【摘要】 在探讨Na₂O-TiO₂-SiO₂ 系玻璃组成对其性质、结构影响的基础上,研究了提高该系玻璃的化学稳定性问题,通过X射线微电子探针测定水侵蚀该系玻璃的表面成分变化;离子选择电极法和分光光度法测定水侵蚀物中微量K⁺、Na⁺、Ti⁴⁺离子的量,阐明了水侵蚀该系玻璃的机理,认为主要是由R⁺离子扩散及与H⁺离子交换作用控制其侵蚀过程。研究和讨论了混合碱效应对该系玻璃化学稳定性的影响及应用,以及二氧化钛在该系玻璃中及玻璃表面层的结构状态。发现在较多量碱金属氧化物情况下（含21％）,当R₂O/TiO₂?1、K₂O/Na₂O?2.5、TiO₂/SiO₂?0.4时,可以得到具有实用价值的高化学稳定性的15K₂O·6Na₂O·26TiO₂·53SiO₂稳定玻璃。更多还原

【Abstract】 Methods for improving the chemical durability of Na₂O-TiO₂-SiO₂ glasses were studi-ed, based on the investigation of the effect of the glass composition on the properties andstructure of the glasses.The mechanism of water corrosion of the glasses was investigatedaccording to the change in composition of the glass surface resulting from water corrosionby means of the electron probe microanalyzing technique and to the amount of ions K⁺,Na⁺ and Ti⁴⁺ in the water corroded solution by means of ion selective electrode and spec-trophotometric methods.It is concluded that the corrosion process is controlled mainly bythe diffusion of ion R⁺ and the interaction with H⁺.The mixed alkali effect on the chemi-cal durability of the glasses and its applications as well as the structure of TiO₂ in theglass and on the surface of the glass were also studied.It is found that, in the case thatthe content of alkali oxide in more than 21%, 15K₂O·6Na₂O·26TiO₂·53SiO₂ glasses withhigh chemical durability for practical purposes can be obtained when R₂O/TiO₂?1,K2O/Na₂O?2.5,and TiO₂/SiO₂?0.4.更多还原