悬浊液光谱透射法测量烟尘粒子的复折射率  

Complex Refractive Index Measurement of Fly Ash Particles Using Suspension Spectral Transmission Method

作　　者：邢键 孙晓刚[1] 周琛 原桂彬[1] 张志林 

机构地区：[1]哈尔滨工业大学自动化测试与控制系,黑龙江哈尔滨150001 [2]哈尔滨工程大学理学院光信息科学与技术系,黑龙江哈尔滨150001 [3]黑龙江鑫正投资担保有限责任公司,黑龙江哈尔滨150001

出　　处：《光谱学与光谱分析》2010年第12期3371-3374,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(61071036)资助

摘　　要：光谱复折射率是计算烟尘粒子散射特性的重要参数。该文在光谱透射法反演烟尘粒子复折射率理论的基础上,将烟尘粒子弥散于水中形成烟尘粒子悬浊液,通过可见光分光光度计测量该悬浊液的光谱透射率,通过激光粒度仪获得烟尘粒子的粒径分布,利用悬浊液光谱透射法对烟尘粒子的复折射率进行了反演。研究结果表明,烟尘粒子在可见光波长范围内没有明显吸收带,但随着波长的增加,透过率逐渐降低。烟尘粒子复折射率的反演结果与KBr样片法的反演结果吻合较好。利用悬浊液光谱透射法测量烟尘粒子的复折射率,实验过程简单,约束条件少,并可利用红外分光光度计测量透射率后,拓展至红外波段。Spectral complex refractive index of fly ash particles is an important parameter in the processing of scattering properties calculation.On the basis of theory about inversion of complex refraction index using transimission method,a novel method was proposed,in which fly ash particles were dispersed in the water to compose turbid liquid,and spectral transmissivity of turbid liquid was measured using visible spectrophotometer.Particles size distribution was measured using laser particles sizing.So complex refraction index of fly ash particles was inverted simply.The result indicated that no signifcant absorption appeared in the visible wavelength range for fly ash particles, but transmittance decreased with wavelength increasing.The inversion results from the proposed method agreed with KBr sampling method.The proposed method is simpler,and has fewer constraints,meanwhile the inverion wavelength will be expanded if using infrared spectrophotometer.

关 键 词：烟尘粒子 复折射率 透射法 悬浊液 

分 类 号：TK112[动力工程及工程热物理—热能工程]