Paper Title:

NTC Ceramics: Past, Present and Future

Periodical Advances in Science and Technology (Volume 67)
Main Theme 12th INTERNATIONAL CERAMICS CONGRESS PART F
Edited by Pietro VINCENZINI, Vojislav V. MITIC, Alois LOIDL and Dino FIORANI
Pages 124-133
DOI 10.4028/www.scientific.net/AST.67.124
Citation Antonio Feteira et al., 2010, Advances in Science and Technology, 67, 124
Online since October, 2010
Authors Antonio Feteira, Klaus Reichmann
Keywords NTC, Perovskite, Spinel, Thermistor
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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.

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