THERMAL CONDUCTIVITY OF BERYLLIUM OXIDE IN THE RANGE FROM 1000 TO 2000 C

Journal Article · Sun Dec 01 04:00:00 EST 1963 · At. Energ. (USSR)

OSTI ID:4116857

Kharlamov, A G

In previous studies on the thermal conductivity of dense BeO it was assumed that this property passes through a minimum at around 1700 deg C. The previously described stationary method (Teploenergetika No. 3, 64 (1961)) was used to determine the heat conductivity of this material between 1000 and 2000 deg C. The cylindrical specimens were heated internally by means of a W rod and the temperature measured by means of chromel-- alumel thermocouples and at high temperatures by Ir- Rh thermocouples. The experimental error was estimated at about 10%. The dependence of the thermal conductivity on the temperature in the range from 1000 to 2000 deg C may be expressed analytically by the formula lambda = (2 05 x 10/sup 4//T - 273) + 9 x 10/sup -14/ T/sup 3/ e/sup 3.74x1 0/ sup -3/T kcal m hr deg C, where T is given in deg K. A very flat minimum was found in the curve between 1600 and 1800 deg C; the increase started at 1700 and at 2000 deg C it reached a value 17% over the minimum. The role of the absorption coefficient on the course of the function was also examined. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-012050
• OSTI ID: 4116857
• Journal Information: At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 15
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
ALUMEL
ALUMINUM ALLOYS
BERYLLIUM OXIDES
CHEMISTRY
CHROMEL
CHROMIUM ALLOYS
CYLINDERS
DENSITY
EQUATIONS
ERRORS
HEATING
HIGH TEMPERATURE
IRIDIUM
MANGANESE ALLOYS
MEASURED VALUES
NICKEL ALLOYS
QUANTITATIVE ANALYSIS
RHODIUM
RODS
SILICIDES
TEMPERATURE
THERMAL CONDUCTIVITY
THERMOCOUPLES
TUNGSTEN