Affiliation:
1. NS3E Laboratory – UMR 3208 ISL/CNRS/UNISTRA French-German research Institute of Saint-Louis 15 rue du Général Cassagnou, B.P. 34 68301 Saint Louis CEDEX France
Abstract
AbstractSubmicron‐sized powders of silver azide (AgN3) were prepared by Curtius’ reaction between silver nitrate (AgNO3) and sodium azide (NaN3) in aqueous solutions by a new process: the Spray Flash Synthesis (SFS). The SFS process consists in spraying the two precursor solutions in a heated atomization chamber (130–190 °C), maintained under low vacuum (15–30 kPa). The reaction occurs in the droplets which have collided; the final size of particles is limited by the fast evaporation of water and the small amount of matter available in each droplet which can be considered as an individual micro‐reactor. The mean particle sizes of silver azide synthesized by the SFS process range from 220 nm to 390 nm, which means that these particles are three times smaller than those obtained by the conventional precipitation method. Submicron‐sized AgN3 powders can be initiated by a photographic flash.
Subject
General Chemical Engineering,General Chemistry
Reference32 articles.
1. P. Pascal Traité de chimie minérale1933 8 5586-33 p. 627.
2. Ueber Stickstoffwasserstoffsäure (Azoimid) N
3
H
3. J. Meissner Process of uninterruptedly carrying out the precipitation of heavy metallic azids particulary silver and lead azid1934 expired US Patent 1 959 731.
4. R. W. Millar Lead-Free Initiator Materials for Small Electro-Explosive Devices for Medium Caliber Munitions: Final Report 04 June 2003 QuinetiQ LTD Farnborough2004 Report QinetiQ/FST/CR032702/1.1.
5. R. Matyáš J. Pachman Primary Explosives. Springer Heidelberg New York2013 71–129.10.1007/978-3-642-28436-6.