A Calorimetric Approach for Measuring Emittance and Normal Spectral Absorptance at Elevated Temperatures.

Abstract

A differential calorimeter designed to measure total hemispherical emittance and normal spectral absorptance as a function of temperature is described. The mathematical analysis necessary to calculate both of these parameters is presented. The experimental results obtained with a sample of SiC/A1203 (silicon carbide/alumina) are discussed. It was found that the emittance of SiC/A1203 is 1 at 200 deg C and decreases to about 0.81 at 700 deg C. The absorptance of CO2 CW laser radiation (10.6 micrometers) is 0.85 and remains constant within the range of 600 to 700 deg C. Originator-supplied keywords include: Calorimeter, High temperature, and Laser.

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Document Details

Document Type
Technical Report
Publication Date
Jan 28, 1985
Accession Number
ADA151292

Entities

People

  • F. Izaguirre
  • L. Fishman

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Assembly
  • Calorimeters
  • Electric Power
  • Equations
  • High Temperature
  • Lasers
  • Materials
  • Materials Science
  • Mathematical Analysis
  • Measurement
  • Measuring Instruments
  • Optical Properties
  • Radiation
  • Refractory Metals
  • Silicon Carbide

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Pulsed Power and Plasma Physics.
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers