Strontium-doped hematite as a possible humidity sensing material for soil water content determination.
Jean-Marc Tulliani, Chiara Baroni, Laura Zavattaro, Carlo Grignani
Index: Sensors (Basel.) 13(9) , 12070-92, (2013)
Full Text: HTML
Abstract
The aim of this work is to study the sensing behavior of Sr-doped hematite for soil water content measurement. The material was prepared by solid state reaction from commercial hematite and strontium carbonate heat treated at 900 °C. X-Ray diffraction, scanning electron microscopy and mercury intrusion porosimetry were used for microstructural characterization of the synthesized powder. Sensors were then prepared by uniaxially pressing and by screen-printing, on an alumina substrate, the prepared powder and subsequent firing in the 800-1,000 °C range. These sensors were first tested in a laboratory apparatus under humid air and then in an homogenized soil and finally in field. The results evidenced that the screen printed film was able to give a response for a soil matric potential from about 570 kPa, that is to say well below the wilting point in the used soil.
Related Compounds
Related Articles:
Tracking mobility using human hair: What can we learn from lead and strontium isotopes?
2015-01-01
[Sci. Justice 55(1) , 63-71, (2015)]
2015-03-03
[Environ. Sci. Technol. 49(5) , 2969-76, (2015)]
Diagnostic use of cerebral and extracerebral oxysterols.
2004-02-01
[Clin. Chem. Lab Med. 42(2) , 186-91, (2004)]
2005-02-01
[J. Lipid Res. 46(2) , 191-5, (2005)]
2003-09-01
[Neurochem. Res. 28(9) , 1321-8, (2003)]