Zur dielektrischen Anisotropie des Naturholzes im großen Frequenzbereich

The dielectrical anisotropy of wood (spruce, beech and oak) in absolutely dry condition is determined by measurements of the dielectrical constant in the frequency range of 3 • 10^2 to l0^9 c. p. s. It is found that the anisotropy is mainly caused by the macroscopical structure of wood as a compositum of cellular substance and air. - An anomalous dispersion of the dielectrical constant is found. The variation of the dispersion caused by different directions of the electrical field is explained likewise by the mixed structure.« einklappenweiterlesen »