National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Characterization and Performance of Thirteen Boron/Calcium Chromate Pyrotechnic Blends.

SAND810411

Publication Date	1981
Personal Author	Rogers, J. W.
Page Count	81
Abstract	A study of special 20/80 wt % B/CaCrO sub 4 pyrotechnic blends designed to determine which properties of the powders are important in determining pyrotechnic performance is presented. The effects of particle size, surface area, magnesium impurity, and surface properties on burn rate, hot wire and electrostatic ignition sensitivity and compaction behavior have been determined using a variety of techniques. The data indicate that small boron particle sizes (high boron surface areas) and/or better fuel-oxidizer coating tend to increase burn rate, lower hot wire ignition energies, and increase electrostatic ignition (spark) sensitivity. On the other hand, larger CaCrO sub 4 particle sizes (for a constant boron particle size) tend to increase hot wire and electrostatic ignition sensitivity while decreasing the burn rate. No correlation between magnesium impurity and any performance characteristic was observed, though calorific output was not determined. Backup analytical work, moisture uptake, and drying of the blends are discussed and a short section on compatibility is included. (ERA citation 06:020813)
Keywords	Chemical explosives Boron Calcium compounds Detonations Experimental data Impurities Mixtures Particle size Performance Physical properties Sensitivity ERDA/450100 NTISDE
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	79A - Ammunition, Explosives, & Pyrotechnics 79E - Detonations, Explosion Effects, & Ballistics
Corporate Authors	Sandia National Labs., Albuquerque, NM.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198121
Contract Number	AC04-76DP00789

Characterization and Performance of Thirteen Boron/Calcium Chromate Pyrotechnic Blends.

Characterization and Performance of Thirteen Boron/Calcium Chromate Pyrotechnic Blends.
SAND810411

Publication Date	1981
Personal Author	Rogers, J. W.
Page Count	81
Abstract	A study of special 20/80 wt % B/CaCrO sub 4 pyrotechnic blends designed to determine which properties of the powders are important in determining pyrotechnic performance is presented. The effects of particle size, surface area, magnesium impurity, and surface properties on burn rate, hot wire and electrostatic ignition sensitivity and compaction behavior have been determined using a variety of techniques. The data indicate that small boron particle sizes (high boron surface areas) and/or better fuel-oxidizer coating tend to increase burn rate, lower hot wire ignition energies, and increase electrostatic ignition (spark) sensitivity. On the other hand, larger CaCrO sub 4 particle sizes (for a constant boron particle size) tend to increase hot wire and electrostatic ignition sensitivity while decreasing the burn rate. No correlation between magnesium impurity and any performance characteristic was observed, though calorific output was not determined. Backup analytical work, moisture uptake, and drying of the blends are discussed and a short section on compatibility is included. (ERA citation 06:020813)
Keywords	Chemical explosives Boron Calcium compounds Detonations Experimental data Impurities Mixtures Particle size Performance Physical properties Sensitivity ERDA/450100 NTISDE
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	79A - Ammunition, Explosives, & Pyrotechnics 79E - Detonations, Explosion Effects, & Ballistics
Corporate Authors	Sandia National Labs., Albuquerque, NM.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198121
Contract Number	AC04-76DP00789