In what form do magnetic foreign bodies exist in chemical raw materials?

Stratification. According to official website of Inquiry Chemical Network, the magnetic foreign bodies in chemical raw materials are piled up together by van der Waals force, that is, intermolecular force, forming a layer, and the generated atoms are connected by chemical bonds. Therefore, the magnetic foreign bodies in chemical raw materials exist in layered form. Magnetic foreign bodies in chemical raw materials have high permeability, which will cause short circuit of batteries.