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铁氧体的显微结构、电磁性能和机械性能在很大程度上依赖于起始粉料的物理化学性能。在有些场合,目前生产中采用的氧化物法和硫酸盐法已不能满足提高产品质量的要求。譬如,快速电子计算机的发展,要求制备尺寸很小的记忆磁芯。磁芯愈小,对于起始粉料的均匀性要求愈高;高磁导率铁氧体及高μ_Q铁氧体的制备也要求纯度高、活性高的粉料;另外,在热压的场合也是这样。因为热压温度一般比较低,保温时间短,为了使铁氧体化合完全,形成单一
The microstructure, electromagnetic properties, and mechanical properties of ferrites are strongly dependent on the physicochemical properties of the starting powders. In some cases, the oxide method and sulfate method used in the current production can not meet the requirements of improving product quality. For example, the rapid development of electronic computers requires the preparation of small size memory cores. The smaller the core, the higher the uniformity of the starting powder; the preparation of high permeability ferrite and high μ_Q ferrite also require high purity, high activity powder; In addition, the hot pressing of the occasion Also like this. Because the hot pressing temperature is generally lower, holding time is short, in order to complete the ferrite compound to form a single