Results 151 to 160 of about 190,499 (204)

Sublimation of ammonium perchlorate

Thermochimica Acta, 1971
Abstract The sublimation of ammonium perchlorate has been investigated using simultaneous differential thermal analysis and thermogravimetric analysis. Critical evaluation of isothermal kinetics of data obtained by thermobarogravimetric technique indicate that the 'kinetics are consistent with an expression for a contracting cylinder rather than a ...
V.R. Pai Verneker, M. McCarty, J.N. Maycock   +2 more
openaire   +1 more source

Combustion of ammonium perchlorate

Symposium (International) on Combustion, 1967
Deflagration of ammonium perchlorate studied using cleaved sections of large single crystals grown from water solution, discussing burning rate and combustion ...
J.D. Hightower, E.W. Price
openaire   +1 more source

Dislocations in ammonium perchlorate

Journal of the Chemical Society A: Inorganic, Physical, Theoretical, 1971
The formation of etch pits on the cleavage surfaces of ammonium perchlorate single crystals has been studied by optical and electron microscopy. Ethyl and butyl alcohols and their mixtures were the most satisfactory etchants. Well defined etch pits could not be detected on the c face which dissolves very rapidly, going through three separate stages ...
P. J. Herley, P. W. M. Jacobs, P. W. Levy   +2 more
openaire   +1 more source

Atomic Force Microscopy of Ammonium Perchlorate

MRS Proceedings, 1992
AbstractWe have studied the (210) surface of ammonium perchlorate (NH4ClO4) with an atomic force microscope (AFM) in air. Large scale images show monomoreculat steps that are often aligned with major crystalline directions. Surface modification is clearly observed with forces as low as 30 nN, but is usually limited to the bottom and the sides of the ...
Minsun Yoo, Seokwon Yoon, Alex de Lozanne   +2 more
openaire   +1 more source

IGNITION OF AMMONIUM PERCHLORATE

Chemical Engineering Communications, 1979
A simplified theory for the ignition of ammonium perchlorate is proposed, which is derived from a unified theory that also explains the low-pressure deflagration limit as well as the steady deflagration. The theory provides an approximate method of calculating the ignition delay and the minimum external he»t flux for a successful ignition, as functions
openaire   +1 more source

Ammonium perchlorate and ammonium perchlorate - binder sandwich combustion

2013
Single crystal and pressed polycrystalline ammonium perchlorate (AP) wafers, pressed polycrystalline AP pellets, and ammonium perchlorate-binder (polybutadiene acrylic acid, hydroxyl terminated polybutadiene, polyurethane, and carboxyl terminated polybutadiene) sandwiches were burned in a schlieren equipped combustion bomb and in a centrifuge mounted ...
Murphy, J. L., Netzer, David Willis
openaire   +1 more source

Comparative DFT Study of Crystalline Ammonium Perchlorate and Ammonium Dinitramide

The Journal of Physical Chemistry A, 2008
The electronic structure, vibrational properties, absorption spectra, and thermodynamic properties of crystalline ammonium perchlorate (AP) and ammonium dinitramide (ADN) have been comparatively studied using density functional theory in the local density approximation.
Weihua, Zhu, Tao, Wei, Wei, Zhu, Heming, Xiao   +3 more
openaire   +2 more sources

Electrical conduction in ammonium perchlorate

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1972
D.c. along with a few a.c. electrical measurements are reported for ammonium perchlorate (AP) in compressed disc and single crystal form. The near-identity of the electrical conductivity of AP to that of certain other alkali perchlorates (also measured) makes conduction by protons according to schemes previously suggested unlikely though not impossible.
G. P. Owen, J. M. Thomas, J. O. Williams
openaire   +1 more source

Effect of tetramethylammonium perchlorate on ammonium perchlorate and propellant decomposition

Thermochimica Acta, 1976
Abstract The thermal decomposition of ammonium perchlorate (AP) is considerably modified when it is cocrystallized or mixed with small amounts of tetramethyl- ammonium perchlorate. The decomposition is sensitized when tetramethylphosphonium perchlorate is added to AP.
S.R. Jain, P.R. Nambiar
openaire   +1 more source

Anomalies in the burning of ammonium perchlorate and ammonium nitrate

Combustion, Explosion and Shock Waves, 1968
We have considered possible mechanisms of retardation of the chemical reactions when ammonium nitrate and perchlorate burn and have shown that one such mechanism is retardation by the water formed during combustion.
openaire   +1 more source