Effects of zirconium size on combustion characteristics of Zr/KP pyrotechnics

Aiming at solving the problem of low pumping efficiency of typical Zr/KClO4 pump source for pyrotechnically pumped laser, influence of particle size of Zr powders on the combustion property of Zr/KClO4 was investigated. It was indicated when the particle size of Zr powders decreased from 61.375 μm to 18.675 μm, the ignition temperatures of Zr/KClO4 dropped from 506.40 ℃ to 492.42 ℃, flash radiation lasting time shortened from 60 ms to 25 ms, peak flash intensities increased about 1 times.Spectral measurement showed the radiation spectra of Zr/KClO4 were continuous spectra with superposition of selective linear or band emissions of excited atoms or molecules. With the decrease of Zr particle, the emission of molecular ZrO strengthened, and radiation effi