光谱学与光谱分析 |
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Complex Refractive Index Measurement of Fly Ash Particles Using Suspension Spectral Transmission Method |
XING Jian1, 2, SUN Xiao-gang2, ZHOU Chen3, YUAN Gui-bin1, ZHANG Zhi-lin1 |
1. College of Science, Harbin Engineering University, Harbin 150001, China 2. Department of Auto-Measure & Control, Harbin Institute of Technology, Harbin 150001, China 3. Heilongjiang Xinzheng Investment & Assurance Co., Ltd, Harbin 150001, China |
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Abstract 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.
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Received: 2010-05-10
Accepted: 2010-08-20
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Corresponding Authors:
XING Jian
E-mail: xingniat@sina.com;xingjian@brbeu.edu.cn
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