@conference{
author = "Vukašinović, Jelena and Rapljenović, Željko and Počuča-Nešić, Milica and Ivek, Tomislav and Peter, Robert and Branković, Zorica and Zemljak, Olivera and Branković, Goran",
year = "2022",
abstract = "Barium stannate, BaSnO3 (BSO), is a perovskite-type alkaline earth metal
stannate with almost ideal cubic structure. Appropriate doping can alter this wide
band gap material’s electrical characteristics and change it either into a proton
conductor or n-type semiconductor. In the case of Sb doping on Sn site, BSO
becomes n-type semiconductor with high electrical conductivity at 25 °C.
The major drawback of BSO-based ceramics is its low density. The
conventional solid state procedure requires long thermal treatments with several
intermittent grinding and heating steps at temperatures up to 1600 °C [1].
To overcome this problem, we used Spark Plasma Sintering technique (SPS) for
the preparation of BaSn1-xSbxO3, (x = 0.00 (BSSO0) and 0.08 (BSSO8)) ceramic
samples. The samples structural properties were investigated using XRD (X-Ray
Powder Diffraction), XPS (X-Ray Photoelectron Spectrophotmetry) and SIMS
(Secondary Ion Mass Spectrometry) analyses. XPS analysis revealed the existence
of many structural defects, including mixed oxidation states of tin (Sn2+/Sn4+) and
oxygen vacancies (VO) in both BSSO samples.
The electrical properties of the BSSO ceramic samples were investigated in the
temperature range of 4–300 K. The presence of oxygen vacancies in the BSSO0
sample led to the absence of the standard activated semiconductor behavior,
showing almost linear temperature-dependent resistivity in the examined
temperature range. On the other hand, the BSSO8 sample showed almost temperature-independent resistivity in the range of 70–300 K. This could be a
consequence of the presence of many structural defects such as mixed oxidation
states of Sn2+/Sn4+, probably Sb3+/Sb5+ and significant amount of O- species, as well
as the presence of the low angle grain boundaries found in this sample. The BSSO8
ceramic sample could satisfy the huge demand for the linear resistors with moderate
and high conductivity, due to its low and almost constant electrical resistivity in the
wide temperature.
1. A.-M. Azad, L.L.W. Shyan, T.Y. Pang, C.H. Nee, Ceram. Int., 26 (2000) 685.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "The defect structure and electrical properties of the spark plasma sintered antimony-doped barium stannate",
pages = "76-75",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2025"
}
