公开(公告)号：US4605428A

公开(公告)日：1986-08-12

申请号：US637492

申请日：1984-08-03

申请人： David W. Johnson, Jr. ,  John B. MacChesney ,  Eleizer M. Rabinovich

发明人： David W. Johnson, Jr. ,  John B. MacChesney ,  Eleizer M. Rabinovich

IPC分类号： C03B19/12 ,  C03B37/016 ,  C03B19/06

CPC分类号： C03B19/12 ,  C03B37/016 ,  Y02P40/57

摘要： High silica glass is formed by sintering a dried gel. The gel has a pore size distribution such that at most about 5% of the total pore volume is contributed by pores having an effective pore diameter greater than about 0.5 .mu.m, and such that at least 10% of the total pore volume is contributed by pores having an effective pore diameter greater than about 0.02 .mu.m. This pore size distribution permits effective migration of fluid into, and out of, the gel, permits sintering at a lower temperature, and results in increased perfection of the glass. The pore size distribution can be achieved by appropriate comminution, e.g., ball-milling, of intermediate material. A novel process for forming high silica glass is also disclosed. The process comprises forming intermediate material by hydrolysis of one or more metal alkoxides, comminuting the intermediate material to produce colloidal particles, forming a sol by dispersing the particles in liquid, gelling the sol, drying the gel, and sintering the dried gel.

摘要翻译： 通过烧结干燥的凝胶形成高二氧化硅玻璃。 凝胶具有孔径分布，使得总孔体积的至多约5％由具有大于约0.5μm的有效孔径的孔贡献，并且使得总孔体积的至少10％由 具有大于约0.02μm的有效孔径的孔。 这种孔径分布允许流体有效地迁移到凝胶中并离开凝胶，允许在较低温度下进行烧结，并且导致玻璃的完全增加。 孔径分布可以通过中等材料的适当粉碎，例如球磨来实现。 还公开了一种用于形成高二氧化硅玻璃的新方法。 该方法包括通过一种或多种金属醇盐的水解形成中间体材料，粉碎中间体材料以产生胶体颗粒，通过将颗粒分散在液体中形成溶胶，胶凝，干燥凝胶和烧结干燥的凝胶。