Abstract
The dielectric properties, especially dielectric constant and dielectric loss factor of paddy rice, are very important in drying of paddy rice by microwave dielectric heating. Therefore, in this paper, the dielectric properties of NIPPONBARE and BELLE PATNA were measured at 2.45GHz for several bulk densities, moisture contents and temperatures.
As the results, the dielectric constant and dielectric loss factor of paddy rice were increased with the bulk density, moisture content and temperature within the range of 2.52-5.19 and 0.303-0.963, respectively under the range of bulk density 0.6069-0.7042g/cm3, moisture content 17.0-34.7%d. b and temperature 20-40°C.
