Research Of Cobalt Titanium Substituted M-type Barium Magnetic Ferrites

This paper mainly studied the traditional ceramic process preparation of M typedoped titanium and cobalt hexagonal ferrite. Using the orthogonal experiment method toresearch the M type barium ferritedopedcobaltandtitanium.Determine the key factors andthe interaction between the factors in the experiment, simplify and speed up the wholeexperiment process and it is time-consuming.First, four factors which is in three levels orthogonal experiment was designed.Thefour factors arepresintering temperature, milling time, sintering temperature and holdingtime. Based on the Pareto diagram analysis methods such as factor between key factorsand the factors are interrelated.Then take the basic process parameters, determined by the orthogonal test, into thenext part of the experiment, to research the best cobalt, titanium doping ratio, the bestaddition of Bi₂O₃when it is sintering at low temperature, andthe best sinteringtemperature when Bi₂O₃is added. X-ray diffractometer （XRD）, scanning electronmicroscope （SEM） and vibrating sample magnetometer （VSM） is usedtocharacterizethecrystal structure, microstructure and magnetic properties, analysis of thesintering temperature and the effects on barium ferritedopedcobaltandtitanium which isbrought by the addition of the Bi₂O₃.By means of XRD for ferrite samples of organization structure, SEM patternsobserved ferrite microstructure of samples, ferrite samples of hysteresis loop measured byVSMand network analyzer for ferrite sample analysis of complex permeability make thebest of M type barium ferritedopedcobaltandtitanium.