Magnetic Loss in Microwave Heating
Magnetic Loss in Microwave Heating
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DOI：
10.1143/apex.5.027304
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发表时间：
2012-02
影响因子：
2.3
通讯作者：
Z. Peng;Jiann-Yang Hwang;Matthew Andriese
中科院分区：
文献类型：
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作者：
Z. Peng;Jiann-Yang Hwang;Matthew Andriese
推导了微波辐照下材料磁损耗量化的简化公式，说明了磁损耗在微波加热中的重要性。利用推导出的方程计算了5种铁氧体（BaFe12O19、SrFe12O19、CuFe2O4、CuZnFe4O4和NiZnFe4O4）在2.45 GHz下的磁损耗。研究发现，微波加热铁氧体的磁损耗约为介电损耗的四倍。这些结果，通过计算，从理论上证明了磁性介质材料在磁场中比在微波施加器的电场中加热得快得多。
A simplified equation for quantifying magnetic loss in materials under microwave irradiation was derived to demonstrate the importance of magnetic loss in microwave heating. The magnetic losses for five ferrites, namely, BaFe12O19, SrFe12O19, CuFe2O4, CuZnFe4O4, and NiZnFe4O4 were calculated at 2.45 GHz using the derived equation. It is found that magnetic loss is up to approximately four times greater than dielectric loss in the microwave heating of ferrites. These results, through the calculations, theoretically demonstrate that magnetic dielectric materials are heated much faster in a magnetic field than in an electric field of the microwave applicator.