NEW ELECTRON BEAM OPTICS FOR THE PREPARATION OF INSULATING CRYSTALS BY THE FLOATING ZONE METHOD.

Abstract

The problems involved in the preparation of single crystals of refractory insulating materials are briefly outlined. The current status of the preparation of insulating crystals by the electron beam heated floating-zone method is reviewed, and the disadvantages are noted. The conception, construction and test of a new electron beam optics are described, and the advantages are pointed out. Sapphire, ruby and tungsten rods were zoned in testing the new optics. The influence of zone length, liquid - solid interface geometry, foreheater and afterheater temperature, and mechanical translation and rotation systems on crystal perfection are discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1966
Accession Number
AD0640961

Entities

People

  • Charles E. Ryan
  • Dennis P. Considine
  • John J. Hawley
  • Robert C. Marshall

Organizations

  • Air Force Cambridge Research Laboratories

Tags

DTIC Thesaurus Topics

  • Chemical Compounds
  • Construction
  • Crystals
  • Electron Beams
  • Electrons
  • Geometry
  • Inorganic Chemicals
  • Materials
  • Minerals
  • Rotation
  • Sapphire
  • Single Crystals
  • Synthetic Materials
  • Translations
  • Tungsten

Readers

  • Materials Science and Engineering.
  • Plasma Physics.
  • Systems Analysis and Design

Technology Areas

  • Directed Energy
  • Microelectronics
  • Microelectronics - Graphene