Abstract:Three series of tungsten type delay compositions numbered 0# (adding no Fe2O3),1# (adding 2% normal Fe2O3) and 2# (adding 2% nanoFe2O3) were prepared to investigate the effects of nanoFe2O3 on the burning characteristics of tungsten type delay composition. The experimental results show that the changes of burning rate of 1# and 2#,compared with 0#,are not distinct,however,the standard deviation of burning rate of 1# and 2# is decreased by 29% and 47%,and the relative error of 1# and 2# is decreased by 35% and 51%. Furthermore,the three compositions were tested by using TGDTA method,and the results show that the effects of normal Fe2O3 and nanoFe2O3 on the thermal characteristics of tungsten type delay composition are similar,and the processes of reaction are changed,moreover the ignition temperature is decreased by about 10 ℃,and the gas productions are reduced.