【摘要】 本文对广东和平蒙脱石及其热处理产物进行了化学分析、差热和热重分析、 Ｘ 射线粉末衍射分析、红外吸收光谱分析、原子力显微镜及魔角旋转核磁共振等研究结果表明， 蒙脱石在热处理温度为５００ ～７００‘ Ｃ 时， 其 Ｓｉ、 Ａｌ 的 Ｍ Ａ Ｓ Ｎ Ｍ Ｒ 谱表现为变蒙脱石的谱学特征加热到６５９‘ Ｃ 时，蒙脱石八面体片中的羟基开始脱失， 但层状结构仍然保持， 这种羟基的脱失过程对应着八面体片中 Ａｌ （ Ⅵ） 向 Ａｌ （ Ⅳ） 的转变温度达到９００‘ Ｃ 时， 与蒙脱石有关的 Ｓｉ 谱消失， 标志着其层状结构完全被破坏， 并有新的矿物相χ Ｓｉ Ｏ２ 产生１０００‘ Ｃ 时， 出现较多的χ Ｓｉ Ｏ２ ， 同时热产物的 Ａｌ 谱发生较大的变化当温度为１２００‘ Ｃ 时， 则出现方英石及莫来石相当热处理温度达到１３５０‘ Ｃ 时，方英石及莫来石的含量略有减少， 并出现较多的堇青石相更多还原

【Abstract】 The montmorillonite in Heping, Guangdong province was studied by chemical analysis, DTA, TG, XRD, IR, AFM and MAS NMR It is found that when the temperature is between 500～700  C, The Si and Al spectra of montmorillonite display the spectrum characteristic of meta montmorillonite When the thermal treatment temperature reaches 659  C, the hydroxyl in octahedra sheet begins dehydrating, but the layer structure is maintaining, this process is corresponding to Al( Ⅵ) turning to Al(Ⅳ) in octahedra sheet When the temperature reaches 900  C, the Si spectra relevant to montmorillonite disappear, that means the layer structure of montmorillonite is destroyed, and the new mineral phase χ SiO 2 is found When the temperature reaches 1000 c C, there is more χ SiO 2 phase produced by phase change, meanwhile the Al spectra of thermal products change greatly When the temperature reaches 1200  C, cristobalite and mullite phases appear When the temperature r eaches 1350  C, the cristobalite and mullite phases reduce a few, and more cordierite phases appear更多还原