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Citation: Hao Jinku, Shi Minyi, Fu Cuirong, Han Weitao. Ionic Conductivity of Sodium Zeolite A, X and Y with Different Exchanged Lanthanum Contents[J]. Chinese Journal of Applied Chemistry, ;1997, 14(6): 34-37. shu

Ionic Conductivity of Sodium Zeolite A, X and Y with Different Exchanged Lanthanum Contents

1.
Department of Chemistry, Tianjin Normal University, Tianjin 300074

Received Date: 3 February 1997
Available Online: 1 August 1997
Fund Project:

The phases and compositions of sodium zeolite A, X and Y before and after exchange with lanthanum ions were determined by X-ray, atomic absorbtion spectrometry, differential thermal gravimentric analysis and chemical analysis. The ionic conductivity was measured by alternating impedance spectrograph. The dominant mobile charge carrier in these system is hydrated Na⁺. The activation energies of sidium zeolite A, X and Y obtained from the relationship between conductivity and temperature are 54.9 kJ/mol, 38.8 kJ/mol and 49.6 kJ/mol respectively. Appropriately exchanged with lanthanum ions, the conductivity apparent activation energies of zeolite LaNaA, LaNaX and LaNaY can be decreased to 34.6 kJ/mol, 27.9 kJ/mol and 41.3 kJ/mol respectively. The effect of exchanged lanthanum contents on the migration of sodium ion of the zeolites has been discussed.
- NaA,
- NaX,
- NaY,
- zeolite,
- lanthanum ion exchange,
- AC conductivity,
- apparent activation energy
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