Abstract
The effects of contents of AlF3 and Al2O3, and temperature on electrical conductivity of (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 were studied by continuously varying cell constant (CVCC) technique. The results show that the conductivities of melts increase with the increase of temperature, but by different extents. Every increasing 10 °C results in an increase of 1.85×10−2, 1.86×10−2, 1.89×10−2 and 2.20×10−2 S/cm in conductivity for the (Na3AlF6-40%K3AlF6)-AlF3 melts containing 0%, 20%, 24%, and 30% AlF3, respectively. An increase of every 10 °C in temperature results an increase about 1.89×10−2, 1.94×10−2, 1.95×10−2, 1.99×10−2 and 2.10×10−2 S/cm for (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts containing 0%, 1%, 2%, 3% and 4% Al2O3, respectively. The activation energy of conductance was calculated based on Arrhenius equation. Every increasing 1% of AlF3 results in a decrease of 0.019 and 0.020 S/cm in conductivity for (Na3AlF6-40%K3AlF6)-AlF3 melts at 900 and 1 000 °C, respectively. Every increase of 1% Al2O3 results in a decrease of 0.07 S/cm in conductivity for (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts. The activation energy of conductance increases with the increase in content of AlF3 and Al2O3.
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Foundation item: Project(2005CB623703) supported by the Major State Basic Research and Development Program of China; Project(2008AA030503) supported by the National High-Tech Research and Development Program of China; Project(GUIKEJI 0639032) supported by Applied Basic Research in Guangxi Province, China
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Huang, Yg., Lai, Yq., Tian, Zl. et al. Electrical conductivity of (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts. J. Cent. South Univ. Technol. 15, 819–823 (2008). https://doi.org/10.1007/s11771-008-0151-3
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DOI: https://doi.org/10.1007/s11771-008-0151-3