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Synthesis of sodium-type fluorophlogopite mica from perlite and diatomite
Phongsak Laoot,Kunwadee Rangsriwatananon,Aphiruk Chaisena 한양대학교 세라믹연구소 2011 Journal of Ceramic Processing Research Vol.12 No.3
Sodium-type fluorophlogopite mica was synthesized by a new and simple method (all-in-one) that consists of mixing diatomite,MgO and NaF, grinding, firing and washing. The solid products were characterized by powder X-ray diffraction (XRD),Fourier transform infrared spectrometry (FT-IR) and scanning electron microscopy (SEM). The results showed that a major phase with lattice spacings of the fluorophlogopite mica (NaMg3AlSi3O10F2) formed was observed at d = 9.73 and d = 3.24 Åfor a single sheet of an interlayer with an anhydrous phase obtained at 1000-1100 oC for 48-72 h. The peak intensity of the sodium-type fluorophlogopite mica became stronger with increasing temperature and time.
Preparation of zeolite N from metakaolinite by hydrothermal method
Paiboon Sengyang,Kunwadee Rangsriwatananon,Aphiruk Chaisena 한양대학교 세라믹연구소 2015 Journal of Ceramic Processing Research Vol.16 No.1
Zeolite N was successfully prepared from activated Narathiwat kaolinite. Kaolinite activation was performed by the thermal treatment at 700 o C for 5 h. The thermally activated, amorphous kaolinite (metakaolinite) was treated hydrothermally with KOH, KCl, and H2O at 80, 90, 110, 130, 150, and 175 o C during different reaction times ranging from 2 h to 24 h. The synthesis products were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy in order to elucidate their physicochemical and characteristics. The results show that zeolite N was obtained with high crystalline when the K2O/Al2O3, KCl/Al2O3, and H2O/Al2O3 molar ratios were 2.3, 3.5, and 48.0 by hydrothermal treatment at 175 o C for 24 h. The cation exchange capacity of zeolite N was 590 meq 100 g−1 . Thus, the kaolinite can be used as a source of silica and alumina for the synthesis of zeolite N.