金属基电磁兼容吸波材料研究

论文摘要

吸波材料是指能吸收、衰减入射的电磁波,并将其电磁能转换成热能耗散掉或使电磁波因干涉而消失的一类材料。它早期主要应用于军事方面,而近二十年来,由于民用的需要,吸波材料也大量用于民用电器。该课题主要选材是磁性金属粉和硅橡胶如RTV-998（矽利康）或其他固态硅橡胶。本文将纯度为98.5%的粒状铁粉掺入硅橡胶中,从样品的厚度等来考察复合材料的吸波性能。本研究表明,粒状金属粉与硅橡胶构成的复合材料,在低频段5.88.0GHz ,厚度越大有利于电磁波的进一步吸收,而在高频段8.012.5GHz,随厚度的增加,吸收性能先有所增加而后下降,而最佳吸收区向低频移动。本文分析了几家外国公司样品的微观形貌,成分和吸收性能的关系,研究发现:一方面,钛锆粒状吸收材料相对于铁及其合金体现了较佳吸收性能,另一方面,片状吸收剂相对球形吸收剂能更有效的吸收电磁波。本文利用国内铁粉研制的电磁吸波材料,研究了铁粉形态对吸波性能的影响。片状金属吸波体在相同的厚度下确实体现了更好的吸波性能,和国外样品相比,本文研制的金属微片吸波体,在测试频段,比相同成分厚度的国外样品表现出了更优异的吸收性能,这可能归因于更细的片状金属,界面极化损失更为强烈。

论文目录

• 摘要
• ABSTRACT
• ACKNOWLEDGEMENTS
• CHAPER 1 NTRODUCTION
• 1.1 The background of absorbing material
• 1.1.1 Textile fiber absorbing material
• 1.1.2 Nanometer absorbing material
• 1.1.3 Photonic crystal electromagnetism material
• 1.1.4 Electric conduction high polymer material
• 1.1.5 Chiral absorbing material
• 1.1.6 Plasma stealth material
• 1.1.7 Superfine metal powder absorbing material
• 1.2 Topic background
• 1.3 The topic originates, the goal and the significance
• 1.4 Absorbing principle and the related mechanism
• 1.4.1 Absorbing steps
• 1.4.2 Fundamental theory
• 1.5 Main research contents
• CHAPER 2 EXPERIMENTS AND EQUIPMENTS
• 2.1 Raw Materials
• 2.2 Processing （Formed craft）
• 2.3 Sample characterization
• 2.4 Pure powdered iron corrosion preventing protection
• 2.5 Performance testing
• 2.5.1 Method of coaxial cavity
• 2.5.2 Method of arch form
• CHAPTER 3 RESULTS AND DISCUSSION
• 3.1 Each kind of representative sample microscopic morphology, composition and absorption analysis
• 3.1.1 Morphology, composition and performance of the samples from Japan
• 3.1.2 Morphology, composition and performance of the samples from USA
• 3.1.3 Morphology, composition and performance of the samples from Taiwan and Korea
• 3.2 The mechanical alloying （MA） processing and analysis
• 3.3 The performance test analysis
• 3.3.1 Analysis of coaxial cavity test
• 3.3.2 Analysis of arch frame test
• 3.4 Silane anticorrosive treatment analysis
• CHAPTER 4 CONCLUSION
• REFERENCES