Humidity sensing potential of Fe2TiO5—pseudobrookite
Authorized Users Only
2018
Authors
Nikolić, Maria Vesna
Luković, Miloljub D.

Vasiljević, Zorka Ž.

Labus, Nebojša

Aleksić, Obrad S.
Article (Published version)

Metadata
Show full item recordAbstract
Bulk samples of pseudobrookite with an orthorhombic crystal structure were prepared by sintering a mixture of starting hematite and anatase nano powders in the weight ratio 60:40 at three different sintering temperatures (950, 1050 and 1150 °C) resulting in different microstructures determined by SEM analysis. Humidity sensing properties of pseudobrookite were investigated by measuring changes in electrical properties at operating temperatures of 20, 40 and 60 °C in the frequency range 100 Hz–100 kHz in the relative humidity range 30–90% in a climatic chamber. At 100 Hz, and 20 °C the impedance of pseudobrookite sintered at 1150 °C reduced over 5 times in the humidity range 40–90%, and 7 times at 60 °C for pseudobrookite sintered at 950 °C. Detailed analysis of dielectric properties showed that the dielectric constant increased noticeably with increase in humidity at low frequencies. Electrical conductivity change with frequency followed the Jonscher power law, and increased with incre...ase in relative humidity. The determined frequency constant reduced with increase in sample temperature and increase in relative humidity. The conduction mechanism can be explained using the correlated barrier hopping model. Analysis of complex impedance using an equivalent circuit showed the dominant influence of grain boundaries. Low hysteresis (3.6 and 2.99%) was obtained in the 40–90% humidity range at room temperature (25 °C) for pseudobrookite sintered at 950 and 1150 °C. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
Keywords:
pseudobrookite / humidity sensors / Fe2TiO5 / sinteringSource:
Journal of Materials Science: Materials in Electronics, 2018, 29, 11, 9227-9238Publisher:
- Springer US
Funding / projects:
DOI: 10.1007/s10854-018-8951-1
ISSN: 0957-4522
WoS: 000432326800041
Scopus: 2-s2.0-85044227131
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Nikolić, Maria Vesna AU - Luković, Miloljub D. AU - Vasiljević, Zorka Ž. AU - Labus, Nebojša AU - Aleksić, Obrad S. PY - 2018 UR - https://dais.sanu.ac.rs/123456789/3706 AB - Bulk samples of pseudobrookite with an orthorhombic crystal structure were prepared by sintering a mixture of starting hematite and anatase nano powders in the weight ratio 60:40 at three different sintering temperatures (950, 1050 and 1150 °C) resulting in different microstructures determined by SEM analysis. Humidity sensing properties of pseudobrookite were investigated by measuring changes in electrical properties at operating temperatures of 20, 40 and 60 °C in the frequency range 100 Hz–100 kHz in the relative humidity range 30–90% in a climatic chamber. At 100 Hz, and 20 °C the impedance of pseudobrookite sintered at 1150 °C reduced over 5 times in the humidity range 40–90%, and 7 times at 60 °C for pseudobrookite sintered at 950 °C. Detailed analysis of dielectric properties showed that the dielectric constant increased noticeably with increase in humidity at low frequencies. Electrical conductivity change with frequency followed the Jonscher power law, and increased with increase in relative humidity. The determined frequency constant reduced with increase in sample temperature and increase in relative humidity. The conduction mechanism can be explained using the correlated barrier hopping model. Analysis of complex impedance using an equivalent circuit showed the dominant influence of grain boundaries. Low hysteresis (3.6 and 2.99%) was obtained in the 40–90% humidity range at room temperature (25 °C) for pseudobrookite sintered at 950 and 1150 °C. © 2018, Springer Science+Business Media, LLC, part of Springer Nature. PB - Springer US T2 - Journal of Materials Science: Materials in Electronics T2 - Journal of Materials Science: Materials in Electronics T1 - Humidity sensing potential of Fe2TiO5—pseudobrookite SP - 9227 EP - 9238 VL - 29 IS - 11 DO - 10.1007/s10854-018-8951-1 UR - https://hdl.handle.net/21.15107/rcub_dais_3706 ER -
@article{ author = "Nikolić, Maria Vesna and Luković, Miloljub D. and Vasiljević, Zorka Ž. and Labus, Nebojša and Aleksić, Obrad S.", year = "2018", abstract = "Bulk samples of pseudobrookite with an orthorhombic crystal structure were prepared by sintering a mixture of starting hematite and anatase nano powders in the weight ratio 60:40 at three different sintering temperatures (950, 1050 and 1150 °C) resulting in different microstructures determined by SEM analysis. Humidity sensing properties of pseudobrookite were investigated by measuring changes in electrical properties at operating temperatures of 20, 40 and 60 °C in the frequency range 100 Hz–100 kHz in the relative humidity range 30–90% in a climatic chamber. At 100 Hz, and 20 °C the impedance of pseudobrookite sintered at 1150 °C reduced over 5 times in the humidity range 40–90%, and 7 times at 60 °C for pseudobrookite sintered at 950 °C. Detailed analysis of dielectric properties showed that the dielectric constant increased noticeably with increase in humidity at low frequencies. Electrical conductivity change with frequency followed the Jonscher power law, and increased with increase in relative humidity. The determined frequency constant reduced with increase in sample temperature and increase in relative humidity. The conduction mechanism can be explained using the correlated barrier hopping model. Analysis of complex impedance using an equivalent circuit showed the dominant influence of grain boundaries. Low hysteresis (3.6 and 2.99%) was obtained in the 40–90% humidity range at room temperature (25 °C) for pseudobrookite sintered at 950 and 1150 °C. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.", publisher = "Springer US", journal = "Journal of Materials Science: Materials in Electronics, Journal of Materials Science: Materials in Electronics", title = "Humidity sensing potential of Fe2TiO5—pseudobrookite", pages = "9227-9238", volume = "29", number = "11", doi = "10.1007/s10854-018-8951-1", url = "https://hdl.handle.net/21.15107/rcub_dais_3706" }
Nikolić, M. V., Luković, M. D., Vasiljević, Z. Ž., Labus, N.,& Aleksić, O. S.. (2018). Humidity sensing potential of Fe2TiO5—pseudobrookite. in Journal of Materials Science: Materials in Electronics Springer US., 29(11), 9227-9238. https://doi.org/10.1007/s10854-018-8951-1 https://hdl.handle.net/21.15107/rcub_dais_3706
Nikolić MV, Luković MD, Vasiljević ZŽ, Labus N, Aleksić OS. Humidity sensing potential of Fe2TiO5—pseudobrookite. in Journal of Materials Science: Materials in Electronics. 2018;29(11):9227-9238. doi:10.1007/s10854-018-8951-1 https://hdl.handle.net/21.15107/rcub_dais_3706 .
Nikolić, Maria Vesna, Luković, Miloljub D., Vasiljević, Zorka Ž., Labus, Nebojša, Aleksić, Obrad S., "Humidity sensing potential of Fe2TiO5—pseudobrookite" in Journal of Materials Science: Materials in Electronics, 29, no. 11 (2018):9227-9238, https://doi.org/10.1007/s10854-018-8951-1 ., https://hdl.handle.net/21.15107/rcub_dais_3706 .