Method of coating a substrate with magnetic ferrite film

Claim 1

THE METHOD OF COATING A SUBSTRATE WITH MAGNETIC FERRITE FILM OF ABOUT 7 TO 23 MICRONS IN THICKNESS COMPRISING MIXING AN ALCOHOLIC SOLUTION OF FERRIC NITRATE WITH AN ALCHOLIC SOLUTION OF AT LEAST ONE NITRATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL, ALUMINUM, ZINC, AND COBALT IN THE STOICHIOMETRIC PROPORTION NECESSARY TO FORM THE FERRITE, IMMERSING A SUBSTRATE THAT IS THERMALLY STABLE UP TO 1100*C. INTO THE THUS PREPARED SOLUTION, PRELIMINARY FIRING THE COATED SUBSTRATE AT 400* C. TO 700*C., COOLING THE COATED SUBSTRATE, REPEATING THE IMMERSION, PRELIMINARY FIRING AND COOLING STEPS UNTIL THE DESIRED AMOUNT OF MAGNETIC FERRITE MATERIAL IS DEPOSITED IN SITU ON THE SUBSTRATE, AND FIRING THE COATED SUBSTRATE AT 1000*C. TO 1100*C. FOR ONE TO FIVE HOURS TO ALIGN THE OXIDES FORMED TO THE SPINEL STRUCTURE OF THE FERRITE.

Claim 2

THE METHOD OF COATING A SUBSTRATE WITH MAGNETIC FERRITE FILM OF ABOUT 7 TO 23 MICRONS IN THICKNESS COMPRISING MIXING AN ALCOHOLIC SOLUTION OF FERRIC NITRATE WITH AN ALCHOLIC SOLUTION OF AT LEAST ONE NITRATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL, ALUMINUM, ZINC, AND COBALT IN THE STOICHIOMETRIC PROPORTION NECESSARY TO FORM THE FERRITE, IMMERSING A SUBSTRATE THAT IS THERMALLY STABLE UP TO 1100*C. INTO THE THUS PREPARED SOLUTION, PRELIMINARY FIRING THE COATED SUBSTRATE AT 400* C. TO 700*C., COOLING THE COATED SUBSTRATE, REPEATING THE IMMERSION, PRELIMINARY FIRING AND COOLING STEPS UNTIL THE DESIRED AMOUNT OF MAGNETIC FERRITE MATERIAL IS DEPOSITED IN SITU ON THE SUBSTRATE, AND FIRING THE COATED SUBSTRATE AT 1000*C. TO 1100*C. FOR ONE TO FIVE HOURS TO ALIGN THE OXIDES FORMED TO THE SPINEL STRUCTURE OF THE FERRITE.