Mercury fulminate sand test

Raiko (Army) or Raisansuigin (Navy) Thunder Mercury . Mercuric Fulminate, Hg(ONC)2 mw 284.65, N 9.84% white to gray pdr, d 4.43, mp—decomp or detonates without melting Brisance by Sand Test—ca 55% TNT Expin Temp 210° in 5 secs Impact Sensitivity, BurMinesApp, 2-kg wt—5cm Power by Trauzl Test—51% TNT Rate of Deton 5000 at d 4.0 (AMCP 706-177, listed as Ref 8, p 201). Used straight by the Japanese in Instantaneous Fuzes, in Blasting Caps and in mixture called Bakufun (Ref 1, p 25 Ref 5, p 369)... 

The rate of detonation of a thin film of lead azide (0.1-0.5 mm thick) is 2100 m/sec (Bowden and Williams [101]). Lead azide is less sensitive to impact than mercury fulminate, but drop test figures quoted by various authors differ widely. Some of them report a negligible difference between the two, while others state it is considerable (e.g. that azide requires 2-3 times the height of drop necessary to explode fulminate). On the other hand, when mixed with pulverized sand lead azide is more... 

Butyl tetryl is suitable for use in boosters, reinforced detonators, detonating fuse, primer caps, etc. For the detonation of 0.4 gram, it requires 0.19 gram of mercury fulminate. It has a slightly greater shattering effect than TNT in the sand test and shows about the same sensitivity as tetryl in the drop test. It explodes spontaneously at 210°. 

Taylor and Rinkenbach have reported sand test data which show that cyanuric triazide is much more brisant than mercury fulminate.43... 

Clark reports experiments with diazodinitrophenol, mercury fulminate, and lead azide in which various weights of the explosives were introduced into No. 8 detonator capsules, pressed under reenforcing caps at 3400 pounds per square inch, and fired in the No. 2 sand test bomb. His results, tabulated below, show that diazodinitrophenol is much more powerful than mercury fulminate and lead azide. Other experiments by Clark showed... 

Hexamethylenetriperoxidediamine is almost insoluble in water and in the common organic solvents at room temperature. It detonates when struck a sharp blow, but, when ignited, bums with a flash like nitrocellulose. Taylor and Rinkenbach 63 found its true density (20°/20°) to be 1.57, its apparent density after being placed in a tube and tapped 0.66, and its density after being compressed in a detonator capsule under a pressure of 2500 pounds per square inch only 0.91. They found that it required a 3-cm. drop of a 2-kilogram weight to make it explode, but that fulminate required a drop of only 0.25 cm. In the sand test it pulverized 21/ to 3 times as much sand as mercury fulminate, and slightly more sand than lead azide. It is not dead-pressed by a pressure of 11,000 pounds per square inch. It is considerably... 

A 0.4-g sample of explosive, pressed at 3000 psi into a No. 6 cap, is initiated by lead azide or mercury fulminate (or, if necessary, by lead azide and tetryl) in a sand test bomb containing 200 g of on 30 mesh Ottawa sand. The amount of azide of Tetryl that must be used to... 

Properties Bright-yellow crystals or amorphous powder or granules. Sp. gr. 1.63. Explodes when heated to a temperature of 180°. Less sensitive to impact than either lead azide or mercury fulminate, much less sensitive to friction than the latter, and does not get dead-pressed. Cannot be detonated under water with a No. 8 electric detonator. The strength (sand-bomb test) is about, twice that of mercury fulminate or lead azide. The initiating power is greater than... 

The initiating efficiency is very high it surpasses mercury fulminate (several times) and even LA [48, 71, 88] (see Table 2.1). Taylor and Rinkenbach measured brisance of SA by the sand test [65]. They observed that brisance of SA is not that much greater than that to be expected for MF. Values for both primary explosives are summarized in Table 4.7. 

Brisance of DADP determined by the sand test is 30.1 g (0.4 g of peroxide initiated by 0.2 g mercury fulminate) which corresponds to 63 % TNT [17]. The initiation efficiency of DADP reported by Zhukov encyclopedia is between MF and LA [18]. This however disproved by Egorshev et al. [19] who tested DADP samples from 0.1 to 0.5 g pressed at 30 MPa with RDX as secondary charge in a blasting cap tube. Even 0.5 g DADP was not able to induce detonation of RDX, unlike TATP which caused full detonation of RDX in an amount of 0.1 g in the same conditions [19]. 

---