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Negative Temperature Coefficient Material with Low Thermal Constant and High Resistivity for Low-Temperature Thermistor Applications.
- Source :
- Journal of the American Ceramic Society; Nov2009, Vol. 92 Issue 11, p2682-2686, 5p, 1 Black and White Photograph, 1 Chart, 6 Graphs
- Publication Year :
- 2009
-
Abstract
- The negative temperature coefficient material with low thermal constant B and high resistivity were explored for low-temperature thermistor applications. The spinel oxide Fe<subscript>0.5</subscript>Cu<subscript>0.2</subscript>Ni<subscript>0.66</subscript>Mn<subscript>1.64</subscript>O<subscript>4</subscript> had a required low B value, but its resistivity was much lower than the required value. To increase the resistivity, yttrium-stabilized zirconia (YSZ) was introduced into the spinel oxide. The spinel oxide in composite with YSZ (80 mol%) exhibited a much increased resistivity (10 479 Ω·cm at 25°C) while without causing much change in the B value (2842 K). It was found that the electrical conduction of the composite can be described quantitatively using the percolation theory. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 92
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 44813645
- Full Text :
- https://doi.org/10.1111/j.1551-2916.2009.03289.x