Subscribe to our Newsletter and get informed about new publication regulary and special discounts for subscribers!

IJET > IJET Volume 8 > Dielectric and Conductivity Properties of Some...
< Back to Volume

Dielectric and Conductivity Properties of Some Wood Composites

Full Text PDF


This study presents the dielectric and conductivity properties as function of temperature and frequency of wood based composites. These properties were measured by an open-ended coaxial probe at frequency range between 100 kHz to 100MHz, temperature from 30OC to 200OC which is fully computer interfaced. It has been observed that dielectric constant (ε') and dielectric loss factor (ε") increase with increasing temperature and decrease with increasing frequency. At low temperature region, the conductivity depends significantly on the frequency. However, with the increase in temperature dielectric relaxation takes place and the dependency of the conductivity on frequency get reduced. The patterns of variation were established for the studied specimens and discrepancies were discussed. The study of dielectric properties will help in improving the drying, heating and gluing processes of wood and wood based products.


International Journal of Engineering and Technologies (Volume 8)
K.C. Varada Rajulu and B.N. Mohanty, "Dielectric and Conductivity Properties of Some Wood Composites", International Journal of Engineering and Technologies, Vol. 8, pp. 51-60, 2016
Online since:
August 2016

[1] W.L. James, Dielectric properties of wood and hard board variation with temperature, frequency, moisture content and grain direction. No. FSRP-FPL-245. FOREST PRODUCTS LAB MADISON WIS, (1975).

[2] W.L. James, Dielectric properties of Douglas-fire at various combinations of temperature, frequency and moisture content, Forest prod. J. 27(6) (1977) 44-48.

[3] D.W. Hamil, Dielectric properties of douglas-fire measured at microwave frequencies, Forest. Prod. J. 15(2) (1965) 51-56.

[4] C. Skaar, The dielectric properties of wood at several radio- frequencies, Tech. Bull. 69 N.Y. State Coll. Forest., N.Y., (1949).

[5] J. Rafalski, Dielectric properties of compressed beech wood, Forest Prod. J. 17 (1967) 64-65.

[6] R.T. Lin, Review of the dielectric properties of wood and cellulose, Forest prod. J. 17 (1967) 61-66.

[7] G.I. Torgovnikov, Dielectric properties of wood and wood based materials, Springer-Verlag, New York, (1993).

[8] S. Ramaswamy, B. Mohtaderi, Dielectric properties of Typical Australian wood-based biomass metrials at microwave frequency, Energy and Fuels. 24(8) (2010) 4534-4538.

[9] M Norimoto, T Yamada, The dielectric properties of wood III. The relationship between dielectric loss factor and specific gravity, J. Jan. Wood. Res. Soc. 16 (1970) 364-369.

[10] A.Z. Nanassy, Electric polarization measurement on yellow birch, Can. J. Phys. 42 (1964) 1270-1281.

[11] J. Tsutsumi, H. Watanabe, Studies on dielectric behaviour of wood. I Effect of frequency and temperature on ε' and ε", Mokuzai Gakkaishi. 11(6) (1965) 232-236.

[12] Mike Golio: The RF and microwave Handbook. CRC press(2001).

[13] A.B. Lidiard, Handbuch der Physik. 20 (1957) 294.

[14] K. Funke, C. Cramer, D. Wilmer, Diffusion in condensed Matter-methods materials, models. Springer, Berlin, (2005).

[15] W. Dieterich, P. Maass, Non-Debye relaxations in disordered ionic solids, Chemical physics. 284(1) (2002) 439-467.

Show More Hide
Cited By:
This article has no citations.