| 专利名称： | METHOD FOR PREPARING GLASS-CERAMIC |
| 公开（告）号： | |
| 公开（公告）日： | 2007-04-12 00:00:00 |
| 申请（专利）号： | DE20016023013T(DE60123013T) |
| 申请日： | 2001-01-05 00:00:00 |
| 发明（设计）人： | YAMAMOTO PRECIOUS METAL CO LTD (JP) |
| (申请)专利权（人）： | HOSHIKAWA TAKESHI (JP);YAMAZOE MASATOSHI (JP) |
| 内容： | 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. |
发布日期：2007-08-27 10:36:00