但是低膨胀的玻璃比碱石灰玻璃可贵多了。
But low-expansion glass is much costlier than soda-lime glass.
该法比烧碱石灰法有诸多优点，碱耗较高是其不足。
This new method had advantage over the caustic soda lime one, despite its higher sodium hydroxide consumption.
传统的碱石灰玻璃膨胀过大，焊接会带来很大的应力从而导致失效。
Conventional soda-lime glass expands too much, so welding introduces stresses that can lead to failure.
它不结晶的结构往往是通过在玻璃化转变温度以下迅速冷却而得到，对于碱石灰玻璃而言，大约在华氏温度1000度左右。
The noncrystalline structure is achieved by relatively rapid cooling below what is referred to as the glass transition temperature, around 1, 000 degrees Fahrenheit for the soda-lime variety.
“多年来，碱石灰玻璃的基本组分没有什么大的变化。”Alfred大学玻璃研究中心的主管HarrieJ . Stevens说。
"For years, the basic composition of soda-lime glass has not changed much," said Harrie J. Stevens, director of the Center for glass Research at Alfred University.
“多年来，碱石灰玻璃的基本组分没有什么大的变化。”Alfred大学玻璃研究中心的主管HarrieJ . Stevens说。
"For years, the basic composition of soda-lime glass has not changed much," said Harrie J. Stevens, director of the Center for glass Research at Alfred University.
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