Abstract
The preparation of calcium sulfate by flame synthesis resulted in the continuous production of anhydrite nanoparticles of 20–50 nm size. After compaction and hardening by the addition of water, the anhydrite nanoparticles reacted to nano-gypsum which was confirmed by X-ray diffraction, diffuse reflectance IR spectroscopy and thermal analysis. Mechanical properties were investigated in terms of Vickers hardness and revealed an up to three times higher hardness of nano-gypsum if compared to conventional micron-sized construction material. The improved mechanical properties of nano-gypsum could in part be due to the presence of calcium sulfate nano-needles in the nano-gypsum as showed by electron microscopy.
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Arabi-Katbi O.I., Pratsinis S.E., Morrison P.W. (2002). In situ infrared measurements on TiO2 flames: Gas and particle concentrations. AIChE J. 48(1):59–68
Arikan M., Sobolev K. (2002). The optimization of gypsum-based composite material. Cem. Concr. Res. 32:1725–1728
Bushuew N., Maselnnikow B.M., Borisov V.M. (1983). Phase transformations in the dehydration of CaSO4 2· H2O. Russ. J. Inorg. Chem. 28:1404
Coquard P., Boistelle R., Amathieu L., Barriac P. (1994). Hardness, elasticity modulus and flexion strength of dry set plaster. J. Mater. Sci. 29:4611–4617
Gleiter H. (1989). Nanocrystalline materials. Progr. Mater. Sci. 33(4):223–315
Grass R.N., Stark W.J. (2005). Flame synthesis of calcium-, strontium-, barium fluoride nanoparticles and sodium chloride. Chem. Commun. 14:1767–1769
Grass R.N., Tsantillis S., Pratsinis S.E. (2006). Design of high-temperature, gas-phase synthesis of hard or soft TiO2 agglomerates. AIChE J. 52:1318–1325
Hajjouji A.E., Murat M. (1987). Strength development and hydrate formation rate, investigation on anhydrite binders. Cem. Concr. Res. 17:814–822
Hand R.J. (1997). Calcium sulphate hydrates: A review. Br. Ceram. Trans. 96(3):116–120
Harris P.E., Hoyer S., Lindquist T.J., Stanford C.M. (2004). Alterations of surface hardness with gypsum die hardeners. J. Prost. Dent. 92(July):35–38
Huber M., W.J. Stark, S. Loher, M. Maciejewski, F. Krumeich & A. Baiker, 2005. Flame synthesis of calcium carbonate nanoparticles. Chem. Commun. 648–650
Johannessen T., Jenson J.R., Mosleh M., Johansen J., Quaade U., Livbjerg H. (2004). Flame synthesis of nanoparticles – Applications in catalysis and product/process engineering. Chem. Eng. Res. & Design. 82(A11):1444–1452
Karni J., Karni E. (1995). Gypsum in construction: Origin and properties. Mater. Struct. 28:92–100
Kuang D.B., Xu A.W., Fang Y.P., Ou H.D., Liu H.Q. (2002). Preparation of inorganic salts (CaCO3, BaCO3, CaSO4) nanowires in the Triton X-100/cyclohexane/water reverse micelles. J. Crys. Growth. 244(3–4):379–383
Kumareson P., Devanarayanan S. (1992). Gypsum crystals grown in silica gel in the presence of citric acid as additive: A study on microhardness. J. Mater. Sci. Lett. 11:150–151
Luebke R.J., Chan K.C. (1985). Effect of microwave oven drying on surface hardness of dental gypsum products. J. Prosthet. Dent. 54(3):431–435
Madler L., Kammler H.K., Mueller R., Pratsinis S.E. (2002a). Controlled synthesis of nanostructured particles by flame spray pyrolysis. J. Aerosol Sci. 33(2):369–389
Madler L., Stark W.J., Pratsinis S.E. (2002b). Flame-made ceria nanoparticles. J. Mater. Res. 17(6):1356–1362
Melo L.G.N., Nagata M.J.H., Bosco A.F., Ribeiro L.L.G., Leite C.M. (2005). Bone healing in surgically created defects treated with either bioactive glass particles, a calcium sulfate barrier, or a combination of both materials. Clin. Oral Impl. Res. 16:683–691
Meyers M.A., Mishra A., Benson D.J. (2006). Mechanical properties of nanocrystalline materials. Progr. Mater. Sci. 51(4):427–556
Olsen D.W., 2004. Mineral Commodity Summaries. U.S. Geological Survey, pp. 76–77
Papageorgiou A., Tzouvalas G., Tsimas S. (2005). Use of inorganic setting retarders in cement industry. Cem. Concr. Res. 27:183–189
Peters C.P., Hines J.L., Bachus K.N., Craig M.A., Bloebaum R.D. (2005). Biological effects of calcium sulfate as bone graft substitute in ovine metaphyseal defects. J. Biomed. Mater. Res. A. 76A(3):456–462
Rees G.D., Evans-Gowing R., Hammond S.J., Robinson B.H. (1999). Formation and morphology of calcium sulfate nanoparticles and nanowires in water-in-oil microemulsions. Langmuir 15(6):1993–2002
Sandler S.I. (1999). Chemical and Engineering Thermodynamics. John Wiley & Sons, New York
Sievert T., Wolter W., Singh N.B. (2005). Hydration of anhydrite of gypsum (CaSO4.II) in a ball mill. Cem. Concr. Res. 35:623–630
Song X.Y., Sun S.X., Fan W.L., Yu H.Y. (2003). Preparation of different morphologies of calcium sulfate in organic media. J. Mater. Chem. 13(7):1817–1821
Stark W.J., Baiker A., Pratsinis S.E. (2002). Nanoparticle opportunities: Pilot-scale flame synthesis of vanadia/titania catalysts. Part. Part. Syst. Char. 19(5):306–311
Stark W.J., L. Mädler & S.E. Pratsinis, 2004. Metal oxides prepared by flame pyrolysis, WO2004/005184 2004
Stark W.J., Pratsinis S.E. (2002). Aerosol flame reactors for manufacture of nanoparticles. Powder Technol. 126(2):103–108
Stark W.J., Wegner K., Pratsinis S.E., Baiker A. (2001). Flame aerosol synthesis of vanadia–titania nanoparticles: Structural and catalytic properties in the selective catalytic reduction of NO by NH3. J. Catal. 197(1):182–191
Xu C.H. (2005). Research and application of ceramic die materials. Rare Metal Mater. Eng. 34:262–265
Zhan G.D., Mukherjee A.K. (2005). Processing and characterization of nanoceramic composites with interesting structural and functional properties. Rev. Adv. Mater. Sci. 10(3):185–196
Acknowledgments
This work was financed by the ETH Zurich. The authors would like to thank Dr. F. Krumeich for transmission electron microscopy and Prof. L. J. Gaukler for SEM measuring time.
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Osterwalder, N., Loher, S., Grass, R.N. et al. Preparation of nano-gypsum from anhydrite nanoparticles: Strongly increased Vickers hardness and formation of calcium sulfate nano-needles. J Nanopart Res 9, 275–281 (2007). https://doi.org/10.1007/s11051-006-9149-7
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DOI: https://doi.org/10.1007/s11051-006-9149-7