STABLE FERRITES FOR R.F. APPLICATIONS.
Rept. no. 9 (Final) 1 Jul-31 Dec 66,
INDIANA GENERAL CORP KEASBEY NJ RESEARCH DEPT
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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.
- Inorganic Chemistry