電介質(zhì)的極化及相關(guān)性質(zhì)的分析和研究

應(yīng)用物理學(xué)論文編號(hào):WLX095  字?jǐn)?shù):7362,頁數(shù):19

中文摘要 i
英文摘要 ii
目錄 iii
第一章     緒論  1
1.1  研究動(dòng)機(jī)與目的 1
1.2  研究背景 1
1.3  研究方法與系統(tǒng)描述 1
第二章     靜電場(chǎng)中介質(zhì)的極化  2
2.1  電介質(zhì)極化的宏觀特性 2
2.2  用信號(hào)流圖來討論介質(zhì)的極化過程 4
2.2.1  信號(hào)流圖 4
2.2.2  均勻極化介質(zhì)球極化過程的信號(hào)流圖 4
2.2.3  一般情形下各向同性線性電介質(zhì)的極化過程 5
第三章     交變電場(chǎng)中介質(zhì)的極化 7
      3.1  介電系數(shù) 7
      3.2  介質(zhì)在交變電場(chǎng)中的極化強(qiáng)度 7
      3.3  介電損耗 9
           3.3.1 電導(dǎo)損耗 9
           3.3.2 松弛極化損耗 9
           3.3.3 諧振損耗 9
      3.4  介電系數(shù)ω、介電損耗W(P)、介電損耗角正切tanδ與頻率的關(guān)系 10
           3.4.1  當(dāng)ω→0 10
           3.4.2  低頻區(qū) 11
           3.4.3  反常彌散區(qū) 11
           3.4.4  高頻區(qū) 12
第四章     結(jié)論 14
致謝 15
參考文獻(xiàn) 16

摘要
本文提出了靜電場(chǎng)中介質(zhì)的宏觀特性，介質(zhì)在電場(chǎng)作用下發(fā)生的極化過程中表現(xiàn)的一些性質(zhì)，用信號(hào)流圖討論了均勻介質(zhì)球的極化過程和一般情形下各向同性線性電介質(zhì)的極化過程。交變電場(chǎng)中的介電系數(shù)反映了電介質(zhì)儲(chǔ)存電荷和電能的能力，介質(zhì)極化強(qiáng)度與恒定電場(chǎng)中的介質(zhì)極化強(qiáng)度的不同情況;介電損耗產(chǎn)生的原因包括電導(dǎo)損耗、松弛極化損耗、諧振損耗，它們與電場(chǎng)頻率分別在，低頻區(qū)，反常彌散區(qū)和高頻區(qū)四種情況下的關(guān)系。

關(guān)鍵詞：靜電場(chǎng)  介質(zhì)  交變電場(chǎng)  極化  損耗

Abstract
    The paper suggest that the macroscopic view characteristic property of the medium in the electrostatic field, some properties of media's performance under the electric field's polarization course, and with the signal flow diagram discussed the polarization process of uniform medium and the polarization process of general circumstances isotropic dielectric linear. Dielectric coefficient reflects the media's storage capacity charge and energy in alternating electric field, the polarization of media is different from the media in different situation; dielectric loss, including the cause of conductivity loss, relaxation polarization loss, resonant loss, and the relationships with the frequency of the electric field in , low-frequency, high frequency anomalous dispersion area.

Keywords：electrostatic  media  alternating electric field  polarization  loss