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Synthesis, structural and morphological property of BaSnO3 nanopowder prepared by solid state ceramic method.

John, Jibi; Pillai, V.P Mahadevan; Thomas, Anitta Rose; Philip, Reji; Joseph, Jaison; Muthunatesan, S.; Ragavendran, V.; Prabhu, Radhakrishna

Authors

Jibi John

V.P Mahadevan Pillai

Anitta Rose Thomas

Reji Philip

Jaison Joseph

S. Muthunatesan

V. Ragavendran

Radhakrishna Prabhu



Abstract

BaSnO3 is a cubic perovskite-type oxide that behaves as an n-type semiconductor with a wide band gap of 3.4 eV and remains stable at temperatures up to 1000{deg}C. It has wide applications such as thermally stable capacitors, humidity sensors, gas sensors, etc. Barium stannate has also been used in optical applications, in capacitors and ceramic boundary layers, and as a promising material to produce gas phase sensors for the detection of carbon monoxide and carbon dioxide. BaSnO3 powder was prepared by solid state ceramic method. X-ray diffraction pattern of the prepared sample presents all the characteristic peaks of cubic phase of BaSnO3 (JCPDScard no: 15 -0780). The lattice constant for the compound was calculated and found to be 4.101A0 which is in agreement with the reported value (4.112A0). The average size of the crystallites estimated by Debye Scherrer's formula was found to be 49 nm shows the nanostructured nature. The Raman bands observed ~ 139, 833 and 1122 cm-1 can be assigned on the basis of the fundamental vibrations of SnO6 octahedron which has Oh symmetry, in the distorted perovskite structure. The SEM image shows a porous surface morphology with grains of cuboidal structure with well-defined grain boundaries. UV-Visible spectra shows BaSnO3powder exhibit high reflectance in the 400-700 nm range.

Journal Article Type Conference Paper
Start Date Sep 12, 2016
Publication Date May 11, 2017
Journal IOP conference series: materials science and engineering
Print ISSN 1757-8981
Electronic ISSN 1757-899X
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 195
Article Number 012007
Institution Citation JOHN, J., PILLAI, V.P.M., THOMAS, A.R., PHILIP, R., JOSEPH, J., MUTHUNATESAN, S., RAGAVENDRAN, V. and PRABHU, R. 2016. Synthesis, structural and morphological property of BaSnO3 nanopowder prepared by solid state ceramic method. IOP conference series: materials science and engineering [online], 195: proceedings of the 3rd International conference on structural nano composites (NANOSTRUC 2016), 12-16 September 2016, Aberdeen, UK, article number 012007. Available from: https://doi.org/10.1088/1757-899X/195/1/012007
DOI https://doi.org/10.1088/1757-899X/195/1/012007
Keywords Thermally stable capacitors; Humidity sensors; Gas sensors; Optical applications; Capacitors; Ceramic boundary layers

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