论文标题:纳米ZnO的光学特性及其纳米涂层激光散射特性研究
The Investigation of Laser-Induced Plasma Shock Wave in Different Media
论文作者 汤文兵
论文导师 李相银,论文学位 硕士,论文专业 光学工程
论文单位 南京理工大学,点击次数 121,论文页数 70页File Size2636k
2004-06-01论文网 http://www.lw23.com/lunwen_516059732/ 纳米材料;纳米涂层;随机激光;光致发光;光吸收
Nano material,Nano coat,random laser,light induced luminescence,light absorption
本文主要研究了纳米ZnO的光学特性，并从实验上研究了纳米量级目标涂层的光散射特性。首先介绍了纳米材料的制备，表征和纳米ZnO的基本性质，然后对其光学特性作了探讨，其中介绍了纳米ZnO的紫外随机激光的产生原因及规律，对纳米ZnO的光致发光现象进行了研究，并对其产生的机理，特别是对绿光产生的机制进行了探讨，并得出了初步的结论。对纳米ZnO的透过率和吸收率进行了研究，得到了吸收率和纳米颗粒粒径之间的关系。 本人用自己搭建的实验平台对由清漆做粘结剂制作的纳米ZnO涂层做了激光散射特性研究，探讨了涂层的激光吸收性能，得到纳米量级的ZnO比普通粒径的ZnO吸收强。通过改变温度场，研究了温度场对纳米涂层光散射性能的影响，发现涂层在紫外和红外波段存在较强的吸收，通过材料复合的方法，加强涂层对可见波段的吸收，从而得到宽频谱，强吸收的纳米涂层。实验结论较好的符合纳米ZnO强吸收理论。提出了实验的改造方案，通过改进和对其它材料的研究，一定可以实现优良的光吸收。
This thesis regards the optics characteristic of Nano-ZnO as the subject investigated. At the same time it mainly researches the laser light scattering characteristic of Nano magnitude based on experiments.At first it introduces the preparations and tokens of nanophase materials, and elementary features of Nano-ZnO. Then it discusses the optics characteristics of Nano-ZnO, and introduces the generated reasons and rules of ultraviolet random laser of Nano-ZnO. It researches the Nano-ZnO "s light induced luminescence phenomena, and give it"s primary conclusion about the procreant mechanism especially the procreant mechanism of green light. Also it researches the penetrability and absorptivity of Nano-ZnO, and gets the relations between the absorptivity and the grain sizes of nano grains.I use the experimental platform of myself to research the laser light scattering characteristic of Nano-ZnO coat which use varnish as adhesives, and discuss the laser absorptivity of the coat. At last I get the conclusion that the absorptivity of Nano-ZnO is stronger than that of the ZnO with the common grain size. Through changing the temperature field, I research the effect of the temperature field to the laser light scattering characteristic of Nano coat, and find out that the coat in ultraviolet band and infrared band has the stronger absorptivity. Through the manner of compounding the material, stronger the coat"s absorptivity to visible wavelength, I get the Nano coat with wide spectrum and strong absorptivity. The experimental conclusion well accords with the Nano-ZnO"s strong absorptivity theory. The alterable project is pointed out, through improvement and the research to the other material, the excellent light absorption must be realized.
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