【摘要】 钡铁氧体磁粉是适合高密度磁记录使用的性能优越的记录材料之一．随着磁记录密度的不断提高，磁粉的粒度成为衡量磁粉性能的关键因素．为适应这一发展趋势，本文采用化学共沉淀方法，对制备条件、热处理工艺等进行了探索，研制出了超细的（0．15μm）、磁性能较好的（σs＝57emu／g，Hc＝2500Oe）钡铁氧体磁粉，并与国外同类样品作了比较．更多还原

【Abstract】 Barium ferrite (BF) hexagonal platelet particles is one of the most outstanding and prospective high-density magnetic recording media. To achieve higher recording density,the ultrafine size of magnetic powder becomes a crucial factor in determining its performance.To prepare fine BF particles of high quality the preparation conditions of the chemical copre-cipitation method are explored. The obtained BF fine particle has mean particle size of 0.15μm(TEM) and good magnetic characteristics (σs=57 emu/g, Hc=2 500 Oe), which comparefavorably with the foreign sample of the same material.更多还原