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Impact of Microstructure on Humidity Influence on Complex Impedance of Iron Manganite

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2020
Authors
Nikolić, Maria Vesna
Vasiljević, Zorka Ž.
Dojčinović, Milena
Vujančević, Jelena
Radovanović, Milan
Conference object (Published version)
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Abstract
This work deals with our continued research of oxide materials for potential application in gas/humidity sensing. We have made thick film samples using iron manganite powder synthesized by a sol-gel combustion method with a net-like structure, by screen printing on alumina substrate with PdAg interdigitated electrodes. The thick film samples were fired at two temperatures 600 and 800°C. The powder morphology was retained and only the organic compounds in the paste were burnt-out at 600°C, while at 800°C the thick film surface morphology was different where grain growth and individual particles can be observed. We measured complex impedance in a temperature and humidity chamber at room temperature (25°C) in the relative humidity range 30 – 90 % and frequency 100 Hz - 1 MHz. The thick film surface morphology has a significant influence on the effect of humidity on complex impedance. The complex impedance of thick films fired at 600°C was high and did not decrease noticeably with increase... in relative humidity (RH), except for RH 80 and 90%, while thick film samples fired at 800°C had an overall lower impedance that reduced more noticeably with increase in RH 40–70% and even more for RH 80 and 90%.

Keywords:
iron manganite / thick films / complex impedance / relative humidity
Source:
2020 43rd International Spring Seminar on Electronics Technology (ISSE), 2020, 1-5
Publisher:
  • IEEE
Projects:
  • Ministry info:eu-repo/grantAgreement/MESTD/inst-2020/200053/RS// (RS-200053)
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200175 (Institute of Technical Sciences of SASA, Belgrade) (RS-200175)
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200156 (University of Novi Sad, Faculty of Technical Science) (RS-200156)
Note:
  • Peer-reviewed manuscript: https://dais.sanu.ac.rs/handle/123456789/8965

DOI: 10.1109/ISSE49702.2020.9120967

ISBN: 978-1-7281-6773-2

ISSN: 2161-2536

Scopus: 2-s2.0-85087611242
[ Google Scholar ]
URI
http://dais.sanu.ac.rs/123456789/8965
https://dais.sanu.ac.rs/123456789/10026
Collections
  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences of SASA

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