TY - JOUR
T1 - Total Hemispherical Emittance of Polyimide Films for Space Use in the Temperature Range from 173 to 700 K
AU - Fukuzawa, K.
AU - Ohnishi, A.
AU - Nagasaka, Y.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - This paper describes the temperature dependence of the total hemispherical emittance εh in the temperature range from 173 to 700 K for three types of thermal control materials, which are based on a thin polyimide film coated with aluminum on the back surface. The results obtained from the measurements are compared with calculated values from optical constants. The principle of the present measurement is based on the steady-state calorimetric method, and εh is obtained by measuring the equilibrium temperature of a sample corresponding to different heat inputs to a heater attached to the sample. On the other hand, the present calculation method is performed by using data for the optical constants of polyimide films and vapor-deposited metal in the wavelength region from 0.25 to 100 μm. These results agree with each other on the whole. It has been observed that the temperature dependence of εh is remarkable, and the values have a maximum around 410 K.
AB - This paper describes the temperature dependence of the total hemispherical emittance εh in the temperature range from 173 to 700 K for three types of thermal control materials, which are based on a thin polyimide film coated with aluminum on the back surface. The results obtained from the measurements are compared with calculated values from optical constants. The principle of the present measurement is based on the steady-state calorimetric method, and εh is obtained by measuring the equilibrium temperature of a sample corresponding to different heat inputs to a heater attached to the sample. On the other hand, the present calculation method is performed by using data for the optical constants of polyimide films and vapor-deposited metal in the wavelength region from 0.25 to 100 μm. These results agree with each other on the whole. It has been observed that the temperature dependence of εh is remarkable, and the values have a maximum around 410 K.
KW - Mercury orbiter mission
KW - Optical constants
KW - Polyimide film
KW - Steady-state calorimetric method
KW - Thermal control materials
KW - Total hemispherical emittance
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U2 - 10.1023/A:1013933917245
DO - 10.1023/A:1013933917245
M3 - Article
AN - SCOPUS:1942454208
SN - 0195-928X
VL - 23
SP - 319
EP - 331
JO - International Journal of Thermophysics
JF - International Journal of Thermophysics
IS - 1
ER -