中文摘要：

以K2O-MgO-Al2O3-SiO2-F系统的微晶玻璃为基础，与不同量的Y-TZP粉体进行复合，制备出了用于牙科修复的新型全瓷材料。借助于DTA、XRD、SEM等研究了该材料的主晶相种类和显微结构，并测试了复合材料的抗折强度、体积密度、维氏硬度、热膨胀系数和耐酸（碱）性等理化性能。实验结果表明：复合材料的主晶相为氟金云母、t-ZrO2和少量的m-ZrO2；其具有优于天然牙齿和牙釉质的力学性能，化学性能稳定、审美效果良好，适用于制作前牙冠、贴面、嵌体等口腔修复体。

英文摘要：

A kind of new composites for dental restorations is prepared by adding Y-TZP powder to K2O- MgO-Al2O2-SiO2-F system. The main crystalline phases in the composites, fluophlogopite , t-ZrO2 and m-ZrO2, are identified with the help of DTA, SEM, XRD. Besides, the strength, ulk density, rigidity and chemical stability of the compositions are tested. The results show that the composites have fine physical and chemical properties, and aesthetics effect. Therefore, the composites are expected to be used for producing front dental crown, veneer restoration or embedded body.