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An investigation of the electrical conductivity and ultrasonic properties of the KHCO3 compound

The total conductivity of the KHCO3 compound is studied in the frequency range 50 Hz–1 MHz and in the temperature range 300–370 K. The frequency dependence of the electrical conductivity is divided into three regions; the first one in the low-frequency range (dc conductivity), and the others in the moderate and relatively higher frequency ranges. In general, the conductivity–frequency relation was found to obey a double power law relation, σtot=σdc+Aωp+Bωq. The powers p and q have been found to be in the range 0–1 and 1–2, respectively, and the results were interperted in terms of the quantum mechanical tunneling model. The attenuation coefficient (β) of the KHCO3 compound was studied over a temperature range from room temperature to 370 K. The general behavior showed two essential activated regions. The activation energies due to both the dc conductivity and the attenuation coefficient are estimated and discussed.