Deflagration temperature

For the mixture described in the previous problem, calculate the adiabatic (deflagration) temperature when the initial cold temperature is 298 K and the pressure is the same as that calculated for the C-J point. 

The deflgrn point is influenced by the prepn method and lowered considerably by impurities Note It seems that deflagration point is the same as deflagration temperature ... 

Deflagration Temperature Test. See under Ignition (or Explosion) Temperature Test in Vol 1, pXVI... 

Ignition (or Explosion) Temperature Tests, also called Deflagration Temperature, Detonation Temperature and Flash Point Tests. 

Cratering Test (Essai dans la terre) (67-68) Deflagration Temperature (68) ... 

Deflagration Temperature Test. See Detonation (Explosion, Deflagration or Ignition) Temperature Test... 

The data indicate that BTATNB is slightly more thermally stable (m.p. 320 °C as compared with 310°C for PATO) coupled with better insensitivity toward impact and friction. Similarly, 5-picrylamino-l,2,3,4-tetrazole [72] (PAT) [Structure (2.28)] and 5,5 -styphnylamino-l,2,3,4-tetrazole [73] (SAT) [Structure (2.29)] have been synthesized by condensing picryl chloride and styphnyl chloride respectively with 5-amino-l,2,3,4-tetrazole in methanol. A comparison of thermal and explosive properties of newly synthesized PAT (deflagration temperature 203 °C and calc. VOD 8126ms"1) and SAT (deflagration temperature 140 °C and calc. VOD 8602 ms"1) reveals that PAT is more thermally stable than SAT but more sensitive to impact and friction. 

Deflagration Test or Deflagration Temperature Test. See Ignition Temperature Test in this section Deliquescence Test. See Hygroscopicity Test in this section Density Determinations will be discussed In Vol U, under D... 

The deflagration temperature was determined by heating a sample of 0.02 g in a glass tube in a Woods metal bath at a rate of 5°C/min. The temperature of ignition was recorded ". ... 

The comparative evaluation of the heat sensitivity of different explosives can be obtained by ignition temperature determination at a constant heating rate or isothermally. This temperature is also known as the deflagration point or deflagration temperature. 

Metal salts of hydrazoic acid from lead, silver, mercury, copper and other heavy metals are very sensitive to mechanical stimulus and explode easily. Heating of these metal azides causes stroug explosions. Table 1.1 suuunarizes some deflagration temperatures of well-known metal azides that decompose explosively when small samples embedded within a metal sleeve are dipped into a hot Wood metal bath. Although these temperatures are relatively high other new metal azide complexes might explode at much lower temperatures. 

Table 1.1 Deflagration temperatures of selected metal azides...

Melting point Position of reactive Deflagration temperature in °C ... 

In the third method, adiabatic heating, a sample is placed in an oven or furnace and heated at a slow rate. A thermocouple monitors the temperature at the sample. When an exothermic reaction starts, the temperature of the furnace is adjusted so no heat is gained or lost by the sample. The temperature at which the reaction accelerates to deflagration is called the autoignition or deflagration temperature. 

---