材料科学
兴奋剂
复合材料
断裂韧性
陶瓷
Crystal(编程语言)
抗弯强度
维氏硬度试验
玻璃陶瓷
矿物学
微观结构
化学
计算机科学
光电子学
程序设计语言
作者
Shaohua Luo,Zihan Wang,Xian Zhang,Wu H,Yuhe Wang,Yuxin Dou,Shengxue Yan,Yingying Chen
标识
DOI:10.1016/j.jnoncrysol.2022.122026
摘要
This study is to investigate the effect of Ce and Er doping on the mechanical properties of Li2O-Al2O3-SiO2 system glass-ceramics. Orthogonal test was used to explore the formulation of dental lithium disilicate glass-ceramics with the best mechanical properties. On this basis, rare earth elements Ce and Er were doped to investigate the effect of doping on the crystal morphology and mechanical properties of glass-ceramics, and the chemical stability of the doped samples was evaluated. Through many experiments, the optimal raw material composition for preparing Li2O-Al2O3-SiO2 glass-ceramics was determined as follows: Li:Si 76:24, NH4H2PO4 3%, Al2O3 10%, and K2CO3 3%, The highest hardness is 672 MPa and the highest fracture toughness is 306 MPa. The doping results show that a certain amount of Ce or Er on the surface can make the matrix glass grow into radial flake or lamellar crystals. Radial crystals can improve the fracture toughness of glass-ceramics, but reduce its hardness. The hardness of laminated crystal glass ceramics increases, but the bending strength decreases.
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