Fei Liu, Xiao-dan Wang, and Jian-xin Cao, Effect of Na+ on xonotlite crystals in hydrothermal synthesis, Int. J. Miner. Metall. Mater., 20(2013), No. 1, pp. 88-93. https://doi.org/10.1007/s12613-013-0698-3
Cite this article as:
Fei Liu, Xiao-dan Wang, and Jian-xin Cao, Effect of Na+ on xonotlite crystals in hydrothermal synthesis, Int. J. Miner. Metall. Mater., 20(2013), No. 1, pp. 88-93. https://doi.org/10.1007/s12613-013-0698-3
Fei Liu, Xiao-dan Wang, and Jian-xin Cao, Effect of Na+ on xonotlite crystals in hydrothermal synthesis, Int. J. Miner. Metall. Mater., 20(2013), No. 1, pp. 88-93. https://doi.org/10.1007/s12613-013-0698-3
Citation:
Fei Liu, Xiao-dan Wang, and Jian-xin Cao, Effect of Na+ on xonotlite crystals in hydrothermal synthesis, Int. J. Miner. Metall. Mater., 20(2013), No. 1, pp. 88-93. https://doi.org/10.1007/s12613-013-0698-3
The effect of Na+ ion concentration on the crystalline phase composition and morphology of xonotlite crystals prepared in a CaO-SiO2-H2O system via hydrothermal synthesis was analyzed. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results indicate that Na+ ion concentration has a significant impact on the composition and morphology of crystalline phases in the products under the initial conditions of a molar ratio of CaO/SiO2 of 1.0 and a reactant concentration of 0.05 mol·L−1 at 225℃ for 15 h. The main crystalline phase in the products has a phase transition from xonotlite to pectolite, and the morphology changes from fibrous to broomlike shape with the Na+ ion concentration increasing. Therefore, the content of Na2O in the raw material should be less than 5wt% for preparing pure xonotlite crystals via hydrothermal synthesis in a CaO-SiO2-H2O system.
The effect of Na+ ion concentration on the crystalline phase composition and morphology of xonotlite crystals prepared in a CaO-SiO2-H2O system via hydrothermal synthesis was analyzed. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results indicate that Na+ ion concentration has a significant impact on the composition and morphology of crystalline phases in the products under the initial conditions of a molar ratio of CaO/SiO2 of 1.0 and a reactant concentration of 0.05 mol·L−1 at 225℃ for 15 h. The main crystalline phase in the products has a phase transition from xonotlite to pectolite, and the morphology changes from fibrous to broomlike shape with the Na+ ion concentration increasing. Therefore, the content of Na2O in the raw material should be less than 5wt% for preparing pure xonotlite crystals via hydrothermal synthesis in a CaO-SiO2-H2O system.
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