1. A general model of dielectric constant for porous materials
- Author
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Kai-Lun Zhang, Bao-Xun Zhang, Ke-Tao Zhan, Peng He, Wei-Li Song, Xing-Da Liu, and Zhi-Ling Hou
- Subjects
Permittivity ,Pore size ,Materials science ,Physics and Astronomy (miscellaneous) ,Condensed matter physics ,Wave propagation ,business.industry ,Physics::Optics ,02 engineering and technology ,Dielectric ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Physics::Geophysics ,0104 chemical sciences ,Wavelength ,Optics ,0210 nano-technology ,Porosity ,Structure factor ,business ,Porous medium - Abstract
For eliminating the limits in the classical models, here we establish a general model for precisely predicting dielectric constant of porous materials. In this model, dielectric constant is independent on pore shapes when the pore size is far smaller than electromagnetic wavelengths; however, it depends on the porosities and correlation between the open pore direction and wave propagation direction. The structure factor β in the effective dielectric formula is 1 and 3 for through-hole and closed-pore materials, respectively. The experimental results are in good agreement with the model, suggesting a favorable tool for predicting dielectric properties of porous materials.
- Published
- 2016
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