SINGLE CRYSTAL HEXAGONAL FERRITES.

Abstract

The solubility relationships were determined between several axial and planar hexagonal ferrites and a number of oxide solvent materials used in ferrite single crystal growth. Large single crystals (>2cc) of barium ferrites (H = 17,000Oe) and barium ferrite with Al and with Co and Ti substituting for Fe were grown from NaFeO2 by conventional slow cooling (1.5 C per hr) of melts contained in platinum crucibles. Planar single crystals of (ZnMn)Y were grown principally from barium borate (2BaO-B2O3) solvent compositions by slow cooling of melts with and without seeding and seed rotation techniques. Seeding without rotation holds no advantage over the uncontrolled nucleation in conventional solvent growth, but seed rotation results in single crystals one to two orders of magnitude larger. Planar ferrite single crystals up to 15 grams have been produced during this contract. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1966
Accession Number
AD0478364

Entities

People

  • J. Van Hook

Organizations

  • RTX

Tags

DTIC Thesaurus Topics

  • Barium
  • Barium Ferrites
  • Crystal Growth
  • Crystals
  • Ferrites
  • Materials
  • Rotation
  • Single Crystals
  • Solvents

Fields of Study

  • Materials science
  • Physics

Readers

  • Materials Science and Engineering.