OPTICAL AND INFRARED PROPERTIES OF AL2O3 AT ELEVATED TEMPERATURES, Volume 2

Abstract

An investigation was made of the absorption coefficient and the index refraction as a function of both wavelength and temperature. Samples of single crystals of Al2O3 (sapphire) were heated to various temperatures up to 2020C. The absorption coefficient and index of refraction were measured as a function of wavelength from 0.546 microns to approximately 6 microns. Measurements of the emission of polycrystalline Al2O3, which is a ceramic material made for use in high temperature furnaces, indicates that the general behavior of the emissivity is similar to what one would expect on the basis of the measurements of the absorption coefficient of the single crystal sapphire.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1964
Accession Number
AD0606793

Entities

People

  • D. A. Gryvnak
  • D. E. Burch

Tags

Communities of Interest

  • Biomedical
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Absorption Cross Sections
  • Aluminum Oxides
  • Ceramic Materials
  • Commerce
  • Detectors
  • Equations
  • High Temperature
  • Materials
  • Measurement
  • Melting Point
  • Optical Pyrometers
  • Optics
  • Physics Laboratories
  • Refraction
  • Refractive Index
  • Temperature Gradients

Fields of Study

  • Materials science
  • Physics

Readers

  • Atmospheric Remote Sensing.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Thermal Physics or Thermal Science.