ACTA

Effect of Tantalum Substitution on Dielectric Constant of ZnSb_2-xTa_xO₆ Solid Solution (x=0.0,0.1,0.25,0.75,1.6)

B. Sawicki^a, G. Dąbrowska^b, E. Filipek^b, T. Groń^a, H. Duda^a, S. Pawlus^a, P. Urbanowicz^a
^aInstitute of Physics, University of Silesia, Katowice, Poland
^bFaculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Poland

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The electrical measurements of ZnSb_2-xTa_xO₆ phases with x=0.0,0.1,0.25,0.75,1.6 have revealed insulating behavior with strongly decreasing electrical conductivity when tantalum x content is increased. As a consequence, high values of relative permittivity ε_r and loss tangent tan(δ) were observed, that decreased with increase of temperature and frequencies, for samples with low Ta content, below x=0.75. In turn, for samples richer in tantalum, ε_r reaches 14, and tan(δ) becomes as low as 0.02 for x=1.6. These effects have been interpreted either by the framework of the relaxation processes, or by the spatial charge polarization leading to the low energy loss of materials.

DOI:10.12693/APhysPolA.136.633
PACS numbers: PACS numbers: 72.80.Sk, 77.22.-d, 77.22.Gm