FINE-GRAIN DENSE FERRITES

Abstract

The purpose of the work is to develop and refine the techniques of preparation and evaluation of fine grained dense ferrites for use at both radio frequencies and microwave frequencies. Specifically, the radio-frequency applications are related to the temperature stabilized initial permeability that results from decreasing grain size while the microwave-frequency applications are related to the improved high-power characteristics that result from fine grain sizes. The construction of a flame-spray apparatus was accomplished and compositions prepared. X-ray analysis indicated single phase, stoichiometric compounds were formed in all cases. Hot pressed specimens of NiFe2O4 were prepared with grain sizes ranging from 5 microns to below 0.2 microns and ferrimagnetic resonance linewidths deter mined. The usual physical properties of ceramic specimens were determined for all samples. Line width measurements were made on samples of Ni(0.973)Co(.027)Fe2O4 that were prepared by the Signal Corps.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1963
Accession Number
AD0403292

Entities

People

  • A. E. Paladino
  • J. J. Green
  • J. S. Waugh
  • W. R. Bekebrede

Organizations

  • RTX

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Bricks
  • Chemistry
  • Crystals
  • Diffraction
  • Electronics
  • Electronics Laboratories
  • Ferrites
  • Frequency
  • Magnetic Materials
  • Materials
  • Methanols
  • Microwave Frequency
  • New York
  • Radio Frequency
  • Resonance
  • Thermal Spraying
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Microwave Engineering.
  • Reinforced Composite Materials