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Science and Technology of Energetic Materials

Vol.62, No.5 (2001)

Research paper

Electrostatic sensitivity for lead styphnate(*in Japanese)
Eishi Kuroda and Toshiyuki Nagaishi
p.217-224

Abstract

In order to evaluate electrostatic hazards in the circumstance under non - metallic contacts, electrolstatic sensitivity test of lead styphnate was carried out with the approaching electrode method under the condition that one metal electrode would not be in contact with another metal electrode while approaching. sensitivity of lead styphnate was strongly dependent on capacitance, gap length and series resistance. In this experiment, the minimum energies of 50 % ignition were to be 39 µJ with capacitance of 300 pF and no series resistance for small crystals, and for normal mass produced samples, 85 µJ with capacitance of 300 pF and no series resistance and 69 µJ with capacitance of 300 pF and resistance of 220 Ω, respectively. The effects of lot variation or aging upon the sensitivity of lead styphnate were almost comparable with those of the particle size or its distribution on sampling. Though the sensitivity was observed to be higher with the series resistance and for small particles or thin film samples under the condition that one metal electrode would be in contact with another metal electrode while approaching, these effects were not recognized in this experiment. The same results were also obtained in the experiment with the conductive material electrodes.

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