中南大学学报（自然科学版）2009，Vol.40Issue(5)：1270-1275,6.
玻璃组成对CaO-Al_2O_3-SiO_2系玻璃烧结、晶化和性能的影响
Effect of composition on sintering, crystallization behavior and properties of CaO-Al_2O_3-SiO_2 system glass
摘要
Abstract
Glass-ceramics with main crystalline phases of anorthite were prepared by sintering method. The effect of glass composition on sintering and crystallization behavior as well as properties of the glasses were investigated by using differential thermal analysis (DTA), X-ray diffraction(XRD), scanning electron microscopy (SEM) and property measurements. The results show that the increase of CaO content decreases the glass transition temperature (T_g) and the crystallization peak temperature (T_p) of anorthite-based glasses and makes the crystallization exothermic peak sharp. The crystallization activation energy of the glasses decreases and the glass crystallization improves with the increase of CaO content. The glass transition temperature (T_g) and the crystallization peak temperature (T_p) shift to high temperature and the glass crystallization becomes hard with the increase of SiO_2 content. The sintering temperature of the glass samples reduces with the increase of CaO contents. Whereas, overfull CaO content will improve the precipitation of Ca_2SiO_4 phases and enhance the dielectric constant and the thermal expansion coefficient of samples. On the other hand, the increase of SiO_2 content can lead to the thermal expansion coefficient to decrease and the dielectric properties of glass-ceramics improve. The prepared glass-ceramics exhibit high relative density (≥98.3%), moderate dielectric constant (6.9-7.5), low dielectric loss (≤0.1%), low thermal expansion coefficient (3.8×10~(-6)-4.5×10~(-6) /℃), low sintering temperature (900-1000 ℃) and low temperature coefficient of dielectric content (66×10~(-6)-113×10~(-6) /℃), as well, which can be applicable in the electronic packaging field.关键词
玻璃组成/钙长石/微晶玻璃/晶化Key words
glass composition/ anorthite/ glass-ceramics/ crystallization分类
化学化工引用本文复制引用
陈国华,唐林江,职利,成钧,刘心宇..玻璃组成对CaO-Al_2O_3-SiO_2系玻璃烧结、晶化和性能的影响[J].中南大学学报（自然科学版）,2009,40(5):1270-1275,6.基金项目
广西自然科学基金资助项目(0339066) （0339066）
桂林电子科技大学学科软环境建设资助项目(Z20695) （Z20695）
