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Erschienen in:
01.01.2012 | Originals Originalarbeiten
Complex resistivity measurements on oak
Erschienen in: European Journal of Wood and Wood Products | Ausgabe 1-3/2012
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Abstract
In this paper complex electrical resistivity measurements on oak samples are described. They were performed to study the effect of anisotropy, moisture content and fungi-infection. The laboratory results indicate that anisotropy of wood affects not only the electrical resistivity but also the phase shift. The results can be explained by the macro- and microstructure of wood. The moisture experiment showed that resistivity and phase behave differently. As expected, resistivity decreases with increasing moisture. In contrast, phase and the imaginary part of conductivity first increase with rising moisture content but then start to decrease again at higher moisture level.
The experiment involving fungi-infected wood proved particularly important. Its results suggest that phase can be used as an indicator for the structural damage of wood cells.