Archive for February 2011

High Energy Materials (HEMs) conference 2011

Please be reminded that we are one month away from the abstract submission deadline for the HEMs 2011Conference, which is set for 30th March 2011 (attached the Call for Papers). 

The 2011 edition of the High Energy Materials (HEMs) conference is scheduled from 3rd to 4th October 2011 in La Rochelle, France .

 Please send your abstracts to Mr. Fabrice VORILLON (fabrice.vorillon@aaaf.asso.fr)

We are counting on your abstracts!

For further information, please visit www.hem2011.com or contact us at fabrice.vorillon@aaaf.asso.fr or 0033 (0)1 56 64 12 38. 

The 3AF Team

Fabrice Vorillon
3AF – Assistant de Gestion de Projet Evénementiel
Tél : +33 (0)1 56 64 12 38
Fax : +33 (0)1 56 64 12 31

Europyro 2011

37th International Pyrotechnics Seminar to be held in Reims France

17th-19th May 2011

Effect of Particle Size and Composition of Oxidisers on Sound Level Analysis of Firecrackers

A. Jeya Rajendrana and T. L. Thanulingam

Abstract: Two types of oxidizers, potassium nitrate (KNO3) and potassium perchlorate (KClO4), were used and the particle size of the oxidizers was varied by using a ball mill. The particle size was determined by a particle size analyser. Pyrotechnic mixtures of compositions using the two different oxidizers potassium nitrate and potassium perchlorate, in different particle sizes, mixed with sulphur (S), aluminium (Al) and boric acid (H3BO3) were used to make sound-producing bullet-bomb firecrackers for analysis. The bulk density of the pyrotechnic mixture was found to vary from 0.372 to 0.622 g cm−3 depending on the variation of composition and particle size of the mixture. Increasing the percentage of oxidizer in the pyrotechnic mixture from 50 to 57% increased the sound level but above 57% of oxidizer decreased the sound level produced from newly formulated bullet-bomb firecrackers. A linear relationship exists between the weight of the mixture taken and the sound level produced. Decreasing the particle size of the oxidizers increased the sound level of the firecrackers.
Keywords: Sound level, pyrotechnic mixture, bullet-bomb, firecrackers, ball mill, particle size analyser.


Ref: JPyro, Issue 30, 2011, pp3-10
(J30_3)
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JPyro – Issue 30, 2011 – Contents

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Ref: JPyro, Issue 30, 2011
(J30)


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Issue 29, 2010

Issue 29, 2010

This issue has now been closed and can be accessed via this webside.  If you subscriped to a Hard copy this should be with you by the end of February.  If you have not received it by then please contact us, as they are being sent out this week (21.02.11).