The EFG (Edge Defined, Film-Fed Growth) Growth and Application of Small Diameter Sapphire Crystals with Rod and Tubular Shapes,

Abstract

Small diameter sapphire crystals with rod or tubular shapes have been grown by the EFG (Edge defined, Film-fed Growth) method. The effect of the growth technique on the perfection of a crystal has also been investigated, leading the quality of crystal grown by this method to be comparable to that by the flame fusion method. The tubular crystals have been used in making special light sources, and the growth technique of rod sapphire crystals has been applied in a factory for producing jewel bearings. The EFG method greatly simplifies the technique of processing crystals after growth, and the method of multi-rod EFG growth has also been realized. Therefore the cost of production has been lowered, achieving a better economical efficiency.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 28, 1985
Accession Number
ADA161363

Entities

People

  • Lian-an Tang
  • Shou-qing Zhang
  • Wen Wang
  • Xiu-hong Le

Organizations

  • National Air and Space Intelligence Center

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bearings
  • Boundaries
  • Carbon Dioxide Lasers
  • Cellular Structures
  • Conduction (Heat Transfer)
  • Corrosion Resistance
  • Crystal Growth
  • Crystals
  • Foreign Technology
  • Grain Boundaries
  • Jewel Bearings
  • Lasers
  • Latent Heat
  • Light Sources
  • Materials
  • Surface Waves
  • Thermal Conductivity

Readers

  • Geodesy
  • Semiconductor Device Technology
  • Thermal Physics or Thermal Science.