STUDY OF NON-OXIDE MATERIALS WITH DEFECT STRUCTURES

Abstract

Three types of defects were described and found to exist in high concentration. These defects were exemplified by: (a) The system 3NaF.5YF3- CaF2 (The Half-Breed Defect Type); (b) The system CaF2-YF3 (The Interstitial Anion Defect Type); (c) The system LaF3-SrF2 (The Anion Vacancy Defect Type). The existence and nature of the defects were characterized by documentation of several physical measurements such as density, refractive index, and x-ray determined lattice parameters. In addition to the preparation of 'test tube' amounts of material, large batches were prepared and experiments in hot-pressing significant-size specimens of selected compositions were conducted. Resulting polycrystalline ingots were used in attempting some of the measurements of physical properties.

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Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1964
Accession Number
AD0615609

Entities

People

  • D. A. Buckner
  • P. C. Velasquez

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Birefringence
  • Cell Size
  • Contracts
  • Crucibles
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Diffraction
  • Hot Pressing
  • Materials
  • Measurement
  • Physical Properties
  • Refractive Index
  • Scattering
  • Solid Solutions
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Systems Analysis and Design