Magnetic Properties of Recycled Mn-Zn Ferrite and their Applications to Magnetic Parts

We studied the possibility of creating electronic components using recycled powder prepared by grinding sludge of MnZn ferrite and commercially available clay for earthenware. The effects of the mixing ratios and heat treatment conditions on the magnetic properties and microstruetures of sintered samples were investigated. As the result, we found that it is possible to utilize the mixtures as composite materials for producing electromagnetic wave absorbers with better properties than those currently in use (R.L. ≥20 dB). The matching frequency and matching thickness were controlled 0.9 GHz to 5.5 GHz and 8 mm to 4 mm, respectively.