Infrared and Laser Engineering, Volume. 49, Issue 7, 20201021(2020)
Infrared extinction properties of typical aerosol particles(Invited)
Figures & Tables(9)
Fig. 3. Mid-infrared obscuring ratio of the tested particles vs time
Fig. 4. Time dependence of the far infrared obscuring ratio of the tested particles
Fig. 5. Mid-infrared obscuring ratio of aluminum powder at different target and background temperatures
Fig. 6. Far infrared obscuring ratio of aluminum powder at different background temperatures
Table 1. Testing result of mass extinction coefficient of the different particles
View tableView in ArticleTable 1. Testing result of mass extinction coefficient of the different particles
Parameters Mid-infrared （3.7-4.8 μm） Far-infrared （7.5-14 μm） Graphite（200 meshes） 0.63 0.64 Graphite（1 000 meshes） 1.02 1.01 Graphite（5 000 meshes） 1.28 1.23 Graphite（10 000 meshes） 1.54 1.43 Aluminum（1 000 meshes） 1.78 2.02
Table 2. IR refractive index of graphite and aluminum（n+ik）
View tableView in ArticleTable 2. IR refractive index of graphite and aluminum（n+ik）
λ /μmGraphite Aluminum n k n k 3 2.84 2.35 4.9 29.82 4 3.29 2.67 6.77 38.68 5 3.65 2.94 9.15 47.2 7 4.29 3.23 14.44 63.75 8 4.49 3.36 17.68 71.77 9 4.66 3.52 21.36 79.24 10 4.84 3.67 25.01 85.97 11 5 3.81 28.58 92.43 12 5.14 3.95 32.11 98.76 13 5.26 4.11 35.68 104.63 14 5.37 4.26 39.15 110.19
Table 3. Mass extinction coefficient of aluminum powder at different background temperatures
View tableView in ArticleTable 3. Mass extinction coefficient of aluminum powder at different background temperatures
Experimental conditions MECs/m2·g-1 Mid-IR （3.7-4.8 μm） Far-IR （7.5-14 μm） Case (1) T t：100 ℃T b：20 ℃1.78 2.02 Case (2) T t：100 ℃T b：60 ℃1.76 2.01 Case (3) T t：100 ℃T b：none1.29 0.67 Case (4) T t：60 ℃T b：20 ℃1.82 1.98 Case (5) T t：60 ℃T b：none0.79 0.37
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. Infrared extinction properties of typical aerosol particles(Invited)[J]. Infrared and Laser Engineering, 2020, 49(7): 20201021
Paper Information
Category: Special issue on infrared extinction technology
Received: Mar. 20, 2020
Accepted: --
Published Online: Sep. 18, 2020
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