Effect of BiScO3 Additive on the Structure and Electrical Properties of the Y2O3-ZrO2-SrTiO3 System

Authors I.V. Sudzhanskaya1 , M.N. Yaprintsev1 , Yu.S. Nekrasova2, V.M. Beresnev3 , A.N. Vasilev1

1Belgorod National Research University, 85, Pobeda Str., 308015, Belgorod Russia

2Belgorod State Technological University named after V.G. Shukhov, 46, Kostyukov Str, 308012 Belgorod, Russia

3Karazin Kharkiv National University, 2, Svoboda Sq, 61000 Kharkov, Ukraine

Issue Volume 11, Year 2019, Number 1
Dates Received 26 December 2018; revised manuscript received 08 February 2019; published online 25 February 2019
Citation I.V. Sudzhanskaya, M.N. Yaprintsev, Yu.S. Nekrasova, et al., J. Nano- Electron. Phys. 11 No 1, 01018 (2019)
DOI https://doi.org/10.21272/jnep.11(1).01018
PACS Number(s) 81.05.Je, 72.80.Ey
Keywords Ceramic system, X-ray phase composition, Microstructure (21) , Conductivity (43) .

Samples of ceramic systems Y2O3-ZrO2-SrTiO3 and Y2O3-ZrO2-SrTiO3-BiScO3 were obtained. It was established that Y2O3-ZrO2-SrTiO3 is two-phase: the phase with the cubic structure, belonging to SrTiO3, and the phase with the tetragonal structure (P42/nmc), belonging to Y0.05Zr0.95O2. The introduction of the BiScO3 component into the Y2O3-ZrO2-SrTiO3 system leads to the formation of three phases: the cubic phase with the space symmetry group, the cubic phase with symmetry, and the tetragonal phase with P4mm symmetry. The reflexes from the cubic phase of belong to the cubic modification of zirconia. The cubic phase of and the tetragonal phase of P4mm belong to SrTiO3-BiScO3. Using scanning electron microscopy, it was shown that the addition of BiScO3 additive to the Y2O3-ZrO2-SrTiO3 ceramic system leads to a significant decrease in the grain size and greater homogeneity of the material. Based on the analysis of the results of studies of the specific electrical conductivity of the ceramic systems Y2O3-ZrO2-SrTiO3 and Y2O3-ZrO2-SrTiO3-BiScO3, the introduction of the BiScO3 additive into the ceramic system reduces the activation energy of the conductivity process from 1.5 eV to 0.82 eV.

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