The electrical conductivity of anhydrous Linde zeolite types A, X, and Y in various cationic forms was measured between 20 and 400C. The conductivity was ohmic, essentially non-capacitive and appeared to be strictly ionic; with an unusually low activation energy (figure 6). From the effect of zeolite channel-size, type of cation and cation density upon ΔH, ΔG, and ΔS for the conduction process, conclusions were drawn as to the zeolite internal structure and surface energy.

Electrical Conductivity of Synthetic Crystalline Zeolites. D.C.Freeman, D.N.Stamires: Journal of Chemical Physics, 1961, 35[4], 799

Figure 6

Activation Energy for Ionic Conduction

 in Y Zeolites versus Cation Radius