摘要
采用传统熔体淬法制备了R2O-MO-B2O3-Al2O3-SiO2多元系统玻璃结合剂(R为碱金属,M为碱土金属)。利用红外光谱技术研究了玻璃的结构。测试了玻璃结合剂的抗弯强度和热膨胀系数,分析了玻璃组成及结构变化对玻璃性能的影响。结果表明:所有玻璃网络中均存在[SiO4]、[AlO4]四面体和[BO3]三角体结构单元。当SiO2增加到58.95mol%时,玻璃网络中出现[BO4]四面体,此时玻璃的抗折强度急剧下降,而膨胀系数由增大变成减小。SiO2含量为55.09mol%的样品适合用作CBN磨具玻璃结合剂。
The R2O- MO- B2O3 -Al2O3 -SiO2 system vitrified bond was prepared by conventional melt quenching technology （ R stands for alkali - metal element, M stands for alkali - earth element）. By taking a series of experiments, the bonding strength and the thermal expansion coefficients of the bond was tested, the structure of the glass was investigated by means of IR, and the performance of the bond was analyzed with different chemical compositions and the transformation of the structure. The results showed that there exited tetrahedral elements of [ SiO4 ], [ AlO4 ] and triquetrous elements of [ BO3 ] in the glass structure. When increasing the content of SiO2 to 58. 95% , [ BO4 ] can be found in the vitrified structure of the bond, and the bending strength decrease sharply, and the expansion coefficient change from increasing into decreasing.
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2007年第1期18-21,共4页
Diamond & Abrasives Engineering
基金
广西科学基金2003010
关键词
玻璃结合剂
红外光谱
抗折强度
热膨胀系数
vitrified bond
IR spectra
bonding strength
thermal expansion coefficient
