Pingale, S. S. ; Patil, S. F. ; Vinod, M. P. ; Pathak, G. ; Vijayamohanan, K. (1996) Mechanism of humidity sensing of Ti-doped MgCr2O4 ceramics Materials Chemistry and Physics, 46 (1). pp. 72-76. ISSN 0254-0584
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0254-0584(96)80133-7
Abstract
The mechanism of humidity sensing of Ti-doped MgCr2O4 ceramics has been investigated using a combination of various techniques,such as cyclic voltammetry, electron spin resonance spectroscopy (ESR), microcalorimetry and point of zero ζ potential measurements, to illustrate the importance of the distribution of acidic and basic sites on the surface. Powder X-ray diffraction patterns prior to the measurements confirm the singlephase behavior of MgCr2O4 as well as the expansion of the spinel lattice with the incorporation of Ti. The evidence obtained from electrochemical and ESR experiments indicates the crucial role of the Cr3+ /Cr2+ redox change on the surface as the main reason for humidity sensing.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Humidity Sensors; Magnesium Chromate; Ceramic Humidity Sensors |
| ID Code: | 53289 |
| Deposited On: | 05 Aug 2011 11:16 |
| Last Modified: | 05 Aug 2011 11:16 |
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