Synthesis and characterization of cordierite ceramic from Moroccan stevensite and andalusite
Synthesis and characterization of cordierite ceramic from Moroccan stevensite and andalusite
复制标题
DOI：
10.1016/j.clay.2010.06.004
复制
发表时间：
2010-07
影响因子：
5.6
通讯作者：
R. Bejjaoui;A. Benhammou;L. Nibou;B. Tanouti;J. Bonnet;A. Yaacoubi;A. Ammar
中科院分区：
文献类型：
--
作者：
R. Bejjaoui;A. Benhammou;L. Nibou;B. Tanouti;J. Bonnet;A. Yaacoubi;A. Ammar
堇青石（2MgO - 2Al2O3 - 5SiO2）是目前具有广泛应用前景的陶瓷材料。本研究描述了用摩洛哥丰富的原料红柱石（al2o3和SiO2的来源）和“Ghassoul”粘土（MgO和SiO2的来源）混合生产堇青石陶瓷。粘土主要由粘土组成。分别在1150、1250和1350℃下烧结2h（尺寸<40μm）。采用x射线衍射（XRD）、差热分析（DTA）、热膨胀仪和扫描电镜（SEM）研究了烧结过程中形成的相和结构变化。在1150°C和1250°C烧结时，堇青石和红柱石是主要相。还观察到少量的顽辉石、莫来石和方英石。在1350℃时，只观察到堇青石。DTA曲线在1350℃左右的放热峰对应堇青石的固态形成。
Cordierite (2MgO−2Al2O3−5SiO2) is currently an attractive ceramic material for various applications. This study describes the production of cordierite ceramic by mixing Moroccan abundant raw materials: andalusite (source of Al2O3and SiO2) and “Ghassoul” clay (source of MgO and SiO2). The clay consists mainly of stevensite. The mixtures (size <40μm) were sintered at 1150, 1250 and 1350°C for 2h. The phases formed and structural changes by sintering were investigated by X-ray diffraction (XRD), differential thermal analysis (DTA), thermal dilatometry and scanning electron microscopy (SEM). Cordierite and andalusite were the major phases in samples sintered at 1150°C and 1250°C. Small amounts of enstatite, mullite and cristobalite were also observed. At 1350°C, only cordierite was observed. The exothermic peak of the DTA curve at about 1350°C corresponded to the solid-state formation of cordierite.