Method for preparing nickel-zinc ferrites

Claim 1

A METHOD FOR PREPAING A MAGNETIC BODY HAVING A UQ PRODUCT GREATER THAN 10,000 AT ABOUT 600 KC. AND CONSISTING ESSENTIALLY OF SINTERED NICKEL-ZINC FERRITE CRYSTALLITIES COMPRISING MIXING A BATCH OF RAW MATERIAL IN PROPORTIONS TO YIELD A NICKEL-ZINC FERRITE UPON HEATING, SAID BATCH CONSISTING ESSENTIALLY OF ABOUT 50 MOL PERCENT FERRIC OXIDE, ABOUT 22 TO 33 MOL PERCENT NICKEL OXIDE, AND ABOUT 17 TO 28 MOL PERCENT ZINC OXIDE, THE PROPORTION OF FERRIC OXIDE, NICKEL OXIDE AND ZINX OXIDE TOTALING ABOUT 100 MOL PERCENT, SAID BATCH CONTAINING IN ADDITION BETWEEN 0.001 AND 2.0 MOL PERCENT OF MOLYBDENUM AS A COMPOUND THEREOF, AND UP TO 2 MOL PERCENT OF AT LEAST ONE ELEMENT OF THE GROUP CONSISTING OF BARIUM, COBALT, AND VANADIUM, AS COMPOUNDS THEREOF, FORMING A PORTION OF SAID MIXTURE TO A DESIRED SHAPE, AND THEN HEATING SAID SHAPED MIXTURE IN AN OXYGEN ATMOSPHER AT TEMPERATURES BETWEEN 950*C. AND 1450*C. TO REACT SAID RAW MATERIALS TO PRODUCE CRYSTALLITIES OF SAID FERRITE AND TO SINTER SAID CRYSTALLITIES INTO A COHERENT BODY.