Determination of Moisture Content in Synthetic Moulding Sand on the Grounds of Relative Permittivity Measurement

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The presented research was aimed at searching for an exact and effective method of determining moisture content in traditional moulding sands. By measuring resonance frequency and quality factor of a waveguide resonance cavity, relative permittivity was determined for different synthetic moulding sands. Analysis of the presented results confirms a linear relation between relative permittivity values and moisture content values in the selected traditional moulding sands. The obtained linear relationship can be used as a reference characteristic for evaluation of humidity of moulding sand.

[1] S.M. Dobosz, Water in moulding and core sands, 2006 Publishing House Akapit, Kraków.

[2] L. Lewandowski, Materials for casting moulds, 1997 Publishing House Akapit, Kraków.

[3] J. Wang, T. Schmugge, D. Williams, Dielectric constants of soils at microwave frequencies-II, National Aeronautics and Space Administration, NASA Tech. Pap. 1238, May 1978.

[4] J.E. Hipp, Soil electromagnetic parameters as a function of frequency, soil density and soil moisture, Proc. IEEE, 62, 98-103 (1974).

[5] G.P. de Loor, Dielectric properties of heterogeneous mixtures containing water, J. Microwave Power 3, 67-73 (1968).

[6] C. Liu, L. Zhang, J. Peng, C. Srinivasakannan, B. Liu, H. Xia, J. Zhou, L. Xu, Temperature and moisture dependence of the dielectric properties of silica sand, J. Microwave Power Ee. 47 (3), 199-209 (2013).

[7] X. Shang, J. Chen, W. Zhang, J. Peng, H. Chen, S. Guo, G. Chen, Dimension Optimization for Silica Sand Based on the Analysis of Dynamic Absorption Efficiency in Microwave, Dry. Technol. 32, 1608-1613 (2014).

[8] L.M. Dudley, S. Bialkowski, D. Or, C. Junkermeier, Low frequency impedance behavior of montmorillonite suspensions, Soil Sci. Soc. Amer. J. 67 (2), 518-526 (2003).

[9] A. Revil, Effective conductivity and permittivity of unsaturated porous materials in the frequency range 1 mHz–1 GHz, Water Resources Res. 49 (1), 306-327 (2013).

[10] T.C. Baum, K. Ghorbani, Measurements on the Effects of Moisture on the Complex Permittivity of High Temperature Ash, Microwave Theory and Techniques IEEE Transactionson 64, 607-615 (2016).

[11] P.W. Rosenkranz, A model for the complex dielectric constant of supercooled liquid water at microwave frequencies, IEEE Trans. Geosci. Remote Sens. 53 (3), 1387-1393 (2015).

[12] R. Drożdzak, K. Twardowski, Permittivity of porous media – factors affecting its variability, Drilling Oil Gas 27, 1-2 (2010).

[13] M. Lisowski, Measurements of resistivity and permittivity of solid dielectrics, 2004 Publishing House of Wrocław University of Technology, Wrocław.

[14] M. Holtzer, A. Bobrowski, B. Grabowska, Montmorillonite: a comparison of methods for its determination in foundry bentonites, Metalurgija 50 (2), 119-122 (2011).

[15] D. Nowak, K. Granat, B. Opyd, Examination and analysis of influence of compaction degree on dielectric properties of moulding sand components, Metalurgija 54 (2), 353-356 (2015).

[16] K. Granat, B. Opyd, D. Nowak, M. Stachowicz, G. Jaworski, Usefulness of foundry tooling materials in microwave heating process, Arch. Metall. Mater. 58 (3), 919-922 (2013).

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

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