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Title: Hydrogen-Induced Degradation in Mn-Co-Ni-O Negative-Temperature-Coefficient Thermistors
Authors: Chen, WP
Wang, XX
Wang, J
Wang, Y 
Chan, HLW 
Keywords: Degradation
Issue Date: 2003
Publisher: Institute of Pure and Applied Physics
Source: Japanese journal of applied physics. Part 1, Regular papers and short notes 2003, v. 42, no. 10, p. 6621-6622 How to cite?
Journal: Japanese journal of applied physics. Part 1, Regular papers and short notes 
Abstract: The silver electrode of negative-temperature-coefficient (NTC) Mn-Co-Ni-O ceramic thermistors was converted into a cathode in 0.01 M NaOH solution to induce hydrogen evolution by electrolysis of water, which resulted in an obvious increase in the room temperature resistance of the thermistors. It was proposed that atomic hydrogen generated by electrolysis of water induces an ambient temperature reduction in NTC ceramics and the change in resistance can be explained by the reduction of Mn4+ to Mn3+ in the octahedral sites of the spinel lattice. This hydrogen-induced degradation is especially important for the NTC chip thermistors used in surface mounting technology (SMT).
ISSN: 0021-4922
EISSN: 1347-4065
DOI: 10.1143/JJAP.42.6621
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