Journal of Siberian Federal University. Mathematics & Physics / Impedance Characteristics and Phase-dependent Conductivity of ZrO2x Nanopowders Produced by Vacuum-arc Synthesis

Full text (.pdf)
Issue
Journal of Siberian Federal University. Mathematics & Physics. Prepublication
Authors
Karpov, Igor V.; Fedorov, Leonid Yu.; Slyusareva, Evgeniya A.; Pavlov, Alexander V.; Lyamkin, Alexey I.; Zhilkashinova, Almira M.
Contact information
Karpov, Igor V. : Siberian Federal University Krasnoyarsk, Russian Federation; Federal Research Center Krasnoyarsk Scientific Center of the SB RAS Krasnoyarsk, Russian Federation; OCRID: 0000-0001-6951-8025; Fedorov, Igor V. : Siberian Federal University Krasnoyarsk, Russian Federation; Federal Research Center Krasnoyarsk Scientific Center of the SB RAS Krasnoyarsk, Russian Federation; OCRID: 0000-0001-6951-8025; Slyusareva, Evgeniya A. : Siberian Federal University Krasnoyarsk, Russian Federation; OCRID: 0000-0002-9124-3643; Pavlov, Alexander V. : Siberian Federal University Krasnoyarsk, Russian Federation; Federal Research Center Krasnoyarsk Scientific Center of the SB RAS Krasnoyarsk, Russian Federation; Lyamkin, Alexey I. : Siberian Federal University Krasnoyarsk, Russian Federation; Federal Research Center Krasnoyarsk Scientific Center of the SB RAS Krasnoyarsk, Russian Federation; OCRID: 0000-0001-8959-6856; Zhilkashinova, Almira M. : D. Serikbayev East Kazakhstan Technical University Ust-Kamenogorsk, The Republic of Kazakhstan; OCRID: 0000-0002-1209-7335
Keywords
zirconium oxide; vacuum arc; physical vapor deposition; phase stability
Abstract

The paper presents the results of studying the dielectric characteristics of unstabilized zirconium dioxide nanopowder (ZrO2−x) obtained by vacuum-arc deposition at different pressures of argon-oxygen plasma. A comprehensive analysis of the phase composition, morphology, photolumines- cent properties and impedance characteristics of three samples differing in the content of tetragonal, monoclinic and suboxide phases is carried out. It is found that the electrical response of the materials is determined by the interaction of the bulk conductivity of the tetragonal matrix, the barrier effects of grain boundaries (especially in the presence of m-ZrO2) and the shunting effect of the conducting phase Zr3O. The sample with the lowest content of the tetragonal phase exhibits minimal impedance, while the most heterophase composition is characterized by pronounced interphase polarization and high dielectric losses

Pages
35–49
EDN
AHCYRE
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/157937