Al/Si和B/Na摩尔比对钠钙铝硅系玻璃结构和耐久性的影响(英文)

Effects of Al/Si and B/Na Mole Ratios on Structure and Durability of Na_2O-CaO-Al_2O_3-SiO_2 Glasses

研发一种新型浮法玻璃对商业平板玻璃领域具有重要意义。通过熔化-退火法制备了2个系列具有不同的Al/Si摩尔比和B/Na摩尔比的Na2O-CaO-Al2O3-SiO2系玻璃。采用INVIA共焦显微Raman光谱仪对玻璃结构进行测试,通过Qn(n=1,2,3,4)结构单元的变化、NBO/NBO+BO和NBO/tetrahedron来表征玻璃结构。玻璃耐久性通过电感耦合等离子体光谱仪、光学显微镜和扫描电子显微镜进行表征,并测试玻璃在去离子水和混合碱溶液中的失重。研究结果:增加Al/Si摩尔比和B/Na摩尔比,2个系列玻璃中Qn单元分配情况的变化有所不同,NBO/NBO+BO和NBO/tetrahedron均逐渐减小。非桥氧数量的减少同时抑制了钠离子的浸出和骨架结构的溶解。钠含量对玻璃耐久性的影响强于玻璃形成体。

Two series of Na20-CaO-A1203-SiO2 system glasses with different A1/Si and 13/Na mole mole ratios were prepared by a meltingquenching method. The structures of the glasses were characterized by an INVIA confocal microRaman spectrom- eter based on the tetrahedra structural unit Q1（n=1, 2, 3, 4）, NBO/NBOff-BO and Nl30/tetrahedron. The glass durability was determined by inductively coupled plasma-atomic emission spectroscopy （ICP-AES）, optical microscopy and scanning elec- tron microscopy, respectively. The mass losses of glasses in deionized water and alkaline solution were measured. The results show that the Q1 unit distributions in two series of the glasses are different, and the NBO/NIK）q-BO and NBO/tetrahedron both decrease with increasing the AI/Si and B/Na mole ratios. The reduction of NBO content can enhance the leaching resist- ance of sodium ions and decrease the network dissolution. The effect of sodium content on the glass durability is dominant rath- er than the effect of the network formation.