摘要：液相激光烧蚀法作为制备纳米材料的一种重要手段，有着简便易行，成本低廉的优势。六羟基锡酸锌是一种窄禁带的直接间隙化合物，能用作阻燃剂，烟雾抑制剂等，并且由于其特殊的钙钛矿型结构，能用作光电探测器的芯片部分。本文将用液相激光烧蚀法制备纳米羟基锡酸锌，通过将激光的能量和激光烧蚀时间和样品放置时间设为参数，设置多个对照组，将得到的样品进行表征，比较，发现激光烧蚀在锌和锡的能量接近2：1时，得到的产物最多，产物的形貌最好；而激光烧蚀时间增加，反应进行的程度越大，有利于得到更多的产物；样品放置一段时间后，反应进行得越充分，六羟基锡酸锌结晶化程度越高。

关键词 液相激光烧蚀法 六羟基锡酸锌 激光参数

毕业设计说明书外文摘要

Title Effect of Laser Parameters on Preparation of Nanomaterials by Liquid - phase Laser Ablation

Abstract：Liquid laser ablation method as an important means of preparation of nano-materials, has a simple, low cost advantage. Zinc Hydroxystannate is a direct gap compound with a narrow bandgap and can be used as a flame retardant, a smoke suppressor, etc., and can be used as a chip portion of a photodetector due to its special perovskite structure. In this paper, the nano-zinc stannate was prepared by liquid-phase laser ablation method. By setting the energy of laser and the time of laser irradiation and the time of sample placement as parameters, a plurality of control groups were set up and the obtained samples were characterized. When the energy of zinc and tin is close to 2: 1, the product is the most. The product has the best morphology. The laser irradiation time increases, the degree of reaction is increased, and the more products are obtained. The sample is placed for a period of time , The reaction proceeds more fully, the higher the degree of crystallization of zinc hexahydrate stannate.

Keywords Liquid laser ablation method zinc hexahydroxy stannate laser parameters

目 次

1 引言 1

1.1 纳米材料的概念 1

1.2 纳米材料的理化性质… 1

1.3 纳米材料的发展阶段… 2

1.4 羟基锡酸锌材料简介 3

1.5 羟基锡酸锌材料制备方法… 3

1.6 液相激光烧蚀法 4

2 实验材料和方法… 6

2.1 实验材料与仪器… 6

2.2 实验参数设置… 6

2.3 实验流程… 7

2.4 材料表征… 7

2.4 实验分析过程… 8

3 结果与讨论… 9

3.1 激光能量对纳米羟基锡酸锌制备的影响