Hi /sci/
I made 3 pyro compositions where boron was the fuel. The oxidiser in the first comp was Fe2O3. In the second it was Mn2O3 and in the third Ni2O3. The fuel to oxidiser mass ratio was 1:7 in all cases (since all oxidizers have similar molar weigth and the assumed products were B2O3 and pure metal) . Fe2O3 melts at approx. 1565*C. Mn2O3 melts at about 940*C and Ni2O3 melts at 600*C.
From these three compositions only the one with Mn2O3 burned in air (pressed in a tablet presser). It didn't burn pressed in metal tube, though.
Nonetheless, I can't figure out why the B/ Ni2O3 didn't burn since that oxidiser has the lowest melting point so it should be the easiest to ignite. So I made an additional one with Co2O3 and it also burned well in air. The Co2O3 melts at 895*C.
What am I missing, /sci/?
I made 3 pyro compositions where boron was the fuel. The oxidiser in the first comp was Fe2O3. In the second it was Mn2O3 and in the third Ni2O3. The fuel to oxidiser mass ratio was 1:7 in all cases (since all oxidizers have similar molar weigth and the assumed products were B2O3 and pure metal) . Fe2O3 melts at approx. 1565*C. Mn2O3 melts at about 940*C and Ni2O3 melts at 600*C.
From these three compositions only the one with Mn2O3 burned in air (pressed in a tablet presser). It didn't burn pressed in metal tube, though.
Nonetheless, I can't figure out why the B/ Ni2O3 didn't burn since that oxidiser has the lowest melting point so it should be the easiest to ignite. So I made an additional one with Co2O3 and it also burned well in air. The Co2O3 melts at 895*C.
What am I missing, /sci/?
