Abstract:The recrystallization of 2,6diamino3,5dinitropyrazine1oxide (LLM105) was studied. Results show that mean particle diameter, purity and impact sensitivity of LLM105 may be quite different by different crystallization methods. The products obtained by cooling crystallization and solvent (DMOS)nonsolvent(hot water) crystallization have low impact sensitivity, the value of H50 are 120.0 cm and 108.3 cm. Thermal properties of LLM105 were studied by DSCTG, VST, TG and thermal explosion test. Thermal properties parameters of LLM105 are shown respectively: DSC exothermic onset temperature is 341.2 ℃ (heating rate 10 ℃·min-1); VST: 0.016 mL·g-1/120 ℃/48 h; loss of weight: 0.13%/120 ℃/48 h; thermal explosion temperature for 5 s explosion delay is 367.5 ℃. The results of VST show that LLM105 has good compatibility with HMX, AS, F2311, F2314 and estane. Measured detonation velocity of LLM105 (LLM105/F2314=95/5, 1.845 g·cm-3, 96.4% TMD) is 7991 m·s-1. The experimental results of pressuredensity curve show that LLM105 has good pressingmolded property.