文献类型：期刊文献

中文题名：离子交换法研制变折射率玻璃

英文题名：Study on the Preparation of Glass with Refractive-Index Gradient by Ion-Exchange

作者：杜永娟[1];蒋幼梅[1]

机构：[1]华东化工学院无机材料系

年份：1990

卷号：16

期号：4

起止页码：421

中文期刊名：华东化工学院学报

外文期刊名：Huadong Huagong Xueyuan xuebao

收录：国家哲学社会科学学术期刊数据库;EI(收录号：1991060146305);Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：特种玻璃;离子交换法;变折射率玻璃

外文关键词：special glass;chemcor glass;ion exchange process;glasses with index gradient;lithia-magnesia-silica glass;soda-alumina-silica glass

摘要：用Na^+-Li^+和Ag^+-Na^+离子交换研制变折射率玻璃。用电子探针测定交换后玻璃中的Na_2O和Ag_2O浓度分布,求得互扩散系数。用干涉剪像法测定了玻璃表面的折射率分布。在实验温度下,渗透深度与交换时间平方根成正比。锂镁硅系玻璃在400℃的95%NaNO_3-5%Na_2SO_4盐浴中交换196h后,渗透深度达1.26mm;交换60h后,表面与内部折射率差为-0.026。锂镁铝硅玻璃在420℃的同样溶液中交换180h后,渗透深度达1.40mm。400℃时这两种玻璃中Na^+-L^+互扩散系数分别为10^(-10)～10^(-6)cm^2s^(-1)和2.3x10^(-11)～2.4～10^(?)cm^2s^(-1),它随Na_2O相对浓度的增加而增加。钠铝硅玻璃在490℃的AgCl盐浴中处理124h后,Ag^+的渗透深度达2.70mm,折射率差为0.024,随着Ag_2O相对浓度的增加,Ag^+-Na^+互扩散系数从9x10^9增加到1.8x10^8cm^2s^(-1)。
Glasses with index gradient were prepared by both Na^+-Li^+ and Ag^+-Na^+ ionexchange processes. The Na_2O-and Ag_2O-concentration distribution was determined using electron microprobe, from which the Na^+-Li^+ and the Ag^+-Na^+ interdiffusion coefficients were evaluated. The refractive-index distribution in glass was determined by shearing-interference method. The penetration depth of Na^+ ions in the experimental lithia-magnesiasilica glass, which has been ion-exchanged in 95 NaNO_3-5 Na_2SO_4(wt%) at 400 ℃ for 196 h, is about 1.26 mm. △ n between the surface and the interior of the glass exchanged for 60 h is-0.026. The penetration depth in the lithia-magncsia-alumina-silica glass, which has been ion-exchanged in the same melt at 420℃ for 180 h, is about 1.40 mm. With the increz ase of the Na_2O relative concentration in glasses, the Na^+-Li^+ interdiffusion coefficients at 400 ℃ in the former and in the latter increase from 10^(-10) to 10^(-8) cm^2s^(-1) and from 2.3×10^(-11) to 2.4×10^(-9) cm^2s_(-1) respectively. After immersion in AgCl melt at 490 ℃ for 124 h, the penetration depth of Ag^+ ions in soda-alumina-silica glass reaches 2.70 mm, △n is 0.024, with the increase of the Ag_2O relative concentration, the Ag^+-Na^+ interdiffusion coefficent increases from 9×10^(-9) to 1.8×10^(-8) cm^2s^(-1).