论文总字数：31190字

摘 要

现代科学和技术的迅速发展对材料的性能提出了越来越高的要求，同时促进了复合材料的迅速发展。作为一类新型的功能薄膜材料，由尺度为纳米量级的金属超微粒子弥散于陶瓷基体中所构成的复合金属陶瓷薄膜体系。由于具有许多独特的光学和电学性质，如显著的三阶非线性光学效应、低的电阻温度系数，特别是金属陶瓷膜理想的吸收特性用于太阳能采集和转换器件的良好前景，引起了人们的极大兴趣。因此，金属陶瓷薄膜研究一直是材料科学研究领域中的重要课题。由金属纳米微粒镶嵌于光学陶瓷基体中形成的复合纳米金属陶瓷薄膜同时具有传统复合材料和现代纳米材料的优越性，小尺寸效应和量子尺寸效应所引起的能带结构变化，使得这种薄膜具有许多独特的光学和电学性质，引起了物理学界和材料学界的广泛关注。本论文主要对贵金属颗粒嵌埋在MgF₂陶瓷基体形成的金属陶瓷薄膜光学性质的尺寸效应进行了研究。在绪论部分，我们综述了上世纪七十年代到本世纪初国内外科研人员对金属陶瓷复合膜制备及光电性质研究的报道，特别关注了复合薄膜中金属颗粒的尺寸、形状及空间分布对薄膜的电学、光学等性质影响的情况。我们简单介绍了描述复合薄膜体系介电性质的Maxwell-Garnett、Bruggeman和Ping Sheng有效介质理论以及所对应的体系微结构模型。我们将理论计算结果同用椭圆偏振光谱仪得到的实验值进行了比较，讨论了三种有效介质理论对不同微结构薄膜体系的适用性。结果表明不同有效介质理论适合描述不同结构复合体系的介电特性。

关键词：金属陶瓷薄膜、有效介质理论、颗粒尺寸效应、光学常数

Abstract

The rapid development of modern science and technology on the performance of the material presented higher requirements, while promoting the rapid development of composite materials.As a new type of functional thin film materials, the scale of nanometers dispersed ultrafine particles of metal thin films on metal-ceramic composite ceramic matrix composed.Due to many unique optical and electrical properties, such as a significant third-order nonlinear optical effects, low temperature coefficient of resistance, especially good prospects for the metal absorption properties of ceramic membranes ideal for solar energy collection and conversion devices, aroused great interest.Therefore, the metal film has been a field of scientific research of ceramic materials is an important issue.From metal nanoparticles embedded in metal-ceramic composite nano thin film optical ceramic matrix can be formed simultaneously with changes in the band structure of the superiority of traditional and modern nano-composite materials, small size effect and quantum size effect caused by making this film has many unique optical and electrical properties, attracted wide attention in physics and materials academia. In the first part,the international achievement of cermet thin film study is reviewed, Which ineludes the technology of preparing the thin films,mierostrueture analysis,and influence of the size,shape and distribution of metal partieles on the optical and electrical properties of cermet films. Three effective medium theories (Maxwell-Garnett,Bruggeman and Ping Sheng theories)and their corresponding models are presented . We compare the theoretical results with the experimental results and diseuss the applieability of the three effective medium theories to nanopartieles cermet films.In this thesis, the particles of precious metals embedded in MgF₂ size effect cermet film optical properties of ceramic matrix formation were studied.

Keywords:cermet films,effective medium theor，size effeet of partieles,optieal

Constants.

目 录

摘要····························································Ⅰ

Abstract·························································Ⅱ

第一章 绪 论

§1.1引言·····················································（1）

§1.2国内相关技术研究 ·······································（2）

§1.3国外相关技术研究·········································（6）

§1.4本论文的工作·············································（13）

§1.5小结·····················································（13）

第二章 有效介质理论

§2.1 Maxwell-Gamett弥散结构理论······························（14）

§2.2 Bruggeman聚集微结构理论·································（17）

§2.3 PingSheng双团簇微结构理论·······························（19）

§2.4 颗粒形状极化因子········································（20）

§2.5 多相混合模型的表征······································（22）

§2.6 小结····················································（23）第三章 Au-MgF₂薄膜光学常数的研究

§3.1 Au-MgF₂薄膜光学常数的计算结果与分析······················（25）

§3.2 有效介质理论及尺寸效应修正·······························（25）

§3.3 结果分析与讨论···········································（27）

§3.4小结·····················································（30）

第四章 结论 ·················································（31）

参考文献 ···················································（32）

致谢···························································（34）

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