DETERMINATION OF THE EMISSIVITY OF MATERIALS. Progress Report, July 1, 1960-September 30, 1960

Technical Report · Wed Oct 31 00:00:00 EST 1962

OSTI ID:4782721

The total emittance of nine materials was measured at temperatures ranging up to 2200 deg F and at pressures of as low as 10/sup -8/ mm Hg. The specimens tested included sandblasted molybdenum, zirconium oxide, boron carbide in synar binder, aluminum phosphate with iron oxide, titanium oxide, titanium oxide and aluminum oxide, crystalline boron, platinum black, and chromium black. Titanium oxide and titanium oxide and aluminum oxide had emittances between 0.8 and 0.9 and aluminum phosphate had an emittance between 0.7 and 0.8. The results of the testing of the other specimens were compatible with the results of previous tests on the same materials. Endurance tests were also conducted on some of these specimens at various temperature levels. An investigation was made on the spectral emittance rig into the quality of the black body hole radiation. In this connection the effects of temperature perturbation and black body hole size were studied. This demonstrated the desirability of using specimen tubes with high thermal conductance and the necessity of having tubes of uniform emissivity and wall thickness. (auth)

• Research Organization: Pratt and Whitney Aircraft Div., United Aircraft Corp., Hartford, Conn.
• DOE Contract Number: NASW WITH AMENDMENT 1
• NSA Number: NSA-16-030800
• OSTI ID: 4782721
• Report Number(s): PWA-1877
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-62
• Country of Publication: United States
• Language: English

Related Subjects

METALS, CERAMICS, AND OTHER MATERIALS
ABSORPTION
ALUMINUM OXIDES
ALUMINUM PHOSPHATES
BORON
BORON CARBIDES
CATALYSIS
CEMENTS
CHROMIUM
CLEANING
CRYSTALS
EMISSION
ENERGY
HIGH TEMPERATURE
IRON OXIDES
MATERIALS TESTING
MOLYBDENUM
PLATINUM
PRESSURE
QUANTITATIVE ANALYSIS
RADIATIONS
SAND
SPECTRA
TEMPERATURE
THERMAL CONDUCTIVITY
THICKNESS
TITANIUM OXIDES
TUBES
WEAR
ZIRCONIUM OXIDES