| 摘要 |
<p>A mixture (10) including at least one iron oxide and a non-magnetic matrix material is melted (13) or vaporized and then heat is rapidly removed (12) from the material. The resulting magnetic oxide precipitates are densely packed in the non-magnetic matrix (16). The precipitates have a narrow particle size distribution which results in a high signal-to-noise ratio when the oxides are used for magnetic recording purposes. The non-magnetic matrix can be removed to yield homogeneous, small particle iron oxide containing magnetic powder. Alternatively, the non-magnetic matrix/iron oxide material can be processed to yield a shaped recording medium.</p> |
