Abstract

GIRALDO OSORIO, Óscar Hernán; ARIAS DUQUE, Nayda Patricia  and  AGUIRRE CORTES, Jhon Mauricio. Dielectric properties of Mg:Al layered double hydroxides. Rev. Soc. Quím. Perú [online]. 2015, vol.81, n.3, pp.224-231. ISSN 1810-634X.

This work describes the synthesis and characterization of Mg₂Al-NO₃ layered double hydroxides nanomaterial prepared using a coprecipitation method. The electrical behavior of this material was evaluated using dielectric spectroscopy. The results from X-ray diffraction analysis showed the formation of lamellar structure, while the atomic absorption and infrared spectroscopy confirms the presence of all species inthe structure of the synthesized material. TEM shows clusters of plate-like particles and the dielectric spectroscopy results at room temperature show an orientational polarization behavior that suggests the rotation of water molecules at high frequency. TEM results also demonstrate the rotation of nitrate anions in the interlayer spacing at low frequency, which may be responsible for producing anionic conductivity.

Keywords : Layered double hydroxides; dielectric properties; ionic conductivity.

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