2022   01   en   p.33-36 A.R. Imamaliyev, G.F. Ganizade,
Size effect of submicron barium titanate particles on their dielectric properties


The dielectric properties of a heterogeneous system consisting of submicron barium titanate particles of different sizes and oleic acid were studied. On the basis of these results the dielectric permittivity and electrical conductivity of the particles for each size were determined. The dielectric permittivity of 100 nm size particles has the lowest value, which is explained by the absence of ferroelectricity at these sizes. Particles with a size of 200 nm, on the other hand, have an explicitly high value of dielectric permittivity, indicating their monodomain structure. The electrical conductivity of barium titanate particles increases with their size. Qualitative explanations of the obtained results are given.

Keywords: ferroelectrics, barium titanate, dielectric permittivity, dielectric relaxation, conductivity.
PACS: 51.70.+; 52.25Mg, 77.22Gm, 77.84.-s

Received: 01.02.2022


lnstitute of Physics of Azerbaijan National Academy of Sciences, H.Javid av.13I, Baku, AZ1143, Azerbaijan
E-mail: Rahimoglu @mail.ru

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