PHYSICAL PROPERTIES OF HIGH TEMPERATURE MATERIALS. PART I. NEW APPARATUS FOR THE PRECISE MEASUREMENT OF HEAT CONTENT AND HEAT CAPACITY FROM 0 TO 1500 C. Period covered April 1956 to April 1957
Technical Report
·
OSTI ID:4333806
A new apparatus for the accurate measurement of the heat content and heat capacity of solids and liquids over the temperature range 0 deg to approximately 1500 deg C (32 to 2750 deg F) is described. For use of the drop'' method, a new Bunsen ice calorimeter and resistance-heated furnace were designed, and have been partly constructed. The ice calorimeter is similar to that developed earlier at the National Bureau of Standards, but embodies several minor modifications. To achieve regions of known and uniform temperature, the furnace was designed to have three concentric cores wound with 17 independently controlled wire-heater sections. Temperatures will be measured by several platinum-rhodium thermocouples, which are arranged to permit their periodic recalibration in place. After the performance of the apparatus has been tested, the first measurements undertaken are to be on stundard-sample synthetic sapphire (aluminum oxide). These data will augment the Bureau's earlier measurements on this material from 0 to 900 deg C (32 to 1650- deg F and permit its use as a heat- capacity standard up to approximately 1500 deg C. (auth)
- Research Organization:
- National Bureau of Standards, Washington, D.C.
- NSA Number:
- NSA-12-005473
- OSTI ID:
- 4333806
- Report Number(s):
- WADC-TR-57-374(Pt.I); AD-14211
- Country of Publication:
- United States
- Language:
- English
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