2005
DOI: 10.1111/j.1551-2916.2005.00689.x
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Wollastonite from Hydrothermally Synthesized Calcium Hydrometasilicate Obtained from Various Modifications of Silica

Abstract: A hydrothermally CaO–SiO2–H2O system was investigated at 150°–200°C, 2.5 h (CaO:SiO2=0.95) using various modifications of SiO2 in the presence of a mineralizer. Synthetic (stabilized) γ‐tridymite is the most reactive among SiO2 modifications. In the reaction mixture, the optimal concentration of the mineralizer (KOH) is 2% (versus the solid phase). The binding degree of CaO with SiO2 practically is 100% at 150°C. It is impossible to synthesize CSH free of C2SH on the basis of β‐cristobalite and β‐quartz under … Show more

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“…As far as synthesis of wollastonite is concerned, experimental procedures refer to the phase reaction method (Kurczyk and Wuhrer, 1971; Kridelbaugh, 1973; Kurczyk, 1977; Kotsis and Balogh, 1989; Ibañez et al , 1990; Grigoryan et al , 2010), the hydrothermal process (Glasser and Taylor, 1978; Grigoryan et al , 2006, 2008, 2010), the glass ceramic method (Philip and Binet, 1971), the sol-gel method (Villegas and Fernandez Navarro, 1988); the molten salts technique (Trubnikov et al , 1989); the microwave method (Vichaphund et al , 2011) and the hydrothermal microemulsion method (Lin et al , 2006).…”
Section: Introductionmentioning
confidence: 99%
“…As far as synthesis of wollastonite is concerned, experimental procedures refer to the phase reaction method (Kurczyk and Wuhrer, 1971; Kridelbaugh, 1973; Kurczyk, 1977; Kotsis and Balogh, 1989; Ibañez et al , 1990; Grigoryan et al , 2010), the hydrothermal process (Glasser and Taylor, 1978; Grigoryan et al , 2006, 2008, 2010), the glass ceramic method (Philip and Binet, 1971), the sol-gel method (Villegas and Fernandez Navarro, 1988); the molten salts technique (Trubnikov et al , 1989); the microwave method (Vichaphund et al , 2011) and the hydrothermal microemulsion method (Lin et al , 2006).…”
Section: Introductionmentioning
confidence: 99%