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Strontium-doped hematite as a possible humidity sensing material for soil water content determination. | LitMetric

Strontium-doped hematite as a possible humidity sensing material for soil water content determination.

Sensors (Basel)

Department of Applied Science and Technology, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.

Published: September 2013

AI Article Synopsis

Article 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.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3821339PMC
http://dx.doi.org/10.3390/s130912070DOI Listing

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