Multi-Component Mixture Modeling for the Dielectric Properties of Rubber Wood at Microwave Frequencies
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K.B. Khalid
Summary
Dielectric properties from 1 to 18 GHz of rubber wood are modeled using generalized mixture equations and also with equations proposed by Weiner, Kraszewski, Looyenga and Landou, Lichtenecker. Dielectric properties were measured with an open-ended coaxial line-sensor in three structural directions longitudinal, radial and tangential and at different moisture contents. The dielectric constants were predicted well by the Weiner model for all structural grain directions and it was found that the degree of binding decreases with increasing frequency. However, the Weiner model cannot be used for predicting the dielectric loss factor at frequencies below 3 GHz. This may be due to the high conductive loss in this frequency region. The lower value of the exponents in generalized mixture equation was found suitable for fitting the experimental data as well as the Kraszewski equation. Values predicted by Lichtenecker equations are in well agreement with the experimental data at higher microwave frequencies. The prediction of dielectric loss factor using Kraszewski, Looyenga equations were not possible at frequencies below 3 GHz since it is dominated by conductive loss. Above 3 GHz, it was well predicted by Kraszewski and Looyenga equations.
Copyright © 1999 by Walter de Gruyter GmbH & Co. KG
Articles in the same Issue
- Subject Index
- Author Index
- Species Index
- Contents
- Production of Polygalacturonase and Increase of Longitudinal Gas Permeability in Southern Pine by Brown-Rot and White-Rot Fungi
- Components of Steamed and Non-Steamed Japanese Larch (Larix leptolepis (Sieb. et Zucc.) Gord.) Heartwood Affecting the Feeding Behavior of the Subterranean Termite, Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae)
- Effect of Soluble Nutrient Content in Wood on its Susceptibility to Soft Rot and Bacterial Attack in Ground Test
- Carboxylic Acids of Moroccan Pinus Pinaster Bark Extract
- What Factors Control Dimerization of Coniferyl Alcohol?
- Atmospheric Acetic Acid Pulping of Rice Straw IV: Physico-Chemical Characterization of Acetic Acid Lignins from Rice Straw and Woods. Part 2. Chemical Structures
- Rapid Determination of the Lignin Content in Sitka Spruce (Picea sitchensis (Bong.) Carr.) Wood by Fourier Transform Infrared Spectrometry
- Lignin Analysis by Permanganate Oxidation. II. Lignins in Acidic Organosolv Pulps
- Lignin Depolymerization in Hydrogen-Donor Solvents
- Species Effects on Wood-Liquefaction in Polyhydric Alcohols
- NMR Analysis of Oxidative Alkaline Extraction Stage Lignins
- Reduction of Weathering Degradation of Wood Through Plasma-Polymer Coating
- VOC Extraction from Softwood Through Low-Headspace Heating
- Localization of Wood Improvement Compounds by Microautoradiography and ESEM
- Laser Ablation of Machined Wood Surfaces. 2. Effect on End-Grain Gluing of Pine (Pinus silvestris L.)
- Multi-Component Mixture Modeling for the Dielectric Properties of Rubber Wood at Microwave Frequencies
- Adsorption of Liquids and Swelling of Wood IV. Temperature Dependence on the Adsorption
- Prevention of Extractive Leaching by Chemical Treatments of Wood Surface
Articles in the same Issue
- Subject Index
- Author Index
- Species Index
- Contents
- Production of Polygalacturonase and Increase of Longitudinal Gas Permeability in Southern Pine by Brown-Rot and White-Rot Fungi
- Components of Steamed and Non-Steamed Japanese Larch (Larix leptolepis (Sieb. et Zucc.) Gord.) Heartwood Affecting the Feeding Behavior of the Subterranean Termite, Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae)
- Effect of Soluble Nutrient Content in Wood on its Susceptibility to Soft Rot and Bacterial Attack in Ground Test
- Carboxylic Acids of Moroccan Pinus Pinaster Bark Extract
- What Factors Control Dimerization of Coniferyl Alcohol?
- Atmospheric Acetic Acid Pulping of Rice Straw IV: Physico-Chemical Characterization of Acetic Acid Lignins from Rice Straw and Woods. Part 2. Chemical Structures
- Rapid Determination of the Lignin Content in Sitka Spruce (Picea sitchensis (Bong.) Carr.) Wood by Fourier Transform Infrared Spectrometry
- Lignin Analysis by Permanganate Oxidation. II. Lignins in Acidic Organosolv Pulps
- Lignin Depolymerization in Hydrogen-Donor Solvents
- Species Effects on Wood-Liquefaction in Polyhydric Alcohols
- NMR Analysis of Oxidative Alkaline Extraction Stage Lignins
- Reduction of Weathering Degradation of Wood Through Plasma-Polymer Coating
- VOC Extraction from Softwood Through Low-Headspace Heating
- Localization of Wood Improvement Compounds by Microautoradiography and ESEM
- Laser Ablation of Machined Wood Surfaces. 2. Effect on End-Grain Gluing of Pine (Pinus silvestris L.)
- Multi-Component Mixture Modeling for the Dielectric Properties of Rubber Wood at Microwave Frequencies
- Adsorption of Liquids and Swelling of Wood IV. Temperature Dependence on the Adsorption
- Prevention of Extractive Leaching by Chemical Treatments of Wood Surface
