本文研究了白榴石增强的牙科玻璃陶瓷的热处理制度对白榴石晶体的生成、玻璃陶瓷的耐腐蚀性和力学性能的影响,采用热分析、X射线衍射分析、力学性能表征及金相显微观察等方法对热处理后的牙科玻璃陶瓷进行测试和分析.热分析表明,玻璃陶瓷晶核的生成温度为760℃,晶核的成长温度为1010℃.试验采用阶梯式升温热处理制度,成功地在玻璃陶瓷中析出白榴石晶体,随着白榴石含量的增加,材料的力学性能也获得了提高,热处理后材料的三点弯曲强度为102.2 MPa,显微硬度为5.45 GPa,断裂韧性为2.41 MPa·m1/2,强度达到ISO6872牙科陶瓷材料的标准.
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