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研究生:林明勳
研究生(外文):Ming-Syun Lin
論文名稱:微波加熱過程中的極化電荷屏蔽效應探討
論文名稱(外文):Effects of Polarization-Charge Shielding in Microwave Heating
指導教授:朱國瑞朱國瑞引用關係
口試委員:陳寬任張存續陳漢穎劉偉強
口試日期:2015-07-15
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:物理研究所
學門:自然科學學門
學類:物理學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:英文
論文頁數:23
中文關鍵詞:微波加熱極化電荷屏蔽效應微波暗室
外文關鍵詞:microwave heatingpolarization charge shieldinganechoic chamber
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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。

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.

謝辭 ………………………………………………………………………………iii
中文摘要…………………………………………………………………… iv
Abstract …………………………………………………………………………… v
目錄 …………………………………………………………………………… vi
圖表錄 …………………………………………………………………………… vii
第一章Introduction ……………………………………………………………… 1
第二章Theory of dielectric heating ……………………………………………… 4
2.1 Polarization-charge shielding of spherical objects ……………… 5
2.2 Polarization-charge shielding of non-spherical objects …………… 6
第三章 Features of the experimental setup …………………………………… 7
第四章 Experimental observation of Polarization - charge shielding …… 10
第五章 An effective remedy …………………………………………………… 12
第六章 Physical interpretation by numerical simulation……………………… 13
第七章 Shape dependence of the heating rate ……………………………… 15
第八章 Summary ……………………………………………………………… 16
附錄A 紅外線熱像儀 ( IR camera )…………………………………………… 18
附錄B HFSS模擬 : 24GHz線極化微波加熱均勻度 ………………………… 20
參考文獻 ………………………………………………………………………… 22


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