Ⅰ.引言 锰锌铁氧体罐型磁芯做为滤波器材料在通讯工程中得到了广泛的应用。为了获得高导磁率、低损耗、低温度系数的材料,目前我国多采用硫酸盐工艺(即用硫酸亚铁、硫酸锰、硫酸锌做为原料)。但在生产过程中,硫酸盐释放出大量的二氧化硫,造成对环境的污染,严重影响工人的身体健康。为了解决这个问题,北京大学物理系磁学专业七三届教育革命小分 Ⅰ. INTRODUCTION MnZn ferrite can core type has been widely used as a filter material in communication engineering. In order to obtain high permeability, low loss, low temperature coefficient of material, at present, China use more sulfate process (ie, ferrous sulfate, manganese sulfate, zinc sulfate as raw material). However, in the production process, sulfate releases a large amount of sulfur dioxide, causing environmental pollution and seriously affecting the health of workers. In order to solve this problem, the Department of Physics, Peking University, 73 three major revolution in education revolution