Stable Ferrites for R.F. Applications

Abstract

Material MF-9003 was further developed. Silicate additives, notably bentonite, were found to generally improve the stability of initial permeability and Q. A major problem found associated with the silicate additions was a severe change of Q with temperature. Divalent iron was very closely related to it. Too much divalent iron results in a considerable loss of Q with decreasing temperature and too little divalent iron results in a considerable increase in Q with decreasing temperature. The silicate containing materials were further improved by adding thorium nitrate. Cup core properties were evaluated in comparison with toroidal properties and a very favorable correlation was found. Overall, material MF-9060 (containing lead silicate and thorium nitrate), is probably the best material developed.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1967
Accession Number
AD0813989

Entities

People

  • Charles F. O'neill
  • R. K. Tenzer

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Air Gaps
  • Ceramic Materials
  • Crystal Structure
  • Curie Temperature
  • Department Of Defense
  • Electronic Components
  • Ferrites
  • Frequency
  • Iron Oxides
  • Low Temperature
  • Magnetic Materials
  • Magnetic Properties
  • Materials
  • Materials Laboratories
  • Materials Science
  • Measurement
  • Military Research
  • New Jersey
  • Q Meters
  • Resonant Frequency
  • United States

Readers

  • Analytical Chemistry
  • Manufacturing Engineering.
  • Materials Science and Engineering.