微波加熱過程中的極化電荷屏蔽效應探討

Effects of Polarization-Charge Shielding in Microwave Heating

林明勳(Ming-Syun Lin)

指導教授 ： 朱國瑞

國立臺灣大學/理學院/物理研究所/碩士(2015年)

https://doi.org/10.6342/NTU.2015.01407

摘要

為了探討正處於興新領域的微波加熱介電材質，其基本物理問題，我們提出極化電荷造成的屏蔽效應理論，以及此效應在微波加熱的實驗觀察。把非球型的樣品放入微波暗室，並用均勻的行進波照射。由於極化電荷造成的屏蔽效應，樣品的加熱速率，取決於樣品的形狀與其相對外加電場的方向，而這可能就是造成溫差的主要成因。這是此意義重大的效應，首次被完整研究。

關鍵字

微波加熱 ； 極化電荷屏蔽效應 ； 微波暗室

並列摘要

To address a basic physics issue in the growing field of dielectric heating by microwaves，we present the theory and experimental observation on the effect of polarization-charge shielding. Non-spherical samples are irradiated by a uniform traveling wave in an anechoic chamber. The polarization-charge shielded heating rate is shown to be highly dependent on the sample’s shape and orientation relative to the wave electric field，which may become a major cause for an excessive temperature spread. This is a significant effect studied comprehensively for the first time，along with a demonstrated remedy.

並列關鍵字

microwave heating ； polarization charge shielding ； anechoic chamber

參考文獻

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