NTC Thermistor JRM Electronics Letters Accepted Version.pdf (278.62 kB)
Ferrite-based room temperature negative temperature coefficient printed thermistors
journal contribution
posted on 2020-09-29, 11:06 authored by Jack McGhee, Jagdeep Sagu, Darren SoutheeDarren Southee, Peter SA Evans, Upul Wijayantha-Kahagala-GamageTwo screen printing inks were developed for the low-temperature fabrication of printed and flexible thick film negative temperature coefficient (NTC) thermistors able to operate at room temperature. The first of the two screen printing inks developed utilised cobalt ferrite (CoFe2O4) as the temperature sensing material with the second ink incorporating manganese ferrite (MnFe2O4). These were then screen printed onto lithographically printed silver interdigitated electrodes with a 200-micron track and gap using a synthetic paper (Teslin) as the substrate. The inks required a 10-minute curing step at 80oC. Preannealing of the ferrite powders before ink formulation enabled the avoidance of high-temperature processing post-fabrication typically required in industrial thermistor production. The printed thermistors were tested at a controlled constant humidity between 15 and 50oC. Both materials demonstrated typical natural logarithmic responses with high linearity and sensitivity.
History
School
- Mechanical, Electrical and Manufacturing Engineering
- Science
- Design and Creative Arts
Department
- Design
- Chemistry
Published in
Electronics LettersVolume
56Issue
24Pages
1322 - 1324Publisher
Institution of Engineering and Technology (IET)Version
- AM (Accepted Manuscript)
Rights holder
© The Institution of Engineering and TechnologyPublisher statement
This paper is a postprint of a paper submitted to and accepted for publication in Electronics Letters and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library.Acceptance date
2020-09-28Publication date
2020-10-29Copyright date
2020ISSN
0013-5194eISSN
1350-911XPublisher version
Language
- en