Absrtact: The microwave penetration depth of poplar wood with different moisture content was theoretically studied by using microwave drying equipment,
and the effects of microwave frequency and moisture content of poplar wood on Microwave penetration depth were explored.
The results showed that the penetration depth of 2.45 GHz microwave decreased from 22.30 cm to 3.64 cm when the water content of poplar increased from 30% to 110%, and that of 0.915 GHz microwave decreased from 60.32 cm to 9.85 cm, and the temperature uniformity of poplar decreased with the increase of water content.
The results show that the thickness of the sample should be controlled within the microwave penetration depth during wood drying, which can effectively improve the drying uniformity.
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