skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Synthesis of monocrystalline Ca{sub 3}SiO{sub 5} using the optical floating zone method

Abstract

Alite (Ca{sub 3}SiO{sub 5}/C{sub 3}S with low concentrations of foreign ions) is the main constituent of Ordinary Portland Cement. Normally it forms during sintering but with quite low crystal sizes (ca. 30 μm). For experiments on alite hydration behavior monocrystalline grains are required. Due to its incongruent melting behavior and its thermodynamic instability below 1250 °C it is very challenging to obtain large alite single crystals. In the present study, the floating zone method was used for annealing polycrystalline rods of monoclinic and triclinic C{sub 3}S just below the melting point of the phase. Large monocrystalline grains (> 500 μm) of the monoclinic (Al, Mg-doped) and triclinic polymorphs could successfully be obtained. Monocrystallinity was demonstrated by electron backscatter diffraction (EBSD). The chemical composition regarding incorporation of foreign ions and thus the resulting crystallographic modification of the C{sub 3}S can easily be adjusted. Chemical homogeneity of the synthesized monocrystalline grains was proven by electron probe microanalysis (EPMA).

Authors:
 [1]; ;  [1];  [2];  [1]
  1. University of Erlangen-Nuernberg (FAU), GeoZentrum Nordbayern, Mineralogy, Schlossgarten 5a, 91054 Erlangen (Germany)
  2. Bauhaus University Weimar, Coudraystraße 11, 99423 Weimar (Germany)
Publication Date:
OSTI Identifier:
22696565
Resource Type:
Journal Article
Journal Name:
Cement and Concrete Research
Additional Journal Information:
Journal Volume: 85; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0008-8846
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; BACKSCATTERING; CHEMICAL COMPOSITION; CRYSTALLIZATION; ELECTRON DIFFRACTION; ELECTRON MICROPROBE ANALYSIS; ELECTRON PROBES; HYDRATION; IONS; MELTING; MELTING POINTS; MONOCLINIC LATTICES; MONOCRYSTALS; POLYCRYSTALS; PORTLAND CEMENT; SINTERING; SYNTHESIS; ZONES

Citation Formats

Naber, C., E-mail: christoph.naber@fau.de, Goetz-Neunhoeffer, F., Göbbels, M., Rößler, C., and Neubauer, J., E-mail: juergen.neubauer@fau.de. Synthesis of monocrystalline Ca{sub 3}SiO{sub 5} using the optical floating zone method. United States: N. p., 2016. Web. doi:10.1016/J.CEMCONRES.2016.04.008.
Naber, C., E-mail: christoph.naber@fau.de, Goetz-Neunhoeffer, F., Göbbels, M., Rößler, C., & Neubauer, J., E-mail: juergen.neubauer@fau.de. Synthesis of monocrystalline Ca{sub 3}SiO{sub 5} using the optical floating zone method. United States. doi:10.1016/J.CEMCONRES.2016.04.008.
Naber, C., E-mail: christoph.naber@fau.de, Goetz-Neunhoeffer, F., Göbbels, M., Rößler, C., and Neubauer, J., E-mail: juergen.neubauer@fau.de. Fri . "Synthesis of monocrystalline Ca{sub 3}SiO{sub 5} using the optical floating zone method". United States. doi:10.1016/J.CEMCONRES.2016.04.008.
@article{osti_22696565,
title = {Synthesis of monocrystalline Ca{sub 3}SiO{sub 5} using the optical floating zone method},
author = {Naber, C., E-mail: christoph.naber@fau.de and Goetz-Neunhoeffer, F. and Göbbels, M. and Rößler, C. and Neubauer, J., E-mail: juergen.neubauer@fau.de},
abstractNote = {Alite (Ca{sub 3}SiO{sub 5}/C{sub 3}S with low concentrations of foreign ions) is the main constituent of Ordinary Portland Cement. Normally it forms during sintering but with quite low crystal sizes (ca. 30 μm). For experiments on alite hydration behavior monocrystalline grains are required. Due to its incongruent melting behavior and its thermodynamic instability below 1250 °C it is very challenging to obtain large alite single crystals. In the present study, the floating zone method was used for annealing polycrystalline rods of monoclinic and triclinic C{sub 3}S just below the melting point of the phase. Large monocrystalline grains (> 500 μm) of the monoclinic (Al, Mg-doped) and triclinic polymorphs could successfully be obtained. Monocrystallinity was demonstrated by electron backscatter diffraction (EBSD). The chemical composition regarding incorporation of foreign ions and thus the resulting crystallographic modification of the C{sub 3}S can easily be adjusted. Chemical homogeneity of the synthesized monocrystalline grains was proven by electron probe microanalysis (EPMA).},
doi = {10.1016/J.CEMCONRES.2016.04.008},
journal = {Cement and Concrete Research},
issn = {0008-8846},
number = ,
volume = 85,
place = {United States},
year = {2016},
month = {7}
}