Dielectric Properties of Moist Wood
The absolute value of the moisture content of wood can reach 250% and even higher. Free moisture has values of dielectric properties many times higher than those of wood. Interacting with wood in the process of adsorption and capillary condensation, the moisture changes its own dielectric properties and causes changes in the dielectric properties of the wood. Free moisture filling the cell cavities also changes the character of interactions between the wood and the electromagnetic field. These changes result in changes of the dielectric properties of the wood, particularly at frequencies at which water possesses anomalously high dielectric parameters. Water is the ingredient that changes the dielectric properties of wood the most and in many cases determines them.
KeywordsDielectric Property Wood Density Loss Tangent Loss Factor Wood Species
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