Determination of Recombination Coefficients and Spectral Emissivity of Thermal Protection Materials

*† ‡ § This paper describes the method for the determination of the recombination coefficients for ceramic materials in air plasma and pure oxygen plasma. Additional a new method for the in situ determination of the spectral emissivity of the high temperature ceramic materials is presented. Values of the recombination coefficients for some materials, resulting from the described methodology, are given and compared with literature. Values of the spectral emissivities of the investigated materials are presented and compared with values obtained by other authors. Obtained results will be used for the development of catalytic sensors in the frame of the European re-entry program EXPERT.