Nonferroelectric ceramic of La2-xSrxNiO4 with colossal permittivity

Abstract

Nonferroelectric ceramic of La2-xSrxNiO4 with colossal permittivity

Yu.V. Kabirov, T.I.Chupakhina, V.G. Gavrilyachenko, T.G. Gavrilyachenko, E.I. Sitalo, E.V. Chebanova

Incoming article date: 22.12.2013

By self-propagating high-temperature synthesis (SHTS) prepared fine powder оf La2-xSrxNiO4 composition , which is used to obtain dense ceramics exhibiting the properties of n-type semiconductor. Prolonged annealing of the samples resulted in a decrease of the conductivity on the order of 3-4, and the changing nature of the dielectric spectrum: dielectric constant ε' has a stable value of 4·104 Hz in the range of 0,4 − 1·105 Hz .

Keywords: dielectric constant, phase separation, nikelate of strontium lanthanum, self-extending high-temperature synthesis