Abstract

LOPEZ-VERGARA, FERNANDA; GALDAMEZ, ANTONIO  and  MANRIQUEZ, VÍCTOR. ELECTRICAL BEHAVIOR OF A Cu₂Fe_0.4Co_0.6SnS₄ CERAMIC. J. Chil. Chem. Soc. [online]. 2013, vol.58, n.4, pp.2131-2135. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072013000400051.

The solid solutions Cu₂Fe_1-XCo_XSnS₄, with stannite-type structure are stable up to about 800°C. The electrical properties of the Cu₂Fe_0.4Co_0.6SnS₄ ceramic were investigated by complex impedance. The real and imaginary dielectric permittivity dependence with the temperature were measured between 10kHz and 1 MHz in temperature range 77-280K, finding that the ceramic present the characteristics behavior of a dielectric relaxation between 100 and 250 K, with a maximum at approximately 200 K. The electric permittivity found has orders of magnitude between 10² and 10³. A space charge polarization mechanism is suggested to explain the observed electric relaxation.

Keywords : Quaternary sulfides; dielectric relaxation; stannite.

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