摘要:

AbstractHand‐made, charcoal‐containing black powders exhibited higher heats of combustion than commercial black powders; the values were also higher than values previously reported in the literature. However, commercial pellets attained maximum pressure in a closed bomb upon ignition more rapidly and had better physical integrity than the char‐coal‐containing laboratory products. When channel and furnace blacks were used instead of charcoal, pellets with excellent physical integrity were obtained. These products had lower heats of reaction than commercial black powder and also developed maximum pressure in a closed bomb more slowly. Although adding a small amount of water before or during grinding of mixtures of carbon, sulfur, and potassium nitrate did not affect the heat of reaction of the product significantly, this may have caused the density of some of the products to be abnormally low. Colloidal silica showed promise of being a useful additive in black powder manu

ISSN:0721-3115    

DOI:10.1002/prep.19830080502

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

摘要:

AbstractIn this second part of a series of publications dealing with the application of the Robbins‐Monro method to the sensitivity testing of explosives, the experimental aspects are treated. The results of an experimental program with a primer drop‐test apparatus confirmed the efficiency which was concluded from the computer simulation study, also for extreme percentage points. Further a method is described to determine the reliability of the outcome after the execution of the Robbins‐Monro process. It is shown that for an efficient application of the Robbins‐Monro method the level distance which can be adjusted should be about 1/2 to 1/3 of the standard deviation (of a normal distribution) dependent on the percentag

ISSN:0721-3115    

DOI:10.1002/prep.19830080503

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

摘要:

AbstractNew mechanical handling system for simulating the handling of explosive powders in the explosives factories have been designed, developed and successfully used for measurements of electrostatic charges under actual working conditions. The results of some of the important initiators using conventional friction/rolling method have been also discussed. The observations indicate that barium styphnate (red) shows positive charge whereas barium styphnate (yellow) shows negative charge.

ISSN:0721-3115    

DOI:10.1002/prep.19830080504

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

摘要:

AbstractPar utilisation des moyens comme la spectrographie infrarouge et la résonance magnétique nucléaire, combinée éventuellement avec la chromatographie sur couche mince, on a pu identifier les produits condensées de la décomposition thermique des esters nitriques, puis on propose une série de réactions aboutisant aux produits

ISSN:0721-3115    

DOI:10.1002/prep.19830080505

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

摘要:

AbstractAluminum in explosives is determined after sample dissolution with concentrated nitric acid. The pH of suitable aliquots, containing from 5 mg to 10 mg of aluminum, is adjusted to 3.4 to 3.8 with solid sodium acetate. Solutions are then titrated potentiometrically with 0.5 M sodium fluoride. The emf's are monitored with a fluoride ion‐selective electrode and a single‐junction reference electr

ISSN:0721-3115    

DOI:10.1002/prep.19830080506

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

摘要:

AbstractFor engineering purposes, the effects of blast waves on various target structures can be estimated quite easily with the aid of TNT‐equivalence. On the one hand, many experimental data are available on the blast damage done to structures, and on the other hand, the energy content of any source can be expressed in terms of an equivalent mass of TNT. The parameters involved in the propagation of a blast wave and in its interaction with target structures are discussed at some length in order to point out the inherent inaccuracies as well as the limits of applicability of the TNT‐equivalence met

ISSN:0721-3115    

DOI:10.1002/prep.19830080507

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19830080508

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19830080510

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19830080511

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19830080512

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY