Skip to main content

SOL-GEL Materials for Gas-Sensing Applications

Wilson, Alan, Wright, John D., Murphy, Julian J., Stroud, M.A.M., Thorpe, Stephen C. (1994) SOL-GEL Materials for Gas-Sensing Applications. Sensors and Actuators B: Chemical, 19 (1-3). pp. 506-510. ISSN 0925-4005. (doi:10.1016/0925-4005(93)01060-H) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:20108)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:


High temperature sintering of porous pellets of metal oxides to form flammable gas sensors remains one of the most straightforward and popular fabrication methods in use today, but is unsatisfactory in many ways including lack of control over structure and morphology of the pellets. In addition, the chemical and physical role of catalytic dopants is often unclear and further sintering during operation can lead to long-term drift and unreliable behaviour. We have been exploring the use of alternative fabrication techniques, for the development of highly sensitive flammable ps detectors, based on the sol-gel process. The main advantage of this technique over conventional processing technologies is the use of homogeneous, multi-component systems which can be prepared to a high degree of purity by mixing the molecular precursor solutions, and the reduction in fabrication temperature leading to unusual glasses or ceramics with better-defined properties. Several advantages in the development of highly sensitive flammable gas sensors are to be expected. Deliberate addition of impurities can be carefully controlled and low temperature fabrication should allow greater control over the structure, stoichiometry and morphology of the sensors. Both of these factors will contribute towards low background conductivity and high purity for high sensitivity. Finally the high porosity and large surface area of glassy materials produced by sol-gel methods should enhance sensitivity in mechanisms dominated by surface phenomena. In this paper we present details of the preparation of novel tin oxide thin-film sensors and initial results of response to a variety of organic solvents and common flammable gases. A comparison with conventional, commercially available tin dioxide (Taguchi) flammable gas sensors will be given.

Item Type: Article
DOI/Identification number: 10.1016/0925-4005(93)01060-H
Subjects: Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > Biosciences
Depositing User: P. Ogbuji
Date Deposited: 09 Jun 2009 14:24 UTC
Last Modified: 16 Nov 2021 09:58 UTC
Resource URI: (The current URI for this page, for reference purposes)
  • Depositors only (login required):

Total unique views for this document in KAR since July 2020. For more details click on the image.