HABIT CHANGES OF SAPPHIRE GROWN FROM PbO-PbF2 AND MoO3-PbF2 FLUXES.

Abstract

Single crystals of Al2O3 (sapphire) were grown from both PbO-PbF2 and MoO3-PbF2 fluxes. Their habits varied from flat plates (PbF2-rich melts) to equidimensional crystals (PbO- or MoO3-rich melts). The primary growth planes on these crystals are basal planes (0001), first-order rhombs (10-11), and second-order rhombs (01-12). The habit change is interpreted on the basis of F(1-) crystal contamination and Pb(2+) surface adsorption. Possible ion species in the melt and their relative importance on crystal growth from these melt systems are discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 10, 1969
Accession Number
AD0701376

Entities

People

  • Armond B. Chase
  • Judith A. Osmer

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Adsorption
  • Contamination
  • Crystal Growth
  • Crystallization
  • Crystals
  • Sapphire
  • Single Crystals

Readers

  • Fluid Dynamics.
  • Materials Science and Engineering.