Properties of variable emissivity thermal control coatings

Perovskite structure manganese oxide thermal control coatings were synthesized by solid-state reaction method.The relationship between the total hemispherical emittance(eH)and the temperature of the thermal control coatings was measured on a calorimetric emissometer which was based on the steady state calorimetric method.The compounds show thermochromic properties andeH have low value at low temperature and have high value at high temperature.Environmental adaptability tests such as ultraviolet irradiation test,proton irradiation test,electron irradiation test,thermal cycle test,outgassing test were conducted also.The test results showed that thermal control coatings had very good space stability performance,which made the thermal control coatings attractive as potential active thermal control materials for future satellites.