一、磁粉的种类和特性关于磁粉的种类,归纳起来如表1所示。表中列出了磁记录用的磁粉。一般常用的材料是尖晶石结构的γ-Fe_2O_3。高级录音机用的磁带是金红石结构的针状 First, the types and characteristics of magnetic powder On the types of magnetic powder, summarized in Table 1 below. The table lists the magnetic recording magnetic powder. Commonly used materials are spinel structure of γ-Fe_2O_3. Tapes used in advanced recorders are acicular in rutile structure