Preparation and characterisation of Cr2−xTixO3+δ and its sensor properties

Jayaraman, V.; Gnanasekar, K. I.; Prabhu, E.; Gnanasekaran, T.; Periaswami, G.

doi:10.1016/s0925-4005(99)00052-0

Cited by 49 publications

(30 citation statements)

References 5 publications

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“…The technique generally used for the preparation of titaniumsubstituted chromium oxides consists of a solid-state reaction between chromium and titanium oxide [1,10]. The Cr 2 O 3 and TiO 2 powders are mixed, milled and calcined to achieve the solidstate reaction.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and thermal expansion of Cr2−xTixO3+δ

Pai

Krishnan

Dash

et al. 2010

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and thermal expansion of Cr2−xTixO3+δ

Pai

Krishnan

Dash

et al. 2010

Journal of Alloys and Compounds

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“…The corresponding gas sensing mechanisms are now well established. By contrast, Cr 2 O 3 gas sensors with p-type semiconducting behaviour have scarcely been investigated, although a few studies have reported gas sensing characteristics of Cr 2 O 3 (Miremadi et al 1994;Dawson et al 1995;Jayaraman et al 1999;Chabanis et al 2001;Pokhrel and Nagaraja 2003;Naisbitt et al 2006;Pokhrel et al 2007;Suryawanshi et al 2008). In the present investigation, the surface of Cr 2 O 3 sensor has been activated by SnO 2 and its effect on sensor response to ethanol vapours and liquefied petroleum gas (LPG) has been studied.…”

Section: Introductionmentioning

confidence: 85%

Ethanol and LPG sensing characteristics of SnO2 activated Cr2O3 thick film sensor

et al. 2010

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The sensing response of pure and SnO 2 activated Cr 2 O 3 to ethanol vapours and liquefied petroleum gas (LPG) has been investigated. Fine particles of commercial chromium oxide powder were selected and deposited as thick film to act as a gas sensor. The sensor surface has been activated by tin dioxide, on surface oxidation of tin chloride. The concentration of tin chloride solution, used as activator, was varied from 0 to 5% and its effect on gas response, selectivity and operating temperature has been studied. It was found that response to ethanol vapours significantly improved, whereas response to LPG remained unaffected. Moreover, operating temperature remains unchanged both for LPG and ethanol vapours.

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“…The p-type semiconductor titanium-doped chromium oxide (CTO) Cr 2´x Ti x O 3+y (0 ď x ď 0.4) shows very good selectivity and sensitivity towards NH 3 and H 2 S [70,71], with several techniques having been used to synthesize CTO gas sensing material including sol-gel [72][73][74][75][76], solid-state [77][78][79], solution [80,81] and CVD [82,83]. The synthesis of CTO powders, prepared via solid-state or sol-gel, and screen-printed onto an alumina sensor platform are the most widely used techniques but CTO has also been deposited using atmospheric pressure CVD (APCVD) using [CrO 2 4 ] as metal precursors [83,84].…”

Section: Complex Oxidesmentioning

confidence: 99%

Chemical Vapour Deposition of Gas Sensitive Metal Oxides

et al. 2016

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This article presents a review of recent research efforts and developments for the fabrication of metal-oxide gas sensors using chemical vapour deposition (CVD), presenting its potential advantages as a materials synthesis technique for gas sensors along with a discussion of their sensing performance. Thin films typically have poorer gas sensing performance compared to traditional screen printed equivalents, attributed to reduced porosity, but the ability to integrate materials directly with the sensor platform provides important process benefits compared to competing synthetic techniques. We conclude that these advantages are likely to drive increased interest in the use of CVD for gas sensor materials over the next decade, whilst the ability to manipulate deposition conditions to alter microstructure can help mitigate the potentially reduced performance in thin films, hence the current prospects for use of CVD in this field look excellent.

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Preparation and characterisation of Cr2−xTixO3+δ and its sensor properties

Cited by 49 publications

References 5 publications

Synthesis, characterization and thermal expansion of Cr2−xTixO3+δ

Synthesis, characterization and thermal expansion of Cr2−xTixO3+δ

Ethanol and LPG sensing characteristics of SnO2 activated Cr2O3 thick film sensor

Chemical Vapour Deposition of Gas Sensitive Metal Oxides

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