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专利名称：Process of manufacturing ferrite materials
with improved magnetic and mechanicalproperties
发明人：Jean Berchtold申请号：US05/361697申请日：19730518公开号：US03948785A公开日：19760406
摘要：A process for preparing ferromagnetic ferrite powder is disclosed. According tothis process, solid ferrite forming metal compounds are calcined and subsequentlysintered while the oxygen content of the ambient atmosphere is controlled to maintainthe oxygen content of the ferrite substantially stoichiometric throughout the process. Asdisclosed herein, metal oxides can be used as the ferrite forming metal compounds andthe oxygen in the ambient atmosphere can be controlled during calcining and sinteringby using a flowing stream of nitrogen gas containing 0 to about 1%, by volume, ofoxygen. Ferromagnetic ferrite powders obtained by this process exhibit substantiallyuniform mircostructures and oxygen contents which are substantially stoichiometric.Examples of ferrite powders which are prepared by the process include manganese zincferrite and nickel zinc ferrite.
申请人：BERCHTOLD; JEAN
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