT: reduced shrinkage during sintering.
15 cl, 2 dwg, 3 tbl, 6 ex
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