本文選題：月壤 + 介電常數(shù)　； 參考：《吉林大學》2015年碩士論文

【摘要】：月球的表層物質(zhì)月壤中富含稀有氣體、鈦鐵礦、He-3等重要資源，反演月壤介電常數(shù)、探測月壤物質(zhì)組成及結(jié)構(gòu)等參數(shù)對月球資源的勘探開發(fā)與利用具有重要現(xiàn)實意義。而且，月壤參數(shù)與月球表面的暴露年齡及撞擊坑年齡大小有著不可分割的聯(lián)系，這給研究月表撞擊歷史和確定月球表面年齡工作也將會帶來重大意義。 通過對經(jīng)典的Maxwell-Garnett與Bruggeman等效介質(zhì)理論以及考慮顆粒間相互作用的Maxwell-Garnett理論進行公式推導，并分析各個理論的適用性，在此基礎上，建立了兩個適用于月壤的等效介質(zhì)模型，用于研究月壤的介電常數(shù)與其組成礦物成分及顆粒大小的關系。 為驗證模型在模擬月壤介電常數(shù)方面的準確性，根據(jù)地面玄武巖（火山巖）不同巖相和產(chǎn)狀，在吉林省輝南、黑龍江阿爾山、黑龍江鏡泊湖和黑龍江五大連池以及河北張家口和內(nèi)蒙古的錫林浩特地區(qū)，采集了不同巖相和產(chǎn)狀的火山巖樣品，將其加工成粉末狀來模擬月壤樣品。利用實驗室的矢量網(wǎng)絡分析儀，選用同軸探頭方法對200目的火山巖樣品及80目~200目等不同粒徑下的單斜輝石、斜長石粉末樣品，以及兩種礦物不同體積分數(shù)混合所得到混合樣品的介電常數(shù)實部進行測量。對比分析實驗測得的實際值與兩個月壤等效介質(zhì)模型模擬得到的混合物等效介電常數(shù)，發(fā)現(xiàn)基于Maxwell-Garnett理論模擬的值較實測值偏小，基于強化Maxwell-Garnett理論的模型模擬得到的值偏大。而基于Bruggeman理論的月壤等效介質(zhì)模型與實測值相比誤差很小，吻合度較高，適用于模擬月壤混合物的等效介電常數(shù)。在完成模型驗證的基礎上，模擬了月壤介電常數(shù)與粒徑、物質(zhì)組成及體積分數(shù)間的關系。得出顆粒粒徑大小在0~150μm之間時，月壤的介電常數(shù)隨著顆粒粒徑的變大而變大，在150~1000μm區(qū)間時，，介電常數(shù)基本保持不變；月壤中礦物對等效介電常數(shù)的貢獻值與其介電常數(shù)值大小呈正相關關系，與介電常數(shù)最大礦物的體積分數(shù)呈正相關系，介電常數(shù)最小礦物的體積分數(shù)呈負相關關系。 在對月壤等效介質(zhì)模型實際應用上，以嫦娥三號測月雷達數(shù)據(jù)為依據(jù)，對其第二通道A、B天線獲得的雷達波數(shù)據(jù)進行拼接、冗余數(shù)據(jù)刪除、數(shù)字濾波等處理。在此基礎上，利用雙天線時延法反演得到嫦娥三號月球車巡視區(qū)域下月壤的平均介電常數(shù)及月壤厚度。最后，依據(jù)月壤等效介質(zhì)模型模擬得到的規(guī)律及反演得到的月壤介電常數(shù)，反演得到粒徑大于150μm的月壤中鈦鐵礦的含量值范圍為0~11.52%；橄欖石為0~56.85%；單斜輝石為0~76.88%；斜長石含量不小于23.11%。與Apollo和Luna采集的樣品實際礦物分析結(jié)果相比，具有一定可信度。模擬反演月壤礦物含量工作也為今后月球探測及月壤資源開發(fā)帶來幫助。
[Abstract]:The lunar soil is rich in rare gases. It is very important for the exploration and utilization of lunar resources to retrieve the permittivity of lunar soil and to detect the composition and structure of lunar soil. Furthermore, the lunar soil parameters are inextricably related to the exposure age of the lunar surface and the age of the crater, which will also bring great significance to the study of the impact history of the lunar surface and the determination of the age of the lunar surface. Based on the formula derivation of the classical Maxwell-Garnett and Bruggeman equivalent medium theory and the Maxwell-Garnett theory considering the interaction between particles, and the analysis of the applicability of each theory, two equivalent media models suitable for lunar soil are established. It is used to study the relationship between the dielectric constant of lunar soil and its mineral composition and particle size. In order to verify the accuracy of the model in simulating the dielectric constant of lunar soil, according to the different lithofacies and occurrence of surface basalt (volcanic rock), in Huinan, Jilin Province, Alshan, Heilongjiang, Samples of volcanic rocks with different lithofacies and occurrence were collected from Jingbo Lake and Wudalianchi of Heilongjiang and Zhangjiakou of Hebei and Xilinhaote of Inner Mongolia. The samples were processed into powder to simulate lunar soil. By using a vector network analyzer in the laboratory, a coaxial probe method was used for the determination of 200 target volcanic samples and 80 mesh / 200 mesh samples of clinopyroxene and plagioclase powder. The real part of the dielectric constant of the mixed samples obtained by mixing the two minerals with different volume fraction was measured. By comparing the actual values measured by experiments with the equivalent dielectric constants of mixtures simulated by the equivalent media model of two lunar soils, it is found that the values based on Maxwell-Garnett theory simulation are smaller than those measured, and the values obtained by model simulation based on enhanced Maxwell-Garnett theory are larger than those based on Maxwell-Garnett theory. The equivalent medium model of lunar soil based on Bruggeman's theory is suitable for simulating the equivalent dielectric constant of lunar soil mixture because of its small error and high consistency compared with the measured data. Based on the model verification, the relationship between the permittivity of lunar soil and particle size, material composition and volume fraction was simulated. The results show that when the particle size is between 0 and 150 渭 m, the dielectric constant of lunar soil increases with the increase of particle size, and the dielectric constant remains basically unchanged in the range of 150 渭 m to 1000 渭 m. The contribution of minerals to the equivalent dielectric constant in lunar soil is positively correlated with its dielectric constant value, positively correlated with the volume fraction of the maximum dielectric constant mineral, and negatively correlated with the volume fraction of the minimum dielectric constant mineral. In the practical application of the lunar soil equivalent medium model, based on the lunar radar data of Chang'e 3, the radar wave data obtained from its second channel AHB antenna are spliced, redundant data deleted, digital filtering and so on. On this basis, the average permittivity and the thickness of lunar soil under the lunar rover of Chang 'e-3 are obtained by using the method of double antenna delay. Finally, according to the simulation of the equivalent medium model of lunar soil and the permittivity of lunar soil obtained by inversion, the content of ilmenite in lunar soil larger than 150 渭 m is obtained in the range of 0 ~ 11.52, olivine is 0, 56.85, clinopyroxene is 0 ~ 76.88, and plagioclase is no less than 23.11. Compared with the actual mineral analysis results of samples collected by Apollo and Luna, it has some reliability. The simulated inversion of lunar soil mineral content will also be helpful for lunar exploration and the development of lunar soil resources in the future.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P184.5

【參考文獻】

相關期刊論文 前7條

1 周永江;陳朝輝;程海峰;曹義;劉海韜;;用FDTD方法研究顆粒型復合材料微波等效介電常數(shù)[J];材料科學與工程學報;2006年06期

2 吳明忠,趙振聲,何華輝;層狀多晶鐵纖維吸波材料的等效電磁參數(shù)[J];磁性材料及器件;1998年01期

3 李君強;陳文革;陶文俊;;粉體粒度對松裝粉體孔隙度影響的計算機模擬研究[J];粉末冶金工業(yè);2011年05期

4 王瑩瑩;葉齊政;;利用強化偶極子模型計算混合體局部電場[J];高電壓技術(shù);2007年11期

5 ;Relative dielectric constant from dry rocks[J];Chinese Science Bulletin;1999年24期

6 肖金凱,賴兆生,馮俊明;巖石和土壤的微波介電特征及其在微波遙感中的應用研究[J];科學通報;1983年17期

7 王取泉,楊柏峰,田德誠,熊貴光,周正國;三組份金屬-介質(zhì)復合體系的彌散結(jié)構(gòu)模型與有效介電函數(shù)[J];量子電子學報;2000年03期

相關博士學位論文 前1條

1 法文哲;月球微波遙感的理論建模與參數(shù)反演[D];復旦大學;2008年

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