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    王浩, 陆雷, 张乐军, 赵莹. 加热温度对烧结制备Li2O-Al2O3-SiO2系玻璃陶瓷显微结构的影响[J]. 机械工程材料, 2008, 32(2): 24-26.
    引用本文: 王浩, 陆雷, 张乐军, 赵莹. 加热温度对烧结制备Li2O-Al2O3-SiO2系玻璃陶瓷显微结构的影响[J]. 机械工程材料, 2008, 32(2): 24-26.
    shu
    WANG Hao, LU Lei, ZHANG Le-jun, ZHAO Ying. Effect of Sintering Procedure on Microstructure of Li2O-Al2O3-SiO2 Glass-ceramics[J]. Materials and Mechanical Engineering, 2008, 32(2): 24-26.
    Citation: WANG Hao, LU Lei, ZHANG Le-jun, ZHAO Ying. Effect of Sintering Procedure on Microstructure of Li2O-Al2O3-SiO2 Glass-ceramics[J]. Materials and Mechanical Engineering, 2008, 32(2): 24-26.
    shu

    加热温度对烧结制备Li2O-Al2O3-SiO2系玻璃陶瓷显微结构的影响

    Effect of Sintering Procedure on Microstructure of Li2O-Al2O3-SiO2 Glass-ceramics

      摘要
    • 摘要: 以Li2O-Al2O3-SiO2(LAS)系为基础玻璃成分,以碳酸锂、二氧化硅、氧化铝等为原料,采用烧结法制备了LAS系微晶玻璃.使用DTA分析了玻璃的析晶过程,运用XRD、SEM等测试分析手段对材料的晶相和晶粒大小进行了观察和分析,并讨论了加热温度对制品的烧结程度、主晶相及晶粒大小的影响.结果表明:当温度低于940 ℃时,所制微晶玻璃的主晶相为β-石英固溶体,高于940 ℃时主晶相转变为β-锂辉石;在1 120 ℃时,烧结效果最好,在1 170 ℃晶化效果最好,晶粒尺寸为0.5~3 μm.

       

      Abstract: Li2O-Al2O3-SiO2 (LAS) glass-ceramics are widely used to manufacture heating equipment because of its advantages such as low expansion,excellent mechanical properties and high heat resistance.LAS were prepared via sintering method,using some chemical regents as raw materials.The crystallization process of LAS system glass-ceramic was analyzed by means of DTA.Phase composition and microstructure were investigated by XRD and SEM.The influence of temperature on the major crystalline phase and crystallite size was discussed.The results show that the major crystalline phase of the glass-ceramics is β-quartz when the sample was crystallized below 940 ℃ and the major crystalline phase of the sample was β-spodumene when the crystallization temperature was above 940 ℃.The sintering at 1 120 ℃ and the crystallization at 1 170 ℃ are the best.The crystallite size is 05-3 μm.

       

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