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Title: Structure and properties of hydrogen-charged electrochromic Nb 2O5 ceramics
Authors: Ding, MJ
Chen, WP
Gu, YH
Wang, Y 
Keywords: Donor
Issue Date: 2009
Publisher: Scientific.Net
Source: Advanced materials research, 2009, v. 79-82, p. 1619-1622 How to cite?
Journal: Advanced materials research 
Abstract: ND2O5 ceramic pellets were prepared through sintering and hydrogen was introduced into ND2O5 pellets through a process known as electrochemical hydrogen charging, in which ND 2O5 acted as the cathode in a 0.01 M NaOH solution. The color of ND2O5 was found dramatically darkened after the treatment while X-ray diffraction indicated that there was no change in the crystal structure. I-V and R-T measurements showed that the resistivity was greatly decreased after hydrogen charging and the resistivity exhibited a negative-temperature-coefficient (NTC). It was proposed that hydrogen can be incorporated into Nb2O5 lattice and occupies at some interstitial site. Nb5+ of Nb2O5 is partially reduced to Nb4- by hydrogen and the NTC-type conduction results from electron transfer between Nb5+ and Nb4- through a hopping mechanism.
Description: 2nd International Conference on Multi-Functional Materials and Structures, MFMS-2009, Qingdao, 9-12 October 2009
ISBN: 0878493042
ISSN: 1022-6680
EISSN: 1662-8985
DOI: 10.4028/
Appears in Collections:Conference Paper

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