Article ID Journal Published Year Pages File Type
1298939 Solid State Ionics 2006 4 Pages PDF
Abstract

The dispersion curves of the dielectric response of NH4HSO4 show that the corrected imaginary part of permittivity, εʺ, and its real part ε′ versus frequency reveal a dielectric relaxation around 9.1 × 105 Hz at 31 °C, which shifts to higher frequencies (∼ 106 Hz) as the temperatures increases. The relaxation frequency shows an activated relaxation process over the temperature range 31–83 °C with activation energy Ea = 0.14 eV, which is close to that derived from the dc conductivity. We suggest that the observed dielectric relaxation could be produced by the H+ jump and SO4− reorientation that cause distortion and change the local lattice polarizability inducing dipoles like HSO4−.

Related Topics
Physical Sciences and Engineering Chemistry Electrochemistry
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