The present invention provides a method for preparing a glass-ceramic containing leucite crystals, comprising the steps of: mixing (1) a glassy material comprising 53 to 65 wt.% of SiO2, 13 to 23 wt.% of Al2O3, 9 to 20 wt.% of K2O and 6 to 12 wt.% of Na2O and (2) synthetic leucite seed crystals comprising 53 to 64 wt.% of SiO2, 19 to 27 wt.% of Al2O3 and 17 to 25 wt.% of K2O, and heat-treating the mixture at 750 to 950 DEG C for 1 to 5 hours; and a dental porcelain powder and a metal-ceramic restoration both comprising a glass-ceramic prepared by the method. The porcelain comprising the glass-ceramic prepared by the method is substantially free of opacification and decrease in the coefficient of thermal expansion, during fusion-bonding to a metal frame.
展开▼
机译：本发明提供了一种用于制备含有微晶的玻璃陶瓷的方法，该方法包括以下步骤：混合（1）包含53至65重量％的SiO 2，13至23重量％的Al 2 O 3，9至20的玻璃状材料。重量百分比的K2O和6至12重量％的Na2O和（2）合成白晶种晶，包含53至64重量％的SiO2、19至27重量％的Al2O3和17至25重量％的K2O，将该混合物在750〜950℃热处理1〜5小时。以及包含通过该方法制备的玻璃陶瓷的牙科用瓷粉和金属陶瓷修复体。包括通过该方法制备的玻璃陶瓷的瓷器在熔融结合至金属框架的过程中基本上不浑浊并且热膨胀系数降低。
展开▼
