Volume 18 Issue 1
Feb.  2011
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Sakonwan Hanjitsuwan, Prinya Chindaprasirt, and Kedsarin Pimraksa, Electrical conductivity and dielectric property of fly ash geopolymer pastes, Int. J. Miner. Metall. Mater., 18(2011), No. 1, pp.94-99. https://dx.doi.org/10.1007/s12613-011-0406-0
Cite this article as: Sakonwan Hanjitsuwan, Prinya Chindaprasirt, and Kedsarin Pimraksa, Electrical conductivity and dielectric property of fly ash geopolymer pastes, Int. J. Miner. Metall. Mater., 18(2011), No. 1, pp.94-99. https://dx.doi.org/10.1007/s12613-011-0406-0

Electrical conductivity and dielectric property of fly ash geopolymer pastes

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This work was supported by the Thailand Research Fund through the Royal Golden Jubilee Ph.D. Program (No.PHD/0359/2550).

  • The electrical conductivity and dielectric property of fly ash geopolymer pastes in a frequency range of 100 Hz-10 MHz were studied. The effects of the liquid alkali solution to ash ratios (L/A) were analyzed. The mineralogical compositions and microstructures of fly ash geopolymer materials were also investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The 10 mol sodium hydroxide solution and sodium silicate solution at a sodium silicate-to-sodium hydroxide ratio of 1.0 were used in making geopolymer pastes. The pastes were cured at 40℃. It is found that the electrical conductivity and dielectric constant are dependent on the frequency range and L/A ratios. The conductivity increases but the dielectric constant decreases with increasing frequency.

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