Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Sony Corp
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Sony Corp
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Publication date
Application filed by Sony CorpfiledCriticalSony Corp
Priority to JP10640776ApriorityCriticalpatent/JPS5331598A/en
Publication of JPS5331598ApublicationCriticalpatent/JPS5331598A/en
PURPOSE: To produce ϒ-Fe2O3 of few pores and good needle-like characteristics, excelling in magnetic prperty, orientation, and dispersibility, by surface-treating α-FeOOH powder with org. Al compounds and then subjecting it to dehydration, reduction, and heat-treatment.
COPYRIGHT: (C)1978,JPO&Japio
JP10640776A1976-09-061976-09-06Production of magnetic powder
PendingJPS5331598A
(en)