@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 BSSOx100), 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"
}