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利用红外(IR)光谱、X射线衍射(XRD)、扫描电镜(SEM)等手段研究了CO2激光扫描弯曲对硼硅酸盐玻璃微观结构的影响。结果表明激光扫描产生的熔化冷却过程使玻璃存在轻微的分相倾向,导致玻璃中原先存在的[BO3]三角体结构单元与Na2O结合向[BO4]四面体结构转化,同时Si聚集程度提高,Si-O键强增加。未经激光加工样品存在SiO2晶相引起的微弱衍射峰,且晶粒呈大小不一的近似球状,激光扫描过的样品不存在明显晶相,呈较为均匀的玻璃态。
The effects of CO2 laser scanning bending on the microstructure of borosilicate glass were studied by means of IR, X-ray diffraction and scanning electron microscope (SEM). The results show that there is a slight phase segregation of glass in the melt cooling process of laser scanning. As a result, the original [BO3] triangular structural units in the glass combine with Na2O to transform to [BO4] tetrahedron, and the degree of Si aggregation increases. -O key increases. The samples without laser processing have weak diffraction peaks caused by the SiO2 crystal phase, and the grains are nearly spherical with different sizes. The laser-scanned samples have no obvious crystal phase and show a uniform glassy state.