Mineralogical Investigation of Calcium-Containing Al-Fe Hydrolysis Polymer ProductsⅡ: Study on Thermal Decomposition Behaviour <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

Mineralogical Investigation of Calcium-Containing Al-Fe Hydrolysis Polymer ProductsⅡ: Study on Thermal Decomposition Behaviour

详细信息

责任者：Jiang Hong (Department of Science and Technology ; Guizhou Radio and TV University ; Guizhou 550002 ; China) ; Zhang Xinhua
刊名：Acta Mineralogica Sinica
出版年：2009
卷期：29(3)
关键词：矿物合成 ; mineral synthesis
页码：p.380-386
图表：4 illus., 7 tables, 15 refs.
分类号：0700
issnNo：ISSN1000-4734
isbnNo：CN52-1045/P

摘要

Thermal decomposition behavior of polyaluminum ferric chloride (PAFCNa, PAFCCa), polyaluminum chloride (PACNa, PACCa), polyferric chloride (PFCNa, PFCCa), which were synthesized respectively with NaOH or Ca(OH)₂ as basicity dose, were studied by TG-DTG and DTA techniques. The TG analysis showed that the amount of coordinating water molecules in PAFCCa is higher than that in PAFCNa, and, there are mainly coordinating water and crystal water in PAFCCa. The results of TG-DTG analysis support that the XRD patterns display that Ca(Ⅱ) combined with Al(Ⅲ) and Fe(Ⅲ) and formed crystalline phase hydrogrossular [Ca₃Al₂(OH)₁₂]. It is double [Ca₃Al₂(OH)₁₂] structure. Two of the dehydration peaks (shoulder) at 125 or 180 ℃ on the DTG curve of PAFCCa may be one of the judge criteria that there is or no ettringite phase in PAFCCa.

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