K2O-Na2O-Al2O3-SiO2系统牙科微晶玻璃匹配氧化铝陶瓷的初步研究

目的:研究 K₂O-Na₂O-Al₂O₃-SiO₂系统牙科微晶玻璃匹配氧化铝陶瓷的热处理温度制度。方法:根据氧化铝陶瓷的热膨胀系数调整K₂O-Na₂O-Al₂O₃-SiO₂系统牙科微晶玻璃的原材料配比,利用K₂O-Na₂O-Al₂O₃-SiO₂系统牙科微晶玻璃的热处理温度制度形成微晶玻璃-氧化铝陶瓷复合材料;利用偏振光显微镜和X射线衍射分析仪观察样品的形态及显微结构特性,利用材料试验机测试材料的抗压强度。结果:经过原材料组份的调整,白榴石晶粒约1.0 μm、在玻璃基质中分布均匀;微晶玻璃-氧化铝陶瓷复合材料的抗压强度为500 MPa。结论:K₂O-Na₂O-Al₂O₃-SiO₂系统牙科微晶玻璃的热处理温度制度适合匹配氧化铝陶瓷。

Preliminary Study on K2O-Na2O-Al2O3-SiO2 System Dental Glass Ceramics Matching Al2O3 Ceramics

Objective: Research the thermal treatment schedule of K₂O-Na₂O-Al₂O₃-SiO₂ system dental glass ceramics matching Al2O3 ceramics. Methods: Select and analysis the raw material according to K₂O-Na₂O-Al₂O₃-SiO₂ system ,produce glass - Al₂O₃ composite ceramic material. The products were analyzed by polaring microscope and X-ray diffractometer, the compressive strength was tested by material machine. Results: Leucite microcrystal was about 1.0μm, distributed in the glass matrix evenly; The compressive strength was about 460MPa, even the interface of glass combined with Al₂O₃ ceramics need in-depth exploration. Conclusion: K₂O-Na₂O-Al₂O₃-SiO₂ system dental glass ceramics can be sintered and match Al₂O₃ ceramics with special thermal treatment schedule.