The physicochemical characteristics of the commercial bentonite S-4205-02 (Bentovin), as well as its structural parameters, are given. Clay agglomerates were mainly up to 10…20 ?m in size. X-ray spectral analysis showed rather high content of Fe2O3, Na2O, CaO, which corresponded to the ferruginous-aluminum variety of montmorillonite with a predominance of Na+ and Ca2+ ions in the interlayer space. The presence of potassium indicates the illite presence. According to the X-ray phase analysis, the main component of the product was montmorillonite (MM) with impurities of quartz/cristobalite, kaolinite, illite, hematite. Thermal analysis curves and the infrared spectrum of bentonite were analyzed. The specific surface area was 58 ± 6 m2/g (BET). On the basis of this bentonite and orthophosphoric acid (OPA), a geopolymer bentonite phosphate binder has been for the first time synthesized. Using X-ray and IR spectral analysis, it was shown that when reacting aluminosilicate powder with OPA, the MM structure was completely destroyed with the formation of aluminum and silicon phosphates.
Natalia V. Filatova – Candidate of Chemical Sciences, Associate Professor, Department of Ceramics and Electrochemical materials, Ivanovo State University of Chemical Technology, Ivanovo, Russia
Nadezhda F. Kosenko – Doctor of Technical Sciences, Professor, Department of Ceramics and Electrochemical materials, Ivanovo State University of Chemical Technology, Ivanovo, Russia
Mikhail F. Butman – Doctor of Physico-mathematical Sciences, Professor, Department of Ceramics and Electrochemical materials, Ivanovo State University of Chemical Technology, Ivanovo, Russia
Maria S. Maloivan – postgraduate, Department of Ceramics and Electrochemical materials, Ivanovo State University of Chemical Technology, Ivanovo, Russia
Albina V. Kolobkova – postgraduate, Department of Ceramics and Electrochemical materials, Ivanovo State University of Chemical Technology, Ivanovo, Russia
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