Reflective Properties and Radiation Resistance of Components of Thermal Control Coatings Based on CaSiO <sub>3</sub> – PbSiO <sub>3</sub>

The paper is focused on the study of the CaSiO3-PbSiO3 two-component system, which is promising for use as a basis for thermal control spacecraft coatings. The thermal behavior of silicate powders, their reflectivity, radiation resistance, as well as structural changes under electron irradiation with an energy of 30 keV, have been studied. When a mixture of α-CaSiO3-PbSiO3 powders is heated above the melting point of the binder component (800 °C), a phase transition of pseudo-wollastonite to β-CaSiO3 (wollastonite) is observed. The reflectivity of the powder mixture is lower than that of the original pure pigment of CaSiO3, which is explained by the presence of a silicate binder.