Activating process of geopolymer source material: Kaolinite
Activating process of geopolymer source material: Kaolinite
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DOI：
10.1007/s11595-009-1132-6
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发表时间：
2009-03
期刊：
影响因子：
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通讯作者：
Zuhua Zhang;X. Yao;Huajun Zhu;Sudong Hua;Yue Chen
中科院分区：
文献类型：
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作者：
Zuhua Zhang;X. Yao;Huajun Zhu;Sudong Hua;Yue Chen
用差示扫描量热法和热重法（DSC-TG）记录了煅烧过程。通过计算和比较内羟基和表面羟基之间的O-H键长度，以及Al-OH的离子键和-OH的位置，将脱羟基（活化过程）划分为两个步骤。x射线衍射（XRD）和抗压强度测试表明，煅烧材料在脱羟基区活性随温度升高而升高，而在尖晶石区活性突然下降。高岭石活化的建议温度为900℃。
The calcining process was recorded by differential scanning calorimetry and thermogravimetry (DSC-TG). The dehydroxylation (activating process) was partitioned into two steps by calculating and comparing the O—H bond lengths between inner hydroxyl group and surface hydroxyl group, as well as the ionic bond of Al—OH and position of —OH. X-ray diffraction (XRD) and compressive strength measurement show that the activity of calcined materials increases with the increasing of temperature in dehydroxylation region but decreases abruptly in the “spinel” region. The suggested temperature for activating kaolinite is 900 °C.