Affiliation:
1. University of Birmingham
2. Graz University of Technology
Abstract
In contrast with metals, the resistivity of ceramics decreases with increasing temperatures.
This phenomenon was first discovered in 1833 by Faraday and remained a mere scientific
curiosity until 1930, when Samuel Ruben proposed the fabrication of a pyrometer device,
which explored the negative temperature coefficient (NTC) of resistance exhibit by Cu2O.
Eight decades later, NTC ceramic thermistors constitute an important business segment for
most electroceramic manufacturers. Here, we present a review of the most significant
scientific and technological advances, which lead to the enormous commercial success of
NTC thermistors. This review concludes with an outlook into future possible applications of
NTC ceramics, providing that some current technological shortcomings (such as ageing) are
resolved.
Publisher
Trans Tech Publications Ltd
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