STABLE FERRITES FOR R.F. APPLICATIONS.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0483733
Entities
People
- Charles F. O'neill
- R. K. Tenzer
- Sigismund Golian