Use of tin dioxide sensor to control a domestic gas heater

SnO2, ZnO and related polycrystalline compound semiconductors: An overview and review on the voltage-dependent resistance (non-ohmic) feature

“…42,43,44 The sensor properties of SnO 2 depend not only on such factors as the oxide's surface stoichiometry, the methodology used to prepare the powder, temperature and atmosphere of calcination but also, and mainly, on the high specific area deriving from the low densification of this oxide. 34,35,36,37,38,39,40,41 It is generally assumed that low densification of pure SnO 2 is caused by the predominance of non-densifying mechanisms, such as evaporation-condensation. 34,39 These mechanisms, which are responsible only for the growth of grains and the formation of the necks between particles during sintering, do not promote densification.…”

“…33,29,32 This is expected since for SnO 2 -based VDRs the sintering mechanism usually involves a solid-state sintering 29 and not the commonly liquid-phase sintering established for ZnO-based VDR compositions. 1,2 Besides VDR systems, SnO 2 has been employed in a great number of technological applications, particularly in sensors, catalyzers, electro-optic equipment and photovoltaic cells, 34,35,36,37,38,39,40,41 most of which involve porous ceramics (sensors) and thin films. 42,43,44 The sensor properties of SnO 2 depend not only on such factors as the oxide's surface stoichiometry, the methodology used to prepare the powder, temperature and atmosphere of calcination but also, and mainly, on the high specific area deriving from the low densification of this oxide.…”

Effect of Humid Aging on the Oxygen Adsorption in SnO2 Gas Sensors

“…Resistive-type semiconductor gas sensors using SnO 2 have been well investigated and successfully applied to commercial gas alarm systems, air quality sensors, odor sensors, and alcohol monitors for human breath since their invention 65 years ago [1,2,3,4]. SnO 2 gas sensors detect combustible gases such as hydrogen, carbon monoxide, and ethanol by a change in the electrical resistance.…”

Varistores à base de SnO2: estado da arte e perspectivas

“…[1][2][3][4][5][6][7][8]. A maioria dessas aplicações envolve cerâmicas porosas (sensores) e filmes finos [9][10][11].…”

“…As propriedades sensoras do SnO 2 não só dependem de fatores como estequiometria da superfície do óxido, metodologia de preparação do pó, temperatura e atmosfera de calcinação, mas também e principalmente da alta área específica advinda da baixa densificação deste óxido [1][2][3][4][5][6][7][8]. Supõe-se que a baixa densificação seja devida à predominância de mecanismos não densificantes, como evaporação-condensação [1,6].…”