摘要
用X光衍射方法确定了Li_2-Al_2O_3-SiO_2系统微晶玻璃中的结晶相,并由此得出其结晶度。用1090B热分析仪测量其热膨胀特性,得出了热膨胀和结晶度的关系,以及热膨胀和晶化温度的关系。用差热分析方法得出了微晶玻璃的比热几乎不随结晶度变化而变化的结论。
The crystal phases in Li_2O--Al_2O_3--SiO_2 system glass-ceramics were determined by X-ray di-ffraction and then their crystallinities were obtained. The thermal expansion of glass--ceramics wasmeasured with the Thermal Analyzer 1090B. The relationship not only between thermal expan-sion and crystallinity but also between thermal expansion and crystallizing temperature is illustra-ted. DTA showed that specific heat of glass-ceramics hardly changes with crystallinity.
关键词
微晶玻璃
晶化
热学性质
二氧化硅
Crystallinity
thermal expansion
specific heat
crystallizing dynamics
