Abstract
The direct current (DC) electrical resistivity (ϱ) of three timber species namelyEucalyptus teriticornis, Grevillea robusta andHevea brasiliensis grown as plantations in India has been measured at different moisture contents (MC) and at room temperature. The dependence of the resistivity on moisture content has been found to obey the relations of the type log (ϱ)=A+B log (MC) for the moisture contents ranging from fibre saturation point (fsp) to 10% and of the type log (ϱ)=C+D (MC) for the moisture contents below 10% for all the three species. The effects of grain direction and specific gravity on resistivity were also investigated.
Zusammenfassung
Der elektrische Widerstand (ϱ) von drei Holzarten,Eucalyptus teriticornis, Grevilles robusta undHevea brasiliensis, die in Plantagen in Indien wachsen, wurde bei unterschiedlichen Holzfeuchten und Raumtemperaturen untersucht. Die Abhängigkeit der Widerstandes von der Holzfeuchte folgte Beziehungen vom Typ: log (ϱ)=A+B log (MC) für Holzfeuchten im Bereich des Fasersättigungspunktes (FSP) bis zu 10%. Unterhalb 10% Feuchte folgte die Beziehung für alle drei Holzarten dem Gleichungstyp: log (ϱ)=C+D (MC). Der Einfluß von Faserrichtung und Rohdichte wurde ebenfalls untersucht.
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Sharma, S.K., Shukla, S.R. & Kamala, B.S. Studies on DC electrical resistivity of plantation grown timbers. Holz als Roh- und Werkstoff 55, 391–394 (1997). https://doi.org/10.1007/s001070050252
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DOI: https://doi.org/10.1007/s001070050252