微波食品加热
阻抗匹配
材料科学
电介质
电阻抗
吸收(声学)
耗散因子
介电损耗
切线
穿透深度
微波加热
光学
复合材料
光电子学
数学
几何学
物理
量子力学
作者
Zhiwei Peng,Jiann Yang Hwang,Matthew Andriese
标识
DOI:10.1143/apex.5.077301
摘要
A mathematical function for evaluating the impedance matching degree of microwave absorbers was proposed to increase microwave absorption in microwave heating. For nonmagnetic dielectrics, the value of the function depends on the ratio of the sample thickness to the microwave penetration depth and the dielectric loss tangent phase angle. The maximum sample thickness corresponding to perfect impedance matching will decrease with increasing dielectric loss tangent phase angle, and thus, the highest microwave absorption can be achieved. The calculations of impedance matching for hematite indicate that hematite of less than 0.10 m thickness can obtain the maximum absorption throughout the microwave heating process.
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