NTC Thermistors of Y-Al-Mn-Fe-Ni-Cr-O Ceramics for Wide Temperature Range Measurement

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International Journal on Smart Sensing and Intelligent Systems

Professor Subhas Chandra Mukhopadhyay

Exeley Inc. (New York)

Subject: Computational Science & Engineering, Engineering, Electrical & Electronic

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VOLUME 7 , ISSUE 5 (December 2014) > List of articles

Special issue ICST 2014

NTC Thermistors of Y-Al-Mn-Fe-Ni-Cr-O Ceramics for Wide Temperature Range Measurement

Woonyoung Lee / Jinseong Park

Keywords : NTC thermistor; microstructure; wide temperature range; electrical resistance

Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 7, Issue 5, Pages 1-4, DOI: https://doi.org/10.21307/ijssis-2019-128

License : (CC BY-NC-ND 4.0)

Published Online: 15-February-2020

ARTICLE

ABSTRACT

NTC thermistors of Y-Al-Mn-Fe-Ni-Cr-O systems were fabricated by using normal ceramic processing for wide temperature range measurement. Pt-Rh alloy as electrodes was inserted into the body during the forming process to increase the reliability of high temperature and to decrease the contact resistance. The properties were analyzed by XRD, SEM and resistance measurement. There are no distinct XRD patterns between Y0.2Al0.1Mn0.27Fe0.16Ni0.27Ox and Y0.2Al0.1Mn0.264Fe0.16 Ni0.264Cr0.012Ox because of too small content of Cr2O3, as a dopant, to make peak difference or new phases within the XRD resolution. SEM images and resistance behaviors show the different properties. With the addition of Cr2O3 as a dopant, the crystallinity and the grain size were decreased and increased, respectively. The resistance behaviors were similar but the values are low with Cr2O3. The specimens show the straight line relationship between the electrical resistivity and the temperature over a wide temperature range, indicating NTC thermistor characteristics.

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REFERENCES

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