| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for production of a W-type ferrite improved in magnetic characteristic, particularly in coercive force. <P>SOLUTION: This method for producing the ferrite magnetic material having a hexagonal W-type ferrite as a main phase comprises a forming process for making a formed body containing a main ingredient and the first accessory ingredient comprising one, two or more selected from the ingredients of Ga, Al, W, Ce, Mo and Cr and a firing process for firing the resultant formed body. The formed body may comprise a calcined body containing both the main and the first accessory ingredients or may comprise a mixture of a calcined body composing the main ingredient with the first accessory ingredient. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
