Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
Email

 

You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Impedance spectroscopy and circuit modeling of Southern pine above 20% moisture content

Source: Holzforschung, Vol. 62, pp. 737-744, 2008

Author(s)Zelinka, Samuel L.; Rammer, Douglas R.; Stone, Donald S.

Publication Year: 2008  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4714-1A  FPL-4723-1

Abstract: Impedance spectra were collected from Southern pine (Pinus spp.) equilibrated to a moisture content 20% and a saturated condition. Cylindrical graphite electrodes were embedded in the wood so that they met nearly endto-end along a line parallel to the grain, and impedance properties were characterized as functions of electrode spacing and electrode contact pressure at frequencies between 1=10-1 and 3=105 Hz. The data exhibit a low-frequency tail that can be fit with a Warburg element, indicative of a diffusive motion of charge carriers. Values of the Warburg impedance were compared with previously published data on molar conductivities of endogenous mineral ions in wood. The data suggest that mineral ions are the predominant charge carriers in wood at low frequencies and high moisture contents based on the strong correlation between the Warburg impedance and molar conductivities.

Keywords: Constant phase element, electrical relaxation, electrochemical impedance spectroscopy (EIS), ionic conduction, Warburg impedance, accelerated life testing, electric resistance, corrosion, anti-corrosives, testing, metals, electrochemical analysis, electric properties, wood moisture, impedance spectroscopy, moisture content, electric measurements, electrodes, molar conductivity, accelerated testing, circuit model, Southern pine

File size: 218 kb(s)

Date posted: 11/20/2009

This publication is also viewable on Treesearch:  view
RITS Product ID: 31001
Current FPL Scientists associated with this product (listed alphabetically)
Rammer, Douglas R.
Research General Engineer
Zelinka, Samuel L.
Materials Research Engineer
 

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »


Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »


Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


Nanotechnology

A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »


Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »