Accession Number : AD0483733

Title :   STABLE FERRITES FOR R.F. APPLICATIONS.

Descriptive Note : Quarterly rept. no. 6, 1 Oct-31 Dec 65,

Corporate Author : INDIANA GENERAL CORP KEASBEY NJ RESEARCH DEPT

Personal Author(s) : O'Neill, Charles F. ; Golian, Sigismund ; Tenzer, R. K.

Report Date : MAY 1966

Pagination or Media Count : 35

Abstract : A formulation of MF-9304, the basic material being developed for this contract, was prepared with an addition of approximately 10 weight % of a silicate mineral called bentonite. Results presented were verified by additional measurements. Also, the instability factors such as dis-accommodation, d.c. field and a.c. drive effects were easured. An upper useful frequency (uuf) of 19.7 Mc/s and uuf. (mu sub o)Q product of 59000 were found. Instability effects concerning mu sub o were found to be: TF = 2.5 PPM/C, DAF = 20.8 PPM, d.c. field = 0.48%, and a.c. drive = 0.22%. A factor for total instability called IF was determined and its value is 1.7% for this bentonite containing material (MF-9353-S). For MF-9304 the value of IF was 10.7%. Reproducibility studies on new firings of the original hatch of material and on a new batch of material were made and in regard to mu sub o, Q and TF the results were equivalent to or better than those obtained on the initial samples. Other instability factors on the new batches have to be studied yet.

Descriptors :   (*FERRITES, SPINEL), (*MAGNETIC CORES, TUNED CIRCUITS), RADIOFREQUENCY, MAGNETIC MATERIALS, CONTROLLED ATMOSPHERES, AGING(MATERIALS), MAGNETIC PROPERTIES, PERMEABILITY(MAGNETIC), CLAY MINERALS, STABILITY, HIGH FREQUENCY, POWDER METALS, IRON, MANUFACTURING.

Subject Categories : Electrical and Electronic Equipment
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE