Application of Nanocrystalline Pseudobrookite (Fe2TiO5) Thick Films for Humidity Sensing
Abstract
Pseudobrookite nanocrystalline thick films were screen printed on alumina substrate with small interdigitated PdAg electrodes (width 6 mm, length 12 mm, electrode spacing 0.2 mm) and fired at 600°C for 30 minutes. Scanning electron microscopy (SEM) of the thick film surface confirmed the formation of a porous structure consisting of agglomerated nanocrystalline grains of pseudobrookite. Impedance response of pseudobrookite thick film samples was measured in a humidity chamber at operating temperatures of 25 and 50°C in the relative humidity (RH) range 40-90% and frequency range 42 Hz-1 MHz. At the lowest frequency of 42 Hz at 25°C the impedance reduced 7 times (from 35.74 MΩ for RH 40% to 4.91 MΩ for RH 90%) and at 50°C 33 times (from 30.98 MΩ for RH 40% to 0.944MΩ for RH 90%). Low hysteresis (1.82 and 3.65%) was obtained at 25 and 50°C, respectively. Complex impedance was analyzed using an equivalent circuit consisting of parallel impedance and constant phase (CPE) element showing the... dominant influence of grain boundaries. © 2018 IEEE.
Keywords:
humidity / sensors / thick films / temperature measurement / grain boundary / frequency measurementSource:
Proceedings of the International Spring Seminar on Electronics Technology, 2018Publisher:
- IEEE Computer Society
Funding / projects:
- Zero- to Three-Dimensional Nanostructures for Application in Electronics and Renewable Energy Sources: Synthesis, Characterization and Processing (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45007)
- Innovative electronic components and systems based on inorganic and organic technologies embedded in consumer goods and products (RS-MESTD-Technological Development (TD or TR)-32016)
DOI: 10.1109/ISSE.2018.8443672
ISBN: 978-1-5386-5731-7
ISSN: 2161-2536
Scopus: 2-s2.0-85053300822
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - CONF AU - Nikolić, Maria Vesna AU - Luković, Miloljub AU - Vasiljević, Zorka Ž. AU - Vujančević, Jelena PY - 2018 UR - https://dais.sanu.ac.rs/123456789/4587 AB - Pseudobrookite nanocrystalline thick films were screen printed on alumina substrate with small interdigitated PdAg electrodes (width 6 mm, length 12 mm, electrode spacing 0.2 mm) and fired at 600°C for 30 minutes. Scanning electron microscopy (SEM) of the thick film surface confirmed the formation of a porous structure consisting of agglomerated nanocrystalline grains of pseudobrookite. Impedance response of pseudobrookite thick film samples was measured in a humidity chamber at operating temperatures of 25 and 50°C in the relative humidity (RH) range 40-90% and frequency range 42 Hz-1 MHz. At the lowest frequency of 42 Hz at 25°C the impedance reduced 7 times (from 35.74 MΩ for RH 40% to 4.91 MΩ for RH 90%) and at 50°C 33 times (from 30.98 MΩ for RH 40% to 0.944MΩ for RH 90%). Low hysteresis (1.82 and 3.65%) was obtained at 25 and 50°C, respectively. Complex impedance was analyzed using an equivalent circuit consisting of parallel impedance and constant phase (CPE) element showing the dominant influence of grain boundaries. © 2018 IEEE. PB - IEEE Computer Society C3 - Proceedings of the International Spring Seminar on Electronics Technology T1 - Application of Nanocrystalline Pseudobrookite (Fe2TiO5) Thick Films for Humidity Sensing DO - 10.1109/ISSE.2018.8443672 UR - https://hdl.handle.net/21.15107/rcub_dais_4587 ER -
@conference{ author = "Nikolić, Maria Vesna and Luković, Miloljub and Vasiljević, Zorka Ž. and Vujančević, Jelena", year = "2018", abstract = "Pseudobrookite nanocrystalline thick films were screen printed on alumina substrate with small interdigitated PdAg electrodes (width 6 mm, length 12 mm, electrode spacing 0.2 mm) and fired at 600°C for 30 minutes. Scanning electron microscopy (SEM) of the thick film surface confirmed the formation of a porous structure consisting of agglomerated nanocrystalline grains of pseudobrookite. Impedance response of pseudobrookite thick film samples was measured in a humidity chamber at operating temperatures of 25 and 50°C in the relative humidity (RH) range 40-90% and frequency range 42 Hz-1 MHz. At the lowest frequency of 42 Hz at 25°C the impedance reduced 7 times (from 35.74 MΩ for RH 40% to 4.91 MΩ for RH 90%) and at 50°C 33 times (from 30.98 MΩ for RH 40% to 0.944MΩ for RH 90%). Low hysteresis (1.82 and 3.65%) was obtained at 25 and 50°C, respectively. Complex impedance was analyzed using an equivalent circuit consisting of parallel impedance and constant phase (CPE) element showing the dominant influence of grain boundaries. © 2018 IEEE.", publisher = "IEEE Computer Society", journal = "Proceedings of the International Spring Seminar on Electronics Technology", title = "Application of Nanocrystalline Pseudobrookite (Fe2TiO5) Thick Films for Humidity Sensing", doi = "10.1109/ISSE.2018.8443672", url = "https://hdl.handle.net/21.15107/rcub_dais_4587" }
Nikolić, M. V., Luković, M., Vasiljević, Z. Ž.,& Vujančević, J.. (2018). Application of Nanocrystalline Pseudobrookite (Fe2TiO5) Thick Films for Humidity Sensing. in Proceedings of the International Spring Seminar on Electronics Technology IEEE Computer Society.. https://doi.org/10.1109/ISSE.2018.8443672 https://hdl.handle.net/21.15107/rcub_dais_4587
Nikolić MV, Luković M, Vasiljević ZŽ, Vujančević J. Application of Nanocrystalline Pseudobrookite (Fe2TiO5) Thick Films for Humidity Sensing. in Proceedings of the International Spring Seminar on Electronics Technology. 2018;. doi:10.1109/ISSE.2018.8443672 https://hdl.handle.net/21.15107/rcub_dais_4587 .
Nikolić, Maria Vesna, Luković, Miloljub, Vasiljević, Zorka Ž., Vujančević, Jelena, "Application of Nanocrystalline Pseudobrookite (Fe2TiO5) Thick Films for Humidity Sensing" in Proceedings of the International Spring Seminar on Electronics Technology (2018), https://doi.org/10.1109/ISSE.2018.8443672 ., https://hdl.handle.net/21.15107/rcub_dais_4587 .