Abstract Effects of Na2O/BaO ratio on the structure and the physical properties of Li2O-Al2O-B2O3-SiO2 low-temperature glass-ceramic vitrified bonds had been systematically studied. Structure and properties of as-quenched samples were analyzed by DSC, FTIR, and Raman. According to the results of (X3)2/X2 derived from deconvolution results of Raman, the degree of polymerization (DOP) of glass structure decreased with increasing Na2O/BaO. In addition, LiAlSi2O6 and LiAlSi3O8 were the major crystalline phases in the vitrified bonds sintered at 730 °C for 2 h. Meanwhile, Li2SiO3 and BaAl2Si2O8 were determined as the minor crystalline phases by XRD. The results showed that the addition of Na2O promoted the coefficient of thermal expansion (CTE) of vitrified bonds sintered at 730 °C for 2 h. Bending strength tests and SEM indicated that the optimum content of dispersed plate-like BaAl2Si2O8 crystals inlaid in A2 (Na2O/BaO = 0.33) vitrified bonds contributed to showing the highest mechanical strength among the five samples. Moreover, SEM and EDS proved the wettability between A2 vitrified bonds and cBN grains were effective.

中文翻译：

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Na 2 O/BaO比对低温微晶玻璃陶瓷键结构和物理性能的影响

摘要 系统研究了Na2O/BaO比对Li2O-Al2O-B2O3-SiO2低温微晶玻璃陶瓷键合结构和物理性能的影响。通过 DSC、FTIR 和拉曼分析淬火样品的结构和性能。根据拉曼解卷积结果得出的(X3)2/X2结果，玻璃结构的聚合度(DOP)随着Na2O/BaO的增加而降低。此外，LiAlSi2O6 和 LiAlSi3O8 是在 730°C 下烧结 2 小时的玻璃化键中的主要结晶相。同时，通过 XRD 确定 Li2SiO3 和 BaAl2Si2O8 为次要结晶相。结果表明，Na2O 的添加提高了在 730°C 下烧结 2 小时的玻璃化键的热膨胀系数 (CTE)。弯曲强度测试和 SEM 表明，镶嵌在 A2 (Na2O/BaO = 0.33) 玻璃化键中的分散板状 BaAl2Si2O8 晶体的最佳含量有助于显示五个样品中最高的机械强度。此外，SEM 和 EDS 证明 A2 玻璃化键和 cBN 晶粒之间的润湿性是有效的。