THERMAL CONDUCTIVITY OF ALUMINUM OXIDE.

reportActive / Technical Report | Accession Number: AD0649274 | Need Help?

Abstract:

The method developed earlier in our laboratory to measure thermal conductivity of materials at elevated temperatures has been applied to aluminum oxide. Aluminum oxide discs, 14 to 34 inches in diameter and variable height and grain size, were enveloped along the cylindrical surface in thin 0.001 inches thick platinum foils. The platinum foil was heated by induction to 1500-1800K and it, in turn, heated the aluminum disc through radiation. The temperature distribution along the flat surface of the sample could be divided into two parts toward the center of the sample, only volume lattice and radiation conduction was present at the edge of the sample, the temperature rose rapidly, indicating a finite absorption zone. In this zone, the absorption of the radiation from the platinum heater is not complete yet, and therefore, the temperature distribution and heat transmission in the sample is influenced by the properties of the platinum. Author

Author(s):
Hoch, M. ; Silberstein, A.
Author Organization(s):
CINCINNATI UNIV OHIO MATERIALS SCIENCE PROGRAM
Descriptive Note:
Technical rept., 1 Sep 65-31 Aug 66,
Supplementary Note:
Report on project Extreme High Temperature Research Studies, Techniques, and Measurements.
Pagination:
0028

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFML-TR-67-12
Contract/Grant Number(s):
AF 33(615)-1759
Task Number(s):
736704
Project Number(s):
AF-7367
Monitor Series:
TR-67-12
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*THERMAL CONDUCTIVITY, *ALUMINUM COMPOUNDS), OXIDES, TEMPERATURE, PLATINUM, ABSORPTION, MEASUREMENT, THERMAL RADIATION
Field(s)/Group(s):
Thermodynamics
Report Date:
1966 Nov 01