Pyrotechnics heating devices

Some chromates are used in expl, and pyro-technic compns. Discussions on their uses in pyrotechnic heating devices, pyrochemical gas generators and other pyro items are given in Ellern, Pyrotechnics(l961). 137, 147, 160,... 

With thermal batteries such electrolytes are used combined with a tailor-made rapidly acting pyrotechnic heating device. Typical temperatures of operation lie between 200 and 500 °C, depending on the system. A molten salt electrolyte is used, for example, in the lithium iron disulfide battery which is described below. 

Squib. 1) (General). Any of various small size pyrotechnic or explosive devices 2) (Specific). A small explosive device similar in appearance to a detonator, but loaded with low explosive, so that its output is primarily heat (flash). Usually electrically initiated, and provided to initiate action of burning type munitions, pyrotechnic devices and rocket propellants. An electrical squib consists essentially of a tube containing a flammable material, and a small charge of powder compressed around a fine resistance wire connected to electrical leads or terminals (Ref 40a, p 135)... 

Fireworks are a part of die field of civilian pyrotechnics (Greek pyr, fire techne, art) the rest of the field is railway fusees and torpedoes. Military pyrotechnics includes lights for signals and illumination, noise makers for training, heat sources, smokes, and some minor rocket effects. Many of the same formulas and devices are used in both fields with the military devices more sturdily built... 

Flash F use. A small explosive device similar in appearance to a detonator, but loaded with LE (low explosive), so that its output is primarily heat (flash). Usually electrically initiated, and employed to initiate action of pyrotechnic devices and rocket propellants. 

Heat-producing pyrotechnic compositions are used in a variety of applications, for example, as first fires in pyrotechnic devices to ignite other materials, as primers, as heat generators in pyrotechnic heaters, as propellants in gas generators and rocket motors, and as incendiary devices. 

Pyrotechnic compositions which are used in primers or first fires are very sensitive to initiation, whereas compositions which are used in heat-generating devices are less sensitive. The sensitivity of the compositions can be controlled by reducing the amount of oxidizer and choosing a less sensitive oxidizer. 

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