Process of manufacturing ternary ferrites containing manganese and zinc

Claim 1

A PROCESS OF MAKING MN-ZN FERRITES COMPRISING PROVIDING A WET, HYDRATED FERRIC OXIDE AND COMPOUNDS OF MANGANESE AND ZINC SELECTED FROM THE GROUP CONSISTING OF OXIDES, CARBONATES, OXALATES AND ACETATES THEREOF, MIXING SAID OXIDES TO PROVIDE APPROXIMATELY 50 MOL PERCENT OF HYDRATED FERRIC OXIDE CALCULATED AS FE2O3 AND A COMBINED TOTAL OF ABOUT 50 MOL PERCENT OF ZINC AND MANGANESE COMPOUNDS CALCULATED AS ZNO AND MNO RESPECTIVELY, THE PROPORTION OF WATER WITH SAID HYDRATED FERRIC OXIDE BEING SUFFICIENT TO PROVIDE A CREAMY CONSISTENCY TO THE MASS, PREFIRING THE MIXTURE BY RAPIDLY RAISING THE TEMPERATURE OF THE MASS TO 850*C. AND CONTINUING THE HEATING AT A TEMPERATURE OF ABOUT 850*C. TO 900*C. TO PROVIDE A CALCINE, THEREAFTER GRINDING THE CALCINE TO A POWDER, MOLDING THE POWDER TO SHAPE AND SINTERING THE MOLDED BODY AT ABOVE 1100*C.