Definition of Glass (continued) 玻璃定义（接续） Side Note (continued): 边注：
-Obsidian is a natural occurring glass as a result of volcanic lava coming in contact with water. ]黑曜石是火山熔岩遇水冷却后形成的天然的玻璃。
-Quartz is the most common crystal on the face of Earth 石英是地球表面一种十分常见的晶体。
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Glass Structure 玻璃的结构
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Glass Structure玻璃的结构
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Glass Formation Basics 玻璃构成要素
Glass formers present: 玻璃形成体 SiO2
B2O3 High bond strength 高的粘结力 GeO2 P2O5
Al2O3(4CN)
Intermediate Glass formers: 玻璃中间体 TiO2 Z
PbO Low bond strength 低的粘结力 Al2O3(4CN)
Glass modifiers 玻璃改进体 CaO
MgO Mechanical and
Na2O optical properties 力学和光学性能 K2O
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E-GLASS ASTM D578-99
E 玻璃纤维 美国ASTM标准
―A family of calcia-alumina-silica glasses which has the following certified chemical composition and which is used for general purposes and most electrical applications.‖
“钙率硅酸盐玻璃具有下列指定的化学成分，它被广泛的应用在电子技术中。” Electrical General 电子技术中 一般情况下 Glass oxide % By Weight % By Weight 玻璃氧化物 比重 比重 B2O3 5-10 0-10 CaO 16-25 16-25 Al2O3 12-16 12-16 SiO2 52-56 52-56 MgO 0-5 0-5 Na2O and K2O 0-2 0-2 TiO2 0-0.8 0-1.5 Fe2O3 0.05-0.4 0.05-0.8 F2 0-1.0 0-1.0
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