基于能量法的材料法向光谱辐射率测量试验研究
毕业论文关键词 傅里叶红外光谱仪 能量法 法向光谱辐射率
Title Experimental study of material normal spectral emissivity measurement based on energy method.
Abstract Based on Fourier transform infrared (FTIR) spectroscopy, one of the energy methods, experimental study of normal spectral emissivity measurement of high temperature resistant solid materials was successfully conducted. Experimental system is composed by a FTIR spectrometer, a reference blackbody heating furnace, a sample heating cavity, an optical converter and a flame cutting machine. The measurements can be done in the spectral range from 2 to 25μm and in the temperature range from 1000 to 1600℃. The reference blackbody heating furnace was employed to calibrate the FTIR spectrometer with the vacuum which can weaken the influence of air. The heating equipment of the system is an acetylene flame cutting machine. The sample heating cavity is used to carry the samples. Some experiments were done for surface of SiC. The relative uncertainties are evaluated to be better than 2.1%.
Keywords FTIR spectrometer energy method normal spectral emissivity
1绪论1
1.1研究背景和应用前景..1
1.3研究方法4
2相关理论介绍.4
2.1发射率及其测量5
2.2傅里叶变换红外光谱学的基本原理..8
3实验装置介绍.10
3.1实验总体装置布置图..10
3.2样品加热腔.10
3.3光路转换装置..12
3.4FTIR光谱仪.13
4实验操作步骤..14
5实验结果..14
5.1闭口黑体不同温度下的光谱仪信号曲线..14
5.2FTIR光谱仪的标定.15
5.3不同温度间隔对R标定的影响17
5.4黑体在不同温度下发射率的标定.18
5.5系统线性度测试19
5.6�