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Spark plasma sintering of conductive Sb-doped BaSnO3

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2019
bitstream_5357.pdf (1.529Mb)
Authors
Vukašinović, Jelena
Počuča-Nešić, Milica
Luković Golić, Danijela
Dapčević, Aleksandra
Kocen, Matej
Bernik, Slavko
Lazović, Vladimir
Branković, Zorica
Branković, Goran
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Abstract
Barium stannate, BaSnO3, belongs to the group of perovskite-type alkaline earth stannates. It is an electrical insulator, but doping with proper cation can change its’ electrical properties and transform it into an n-type semiconductor. In this work, we present the Sb-doped barium stannate, BaSn1-xSbxO3, x = 0.00, 0.04, 0.06, 0.08 and 0.10 (labelled as BSSOx100), using BaCO3, SnO2 and Sb2O5 as starting materials. Mechanically activated precursors were calcined at 900 °C for 4 h and subsequently sintered by Spark Plasma Sintering (SPS) Technique. For the characterization of obtained ceramic samples various techniques were used: X-ray Diffraction (XRD) analysis, High Resolution Transmission and Field Emission electron microscopy (HRTEM and FESEM) and UV-Vis spectroscopy. Electrical conductivity of BaSn1-xSbxO3 ceramic samples was determined by measuring the current-voltage (I–U) characteristics in different mediums (air, silicon oil) at room temperature and temperatures up t...o 150 °C. XRD analysis confirmed the formation of the cubic BaSnO3 perovskite phase as a major, and tetragonal Ba2SnO4 as a secondary phase. The content of Ba2SnO4 phase decreased with introducing of Sb into the BaSnO3 lattice. FESEM micrographs of fractured BaSn1-xSbxO3 ceramic samples showed well-densified microstructure and decrease of grain size with the increment of x. HRTEM analyses revealed the existence of low angle grain boundary (LAGB), which provides low energy conduction path of electrons. The results obtained from UV-Vis spectroscopy, indicated the decrease of band gap value of BaSn1-xSbxO3 samples with increasing Sb concentration. Electrical characterization confirmed that Sbdoped BaSnO3 exhibits n-type conductivity. BaSn1-xSbxO3 samples with x = 0.04, 0.06, 0.08 showed linear I–U characteristics at temperatures up to 150 ºC. The highest electrical conductivity was 1.96 S/cm for the BaSn0.92Sb0.08O3. The increase of Sb concentration to x = 0.10 led to the loss of I–U characteristics' linearity.

Keywords:
BaSnO3 / Sb-doping / Spark Plasma Sintering / HRTEM analysis / Low angle grain boundary / I–U characteristic
Source:
5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, 2019, 136-
Publisher:
  • University of Belgrade, Institute for Multidisciplinary Research
Funding / projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200053 (University of Belgrade, Institute for Multidisciplinary Research) (RS-200053)

ISBN: 978-86-80109-22-0

[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_rimsi_2037
URI
http://rimsi.imsi.bg.ac.rs/handle/123456789/2037
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Institut za multidisciplinarna istraživanja
TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Dapčević, Aleksandra
AU  - Kocen, Matej
AU  - Bernik, Slavko
AU  - Lazović, Vladimir
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2037
AB  - Barium stannate, BaSnO3, belongs to the group of perovskite-type alkaline earth
stannates. It is an electrical insulator, but doping with proper cation can change its’
electrical properties and transform it into an n-type semiconductor.
In this work, we present the Sb-doped barium stannate, BaSn1-xSbxO3, x = 0.00,
0.04, 0.06, 0.08 and 0.10 (labelled as BSSOx100), using BaCO3, SnO2 and Sb2O5
as starting materials. Mechanically activated precursors were calcined at 900 °C for
4 h and subsequently sintered by Spark Plasma Sintering (SPS) Technique. For the
characterization of obtained ceramic samples various techniques were used: X-ray
Diffraction (XRD) analysis, High Resolution Transmission and Field Emission
electron microscopy (HRTEM and FESEM) and UV-Vis spectroscopy. Electrical
conductivity of BaSn1-xSbxO3 ceramic samples was determined by measuring the
current-voltage (I–U) characteristics in different mediums (air, silicon oil) at room
temperature and temperatures up to 150 °C.
XRD analysis confirmed the formation of the cubic BaSnO3 perovskite phase as
a major, and tetragonal Ba2SnO4 as a secondary phase. The content of Ba2SnO4
phase decreased with introducing of Sb into the BaSnO3 lattice. FESEM
micrographs of fractured BaSn1-xSbxO3 ceramic samples showed well-densified
microstructure and decrease of grain size with the increment of x. HRTEM analyses
revealed the existence of low angle grain boundary (LAGB), which provides low
energy conduction path of electrons. The results obtained from UV-Vis
spectroscopy, indicated the decrease of band gap value of BaSn1-xSbxO3 samples
with increasing Sb concentration. Electrical characterization confirmed that Sbdoped
BaSnO3 exhibits n-type conductivity. BaSn1-xSbxO3 samples with x = 0.04,
0.06, 0.08 showed linear I–U characteristics at temperatures up to 150 ºC. The
highest electrical conductivity was 1.96 S/cm for the BaSn0.92Sb0.08O3. The increase
of Sb concentration to x = 0.10 led to the loss of I–U characteristics' linearity.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade
T1  - Spark plasma sintering of conductive Sb-doped BaSnO3
SP  - 136
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2037
ER  - 
@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Dapčević, Aleksandra and Kocen, Matej and Bernik, Slavko and Lazović, Vladimir and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "Barium stannate, BaSnO3, belongs to the group of perovskite-type alkaline earth
stannates. It is an electrical insulator, but doping with proper cation can change its’
electrical properties and transform it into an n-type semiconductor.
In this work, we present the Sb-doped barium stannate, BaSn1-xSbxO3, x = 0.00,
0.04, 0.06, 0.08 and 0.10 (labelled as BSSOx100), using BaCO3, SnO2 and Sb2O5
as starting materials. Mechanically activated precursors were calcined at 900 °C for
4 h and subsequently sintered by Spark Plasma Sintering (SPS) Technique. For the
characterization of obtained ceramic samples various techniques were used: X-ray
Diffraction (XRD) analysis, High Resolution Transmission and Field Emission
electron microscopy (HRTEM and FESEM) and UV-Vis spectroscopy. Electrical
conductivity of BaSn1-xSbxO3 ceramic samples was determined by measuring the
current-voltage (I–U) characteristics in different mediums (air, silicon oil) at room
temperature and temperatures up to 150 °C.
XRD analysis confirmed the formation of the cubic BaSnO3 perovskite phase as
a major, and tetragonal Ba2SnO4 as a secondary phase. The content of Ba2SnO4
phase decreased with introducing of Sb into the BaSnO3 lattice. FESEM
micrographs of fractured BaSn1-xSbxO3 ceramic samples showed well-densified
microstructure and decrease of grain size with the increment of x. HRTEM analyses
revealed the existence of low angle grain boundary (LAGB), which provides low
energy conduction path of electrons. The results obtained from UV-Vis
spectroscopy, indicated the decrease of band gap value of BaSn1-xSbxO3 samples
with increasing Sb concentration. Electrical characterization confirmed that Sbdoped
BaSnO3 exhibits n-type conductivity. BaSn1-xSbxO3 samples with x = 0.04,
0.06, 0.08 showed linear I–U characteristics at temperatures up to 150 ºC. The
highest electrical conductivity was 1.96 S/cm for the BaSn0.92Sb0.08O3. The increase
of Sb concentration to x = 0.10 led to the loss of I–U characteristics' linearity.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade",
title = "Spark plasma sintering of conductive Sb-doped BaSnO3",
pages = "136",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2037"
}
Vukašinović, J., Počuča-Nešić, M., Luković Golić, D., Dapčević, A., Kocen, M., Bernik, S., Lazović, V., Branković, Z.,& Branković, G.. (2019). Spark plasma sintering of conductive Sb-doped BaSnO3. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade
University of Belgrade, Institute for Multidisciplinary Research., 136.
https://hdl.handle.net/21.15107/rcub_rimsi_2037
Vukašinović J, Počuča-Nešić M, Luković Golić D, Dapčević A, Kocen M, Bernik S, Lazović V, Branković Z, Branković G. Spark plasma sintering of conductive Sb-doped BaSnO3. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade. 2019;:136.
https://hdl.handle.net/21.15107/rcub_rimsi_2037 .
Vukašinović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Dapčević, Aleksandra, Kocen, Matej, Bernik, Slavko, Lazović, Vladimir, Branković, Zorica, Branković, Goran, "Spark plasma sintering of conductive Sb-doped BaSnO3" in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade (2019):136,
https://hdl.handle.net/21.15107/rcub_rimsi_2037 .

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