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SEIKO MITACHI SHUICHI SHIBATA SHIRO TAKAHASHI 《Journal of the American Ceramic Society》1981,64(12):692-696
The glass system SiO2 -B2 O3 -BaO-Na2 O was investigated to obtain high-refractive-index glasses for high-numerical-aperture (N.A.) optical fibers. Compositions having a mole ratio [B2 O3 ]/[BaO+Na2 O]=2 have unique properties. They are both highly viscous and chemically durable despite the fact that they contain highly alkaline metals and alkaline-earth metals. Glass properties at this mole ratio are favorable for optical fibers. It is proposed that the composition for core glass of high-N. A. optical fibers be based on this mole ratio. 相似文献
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