Accurate measurement of the surface pressure distribution of spacecraft models under low-pressure conditions contrib-utes to the optimal design of space probes. Pressure-sensitive paint (PSP) is a non-contact optical measurement tech-nique for full-field surface pressure distribution. To apply PSP technology in rarefied gas environments, PSP with high pressure sensitivity and high pressure sensitivity constancy at low pressures needs to be developed. In this paper, the luminophore with long luminescence life, PdTFPP, the polymer with high oxygen permeability, room-temperature vulcan-ized silicone rubber (RTV), and micro-nano-particles with different types and contents are used to develop pressure-sensitive paints. The influences of particles type, particle contents, and dispersants on the static performances of the PSP are investigated. Experimental results indicate that the polymer-ceramic pressure-sensitive paint (PC-PSP) employing mesoporous silica (mSiO2) as the micro-nano-particles exhibits higher pressure sensitivity and lower photodegradation rate compared to other micro-nano-particles. PdTFPP/mSiO2-RTV with a particle content of 70 wt% and prepared with-out dispersant has a pressure sensitivity and pressure sensitivity constancy of 80.72 %/kPa and 99.44%, respectively, and its temperature sensitivity and photodegradation rate are -0.9 %/K and -0.09 %/min, respectively. In comparison to other PSP based on highly oxygen permeable polymers, PdTFPP/mSiO2-RTV (70 wt%) is demonstrated to be more suitable for static small pressure measurements in low pressure environments.
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