摘要 |
Alkali silicate glass contains 55.0-71.0 wt.% silica (SiO2), 5.0-16.0 wt.% alumina (Al2O3), 0.2-10.0 wt.% boron oxide (B2O3), 4.5-10.0 wt.% potassium oxide (K2O) and 3.0-14.0 wt.% sodium oxide (Na2O). Also claimed are (a) a method of producing the glass; and (b) dental material and moulded dental products containing the glass. The glass ceramic is produced by (a) melting a glass containing the specified components at 1200-1650 degrees C, (b) granulation by pouring the melt into water, (c) optionally pulverising to an average particle size of 1-450 mu m; and (d) thermal treatment of the granulate or powder for 30 minutes to 6 hours at > 900 degrees C and ≤ 1200 degrees C. |
申请人 |
IVOCLAR AG, SCHAAN, LI |
发明人 |
DRESCHER, HELGA, FELDKIRCH, AT;FRANK, MARTIN, DIPL.-ING., SCHAAN, LI;HOELAND, WOLFRAM, PROF. DR., SCHAAN, LI;RHEINBERGER, VOLKER, DR., VADUZ, LI |