不同ZnO/Al_2O_3的LZAS系微晶玻璃的显微结构和性能  

MICROSTRUCTURE AND PROPERTIES OF LZAS SYSTEM GLASS-CERAMICS WITH DIFFERENT ZnO/Al_2O_3

作　　者：隋普辉[1] 陆雷[1] 张翠玲[1] 姜传飞[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《中国陶瓷》2008年第9期24-26,13,共4页China Ceramics

摘　　要：采用DTA、XRD、SEM、TEC(热膨胀系数)等测试方法研究了不同ZnO/Al2O3的LZAS玻璃体系的显微结构和热膨胀性能。结果表明:随着ZnO/Al2O3减小,基础玻璃的转变温度、第一放热峰温度和重熔温度逐渐增大;晶化温度为650℃时,各试样的主晶相均为γⅡ-LZS,并且热膨胀系数较大;750℃时,各试样的主晶相转变为γ0-LZS、β-石英固溶体和β-锂辉石固溶体,并且膨胀系数变小,晶体结构致密。同时发现,这两个温度的热膨胀系数在ZnO/Al2O3≈1.0～1.5(mol比)时发生较大变化。The effects of different ZnO/Al2O3 on the microstructure and thermal expansion coefficient（TEe） of LZAS system glass-ceramics were studied by DTA, XRD, SEM and TEe test. The results showed that with the decrease of ZnO/Al2O3 , the glass transition temperature, the first peak of crystallization temperature and the glass remeRing temperature increased gradually; when the glass was treated at 650℃ , the crystallization phase of βn-LZS occurred in all samples, which held larger TEe; when at 750℃ , the crystallization phase of all samples transformed into γ0- LZS, β-quartz solid solutions and β-spodumene solid solutions, and the TEe decreased, the crystal structure was compact. At the same time, the TEe changed a lot when ZnO/Al2O3 ≈1.0 - 1.5 （mol rate） at the two different temperature.

关 键 词：ZnO/Al2O3 微晶玻璃 晶相 热膨胀系数 

分 类 号：TQ174.758[化学工程—陶瓷工业] TB333[化学工程—硅酸盐工业]