Abstract
The dielectric behavior of polycrystalline pellets of 2-alkyl benzimidazoles are reported in this paper. The experimental technique consists of measuring the dielectric constant of a polycrystalline pellet as a function of temperature. Dielectric anomalies were found for which the position of the dielectric and loss-tangent peaks were independent of frequency, which showed a solid/solid first-order transition. When the sample dropped through the transition temperature, reversible charge storage showed poling of the sample, and therefore implies possible ferroelectric behavior. The experimental procedure was validated on thiourea, a known ferroelectric. 2-ethyl benzimidazole showed the same phenomena at a transition temperature of about −90 °C and is probably a new ferroelectric material.
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