铁氧体磁粉 meaning in English

ferromagnetic oxide powder

To measure the size of ba - ferrite fine magnetic particles , electromagnetic field was employed to drive the fine magnetic particles displace in order , then scanning electron microscope ( sem ) was used to observe and measure the size of ba - ferrite fine magnetic particles
为了迅速、准确地测定钡铁氧体磁粉颗粒的厚度、直径和厚径比的统计分布，采用对磁颗粒施加外加电磁场的方法，使各个磁颗粒的易磁化轴方向趋于一致，并用扫描电子显微镜观察钡铁氧体磁粉颗粒。