A Review on the Kaolinite-Mullite Transformation
A Review on the Kaolinite-Mullite Transformation
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DOI：
10.1080/0371750x.1977.10840646
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发表时间：
1977
影响因子：
1.2
通讯作者：
S. Chaudhuri
中科院分区：
文献类型：
--
作者：
S. Chaudhuri
综述了高岭石向莫来石转化的研究进展。在转变过程中观察到的热效应和伴随这些效应的阶段进行了讨论，在现有的概念。通过化学、热学、X射线、电子光学、红外、取向和晶体学等方面的证据，揭示了中间相的性质，并确定了转变反应的过程。强有力的证据表明，Al-Si尖晶石和γ-Al_2O_3是莫来石形成的前驱体。γ-Al_2O_3相的形成在最近的IR、R.E.D.和X射线荧光研究，而铝硅尖晶石相的形成是必要的，以保持结构的连续性相从高岭石莫来石的单晶X射线研究所示。转换遵循以下顺序：
The transformation of kaolinite to mullite is reviewed. The thermal effects observed during the transformation and the phases which accompany these effects are discussed in the light of the existing concepts. The chemical, thermal, X-ray, electron-optical, infrared, orientational and crystallographic evidences are advanced to reveal the nature of the intermediate phases and to establish the course of the transformation reaction. Strong evidences exist in favour of Al-Si spinel and γ-Al2O3 as the precursor of mullite formation. The formation of γ-Al2O3 phase finds support in the recent ir, r.e.d. and X-ray fluorescence studies whereas the formation of Al-Si spinel phase is necessary to maintain the structural continuity of the phases from kaolinite to mullite as shown by the single crystal X-ray studies. The transformation follows the sequence: