| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing ferrite powder which suppresses grain growth of a precursor of fine particles obtained from a liquid-phase reaction method and which simultaneously produces no different phase. <P>SOLUTION: The method for manufacturing ferrite powder comprises a step (a) of causing a precursor, obtained by the liquid-phase reaction method, to pass through a sieve 23 with openings of 2 mm or less, and a step (b) of causing the precursor which has passed through the sieve 23 to fall through the interior of a furnace tube 31 heated to the range 750-1,250°C by a heater 32, wherein, in the process of the precursor caused to fall through the interior of the furnace tube 31 heated by the heater 32, a ferrite powder, which is a hexagonal single ferrite, is obtained by heating the precursor to a prescribed temperature and holding the precursor at the prescribed temperature. <P>COPYRIGHT: (C)2009,JPO&INPIT |
