The study of High permeability Manganese zinc ferrite

• Main Authors: Shuo cheng Chang, 張碩烝
• Other Authors: Hur -Lon Lin
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/11096914101021821303

碩士 === 大同大學 === 材料工程研究所 === 89 === In order to enhance the application properties of Mn-Zn ferrite, the improvement of its high permeability and low power loss are needed. Although,magnetic properties are highly influenced by the process of sintering and the variation of chemical composition. The could be enhanced with several ways included control proper grain size, avoid the formation of pores in the grains, decrease the temperature sensitivity, and etc. This is the main cause in order to have high permeability Mn-Zn ferrite. The composition of Mn-Zn ferrite in this study is formed with the molar ratio Fe2O3:MnO:ZnO=52.5:24.5:23.The initial permeability is from 3200 to 11599,depends on sintering processing.The magnetic properties are enhanced under the control of proper sintering atmosphere and the initial permeability could be reached from 9000 to 20000. The additive of CaCO3 is doped to improve the magnetic properties at higher frequency.