钛合金封接玻璃与金属钛润湿性差，导致钛合金封接气密性差。与金属钛浸润性良好的低硅硼酸盐玻璃有望解决钛合金封接气密性的问题，但其耐水性差，将降低钛合金封接的表面绝缘电阻。因此，本研究以CaO-Al2O3-B2O3系统玻璃为研究对象，分析SiO2取代Al2O3过程中玻璃网络结构的变化，及其对玻璃水解行为的影响。研究表明，水解行为由Ca-O-BⅣ结构中Ca2+离子的水化行为开始，接下来B3+的溶出使水解逐步由“横向”转变为深入玻璃网络结构的“纵向”，并在玻璃表面形成“绒毛”结构。Ca-O-Si结构可抑制Ca2+离子的水化行为，使玻璃的水解停留在“横向”阶段，不破坏玻璃内部网络结构。

Titanium alloy sealing glass exhibits poor wettability with titanium metal, resulting in suboptimal airtightness for titanium alloy sealing. Low-silicon borate glass, which demonstrates excellent wettability with titanium metal, holds promise for addressing the airtightness issues of titanium alloy sealing. However, its poor water resistance reduces the surface insulation resistance of titanium alloy seals. This study focuses on CaO-Al2O3-B2O3 glass to analyze changes in the glass network structure during the substitution of Al2O3 with SiO2 and its impact on the glass’s hydrolysis behavior. The results indicate that hydrolysis begins with the hydration of Ca2+ in the Ca-O-BⅣ structure, followed by B3+ dissolution, which transitions hydrolysis from a “lateral” process to a “vertical” penetration into the glass network. This process leads to the formation of a “fuzzy” structure on the glass surface. The Ca-O-Si structure can inhibit the hydration of Ca2+, restricting hydrolysis to the “lateral” phase and preserving the integrity of the internal glass network structure.

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