Accession Number:

AD0258410

Title:

AN EXPERIMENTAL PROGRAM FOR OBTAINING THE THERMODYNAMIC PROPERTIES OF PROPELLANT COMBUSTION PRODUCTS

Descriptive Note:

Corporate Author:

PHILCO NEWPORT BEACH CA AERONUTRONIC DIV

Personal Author(s):

• HILDENBRAND, D. L.
• THEARD, L. P.

Report Date:

1961-06-15

Pagination or Media Count:

42.0

Abstract:

Torsion-effusion studies of the vaporization of ZrF4 were completed. The results yield a condensation coefficient of about 0.08 and a heat of sublimation of 55.8 kcalmole at 298 K. The heat of formation of ZrF4g at 298 K was derived as -401.1 3 kcalmole. Studies of the vaporization of ZrF4 in the presence of finely divided Zr indicate that lower fluorides are not formed under these conditions. The vapor pressures of AlF3 and a 11 mole ratio mixture of Li and Al fluorides were measured by the torsion-effusion method. A heat of sublimation at 298 K of 71.0 0.5 kcalmole was obtained for AlF3, from which the heat of formation of AlF3g at 298 K was derived as -285.3 2 kcalmole. The heat of formation of LiAlF4 at 298 K was derived as -447 7 kcalmole. Measurements of the dissociation pressure of AlN are in progress. The vaporization of Mg3N2 was studied from 1100 to 1260 K by the torsion method. A condensation coefficient of about 0.005 was indicated.

Descriptors:

• *COMBUSTION CHAMBER GASES
• *ROCKET PROPELLANTS
• ALUMINUM COMPOUNDS
• BORON COMPOUNDS
• COMBUSTION
• DISSOCIATION
• EVAPOTRANSPIRATION
• FLUORIDES
• HEAT OF FORMATION
• LITHIUM COMPOUNDS
• MAGNESIUM COMPOUNDS
• MASS SPECTROSCOPY
• NITRIDES
• PLATINUM
• TANTALUM
• THERMODYNAMICS
• VAPOR PRESSURE
• VAPORIZATION
• VAPORS
• ZIRCONIUM COMPOUNDS

Subject Categories:

• Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE