Role of vermiculite and zirconium–vermiculite on the formation of zircon–cordierite nanocomposites
作者： M. Valášková , J. Tokarský , M. Hundáková , J. Zdrálková , B. Smetana
DOI: 10.1016/J.CLAY.2013.02.015
关键词:
摘要: Abstract The Zr 4 + –vermiculites were studied in their new role of the zircon precursor clay minerals mixtures which prepared for firing zircon–cordierite nanocomposites. Currently there is a lack data available about structure –vermiculites, on this study was performed. modeling arrangement interlayer material –vermiculite led to findings that water molecules are attracted more strongly by Mg 2 + cations than Zr-tetrameric cations, and both tetrameric [Zr 4 (OH) 14 (H 2 O) 10 ] 8 16 8 + may be present space –vermiculites. Vermiculites from two different localities Czech Republic (Verm1) Brazil (Verm2) intercalated using zirconyl chloride (ZrOCl –30% solution HCl) designated as –Verm1 –Verm2, respectively. Influence –Verm2 properties nanocomposites investigated comparison with nanocomposites, saturation containing Verm1 Verm2 HCl). fired mineral showed maximum porosity P = 58 60%, skeletal density SD = 3.2 3.6, smallest pores median diameter MDP = 18 15 μm, respectively, saturated solution. type vermiculite or did not affect contents crystalline phases cordierite
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