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A platform for research: civil engineering, architecture and urbanism
Stable Ferrites for R.F. Applications
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.
Stable Ferrites for R.F. Applications
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.
Stable Ferrites for R.F. Applications
C. F. O'Neill (author) / S. Golian (author) / R. K. Tenzer (author)
1966
32 pages
Report
No indication
English
Resistive, Capacitive, & Inductive Components , Iron & Iron Alloys , Ferrites , Magnetic cores , Spinel , Tuned circuits , Radiofrequency , Magnetic materials , Controlled atmospheres , Aging(Materials) , Magnetic properties , Permeability(Magnetic) , Clay minerals , Stability , High frequency , Powder metals , Iron , Manufacturing , Bentonite