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DC Field | Value | Language |
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dc.contributor.author | Glot, AB | - |
dc.contributor.author | Sandoval-García, AP | - |
dc.contributor.author | Gaponov, AV | - |
dc.contributor.author | Bulpett, R | - |
dc.contributor.author | Jones, BJ | - |
dc.contributor.author | Jimenez-Santana, G | - |
dc.date.accessioned | 2011-07-25T09:59:33Z | - |
dc.date.available | 2011-07-25T09:59:33Z | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | Advances in Technology of Materials and Materials Processing 10: 21-32, Apr 2009 | en_US |
dc.identifier.issn | 1440-0731 | - |
dc.identifier.uri | http://www.azom.com/article.aspx?ArticleID=4718 | en |
dc.identifier.uri | http://bura.brunel.ac.uk/handle/2438/5636 | - |
dc.description | This is the post-print version of the article. The official published version can be obtained from the link below - Copyright @ 2010 AD-Tech. | en_US |
dc.description.abstract | Tin dioxide based varistor ceramics SnO2-Co3O4-Nb2O5-Cr2O3-xCuO (x=0; 0.05; 0.1 and 0.5) were made and their electrical properties were studied. The highest nonlinearity coefficient and electric field (at current density 10-3 A cm-2) were obtained for 0.1 mol.% CuO addition. It was observed that low-field electrical conductivity is increased with relative humidity, therefore, materials obtained exhibit double function of varistor and humidity sensor. The highest humidity sensitivity coefficient is found for SnO2-Co3O4-Nb2O5-Cr2O3 ceramics (without CuO). Observed varistor and humidity-sensitive properties are explained in the frames of grain-boundary double Schottky barrier concept as a decrease of the barrier height with electric field or relative humidity. Using suggested simple theory and data obtained on isothermal capacitance relaxation, the energy of the grain-boundary monoenergetic trapping states were estimated. These values are less than found for activation energy of electrical conduction (as a measure of the barrier height). These observations confirm the barrier concept. | en_US |
dc.description.sponsorship | This work is funded by the Royal Society, United Kingdom (2007R1/R26999). | en_US |
dc.language | English | - |
dc.language.iso | en | en_US |
dc.publisher | AD-TECH | en_US |
dc.subject | Electrical conduction | en_US |
dc.subject | Grain boundary | en_US |
dc.subject | Varistor | en_US |
dc.subject | Electroceramics | en_US |
dc.subject | Humidity sensor | en_US |
dc.subject | Tin dioxide | en_US |
dc.title | Electronic properties of SnO2-based ceramics with double function of varistor and humidity sensor | en_US |
dc.type | Research Paper | en_US |
dc.identifier.doi | http://dx.doi.org/10.2240/azojomo0277 | - |
pubs.organisational-data | /Brunel | - |
pubs.organisational-data | /Brunel/Brunel (Active) | - |
pubs.organisational-data | /Brunel/Brunel (Active)/Research Centres | - |
pubs.organisational-data | /Brunel/Research Centres | - |
Appears in Collections: | Materials Engineering Publications The Experimental Techniques Centre |
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Fulltext.pdf | 426.44 kB | Adobe PDF | View/Open |
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