Applications of the Optical Differential Thermal Analysis.

Abstract

ODTA detects temperature contact less, hence, it expands the upper usable temperature limit of DTA up to 3600 C accordingly suitable for studies of systems where enthalpic changes occur at high temperatures. Application of the computer graphics for the evaluation of the ODTA curves is demonstrated on melting of Y2OO3.A12O3 and Ya13-GdA1O3 systems. Measurement errors occurring at temperatures above 1900 C are pointed out and possibilities for their elimination or at least diminution are discussed. Keywords: Thermal analysis, Optical method, Data acquisition, Sapphire melting, Mathematical differentiation, Electronic differentiation, Emissivity measurements, Color graphics. (MJM)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1988
Accession Number
ADA196706

Entities

People

  • Jaroslav L. Caslavsky

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Computer Programming
  • Crystal Structure
  • Data Acquisition
  • Energy
  • Graphics
  • Heat Energy
  • Heat Transfer
  • Isotherms
  • Jet Propulsion
  • Materials
  • Measurement
  • Melting Point
  • Optical Pyrometers
  • Radiation
  • Thermal Analysis
  • Universities

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.
  • Theoretical Analysis.

Technology Areas

  • Microelectronics